BSD Support + Active IP in API + Timeouts tuning + Apple/XNU Connectivity fixes + Admission-timeouts + Global Each TCP Connections: merge pull request #611 from telemt/flow

BSD Support + Active IP in API + Timeouts tuning + Apple/XNU Connectivity fixes + Admission-timeouts + Global Each TCP Connections

CONTRIBUTING.md

@@ -1,19 +1,82 @@
-# Issues - Rules
+# Issues
+## Warnung
+Before opening Issue, if it is more question than problem or bug - ask about that [in our chat](https://t.me/telemtrs)
+
 ## What it is not
 - NOT Question and Answer
 - NOT Helpdesk
 
-# Pull Requests - Rules
+***Each of your Issues triggers attempts to reproduce problems and analyze them, which are done manually by people***
+
+---
+
+# Pull Requests
+
 ## General
 - ONLY signed and verified commits
 - ONLY from your name
-- DO NOT commit with `codex` or `claude` as author/commiter
+- DO NOT commit with `codex`, `claude`, or other AI tools as author/committer
 - PREFER `flow` branch for development, not `main`
 
-## AI
-We are not against modern tools, like AI, where you act as a principal or architect, but we consider it important:
+---
 
-- you really understand what you're doing
-- you understand the relationships and dependencies of the components being modified
-- you understand the architecture of Telegram MTProto, MTProxy, Middle-End KDF at least generically
-- you DO NOT commit for the sake of commits, but to help the community, core-developers and ordinary users
+## Definition of Ready (MANDATORY)
+
+A Pull Request WILL be ignored or closed if:
+
+- it does NOT build
+- it does NOT pass tests
+- it does NOT follow formatting rules
+- it contains unrelated or excessive changes
+- the author cannot clearly explain the change
+
+---
+
+## Blessed Principles
+- PR must build
+- PR must pass tests
+- PR must be understood by author
+
+---
+
+## AI Usage Policy
+
+AI tools (Claude, ChatGPT, Codex, DeepSeek, etc.) are allowed as **assistants**, NOT as decision-makers.
+
+By submitting a PR, you confirm that:
+
+- you fully understand the code you submit
+- you verified correctness manually
+- you reviewed architecture and dependencies
+- you take full responsibility for the change
+
+AI-generated code is treated as **draft** and must be validated like any other external contribution.
+
+PRs that look like unverified AI dumps WILL be closed
+
+---
+
+## Maintainer Policy
+
+Maintainers reserve the right to:
+
+- close PRs that do not meet basic quality requirements
+- request explanations before review
+- ignore low-effort contributions
+
+Respect the reviewers time
+
+---
+
+## Enforcement
+
+Pull Requests that violate project standards may be closed without review.
+
+This includes (but is not limited to):
+
+- non-building code
+- failing tests
+- unverified or low-effort changes
+- inability to explain the change
+
+These actions follow the Code of Conduct and are intended to preserve signal, quality, and Telemt's integrity

Cargo.lock

@@ -2793,7 +2793,7 @@ checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
 
 [[package]]
 name = "telemt"
-version = "3.3.32"
+version = "3.3.35"
 dependencies = [
  "aes",
  "anyhow",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "telemt"
-version = "3.3.33"
+version = "3.3.35"
 edition = "2024"
 
 [features]

README.md

@@ -2,6 +2,8 @@
 
 ***Löst Probleme, bevor andere überhaupt wissen, dass sie existieren*** / ***It solves problems before others even realize they exist***
 
+[**Telemt Chat in Telegram**](https://t.me/telemtrs)
+
 **Telemt** is a fast, secure, and feature-rich server written in Rust: it fully implements the official Telegram proxy algo and adds many production-ready improvements such as:
 - [ME Pool + Reader/Writer + Registry + Refill + Adaptive Floor + Trio-State + Generation Lifecycle](https://github.com/telemt/telemt/blob/main/docs/model/MODEL.en.md)
 - [Full-covered API w/ management](https://github.com/telemt/telemt/blob/main/docs/API.md)
@@ -9,60 +11,6 @@
 - Prometheus-format Metrics
 - TLS-Fronting and TCP-Splicing for masking from "prying" eyes
 
-[**Telemt Chat in Telegram**](https://t.me/telemtrs)
-
-## NEWS and EMERGENCY
-### ✈️ Telemt 3 is released!
-<table>
-<tr>
-<td width="50%" valign="top">
-
-### 🇷🇺 RU
-
-#### О релизах
-
-[3.3.27](https://github.com/telemt/telemt/releases/tag/3.3.27) даёт баланс стабильности и передового функционала, а так же последние исправления по безопасности и багам
-
-Будем рады вашему фидбеку и предложениям по улучшению — особенно в части **API**, **статистики**, **UX**
-
----
-
-Если у вас есть компетенции в:
-
-- Асинхронных сетевых приложениях  
-- Анализе трафика  
-- Реверс-инжиниринге  
-- Сетевых расследованиях  
-
-Мы открыты к архитектурным предложениям, идеям и pull requests
-</td>
-<td width="50%" valign="top">
-
-### 🇬🇧 EN
-
-#### About releases
-
-[3.3.27](https://github.com/telemt/telemt/releases/tag/3.3.27) provides a balance of stability and advanced functionality, as well as the latest security and bug fixes
-
-We are looking forward to your feedback and improvement proposals — especially regarding **API**, **statistics**, **UX**
-
----
-
-If you have expertise in:
-
-- Asynchronous network applications  
-- Traffic analysis  
-- Reverse engineering  
-- Network forensics  
-
-We welcome ideas, architectural feedback, and pull requests.
-</td>
-</tr>
-</table>
-
-# Features
-💥 The configuration structure has changed since version 1.1.0.0. change it in your environment!
-
 ⚓ Our implementation of **TLS-fronting** is one of the most deeply debugged, focused, advanced and *almost* **"behaviorally consistent to real"**:  we are confident we have it right - [see evidence on our validation and traces](#recognizability-for-dpi-and-crawler)
 
 ⚓ Our ***Middle-End Pool*** is fastest by design in standard scenarios, compared to other implementations of connecting to the Middle-End Proxy: non dramatically, but usual

docs/FAQ.en.md

@@ -1,113 +1,122 @@
-## How to set up "proxy sponsor" channel and statistics via @MTProxybot bot
+## How to set up a "proxy sponsor" channel and statistics via the @MTProxybot
 
-1. Go to @MTProxybot bot.
-2. Enter the command `/newproxy`
-3. Send the server IP and port. For example: 1.2.3.4:443
-4. Open the config `nano /etc/telemt/telemt.toml`.
-5. Copy and send the user secret from the [access.users] section to the bot.
-6. Copy the tag received from the bot. For example 1234567890abcdef1234567890abcdef.
+1. Go to the @MTProxybot.
+2. Enter the `/newproxy` command.
+3. Send your server's IP address and port. For example: `1.2.3.4:443`.
+4. Open the configuration file: `nano /etc/telemt/telemt.toml`.
+5. Copy and send the user secret from the `[access.users]` section to the bot.
+6. Copy the tag provided by the bot. For example: `1234567890abcdef1234567890abcdef`.
 > [!WARNING]
 > The link provided by the bot will not work. Do not copy or use it!
-7. Uncomment the ad_tag parameter and enter the tag received from the bot.
-8. Uncomment/add the parameter `use_middle_proxy = true`.
+7. Uncomment the `ad_tag` parameter and enter the tag received from the bot.
+8. Uncomment or add the `use_middle_proxy = true` parameter.
 
-Config example:
+Configuration example:
 ```toml
 [general]
 ad_tag = "1234567890abcdef1234567890abcdef"
 use_middle_proxy = true
 ```
-9. Save the config. Ctrl+S -> Ctrl+X.
-10. Restart telemt `systemctl restart telemt`.
-11. In the bot, send the command /myproxies and select the added server.
+9. Save the changes (in nano: Ctrl+S -> Ctrl+X).
+10. Restart the telemt service: `systemctl restart telemt`.
+11. Send the `/myproxies` command to the bot and select the added server.
 12. Click the "Set promotion" button.
 13. Send a **public link** to the channel. Private channels cannot be added!
-14. Wait approximately 1 hour for the information to update on Telegram servers.
+14. Wait for about 1 hour for the information to update on Telegram servers.
 > [!WARNING]
-> You will not see the "proxy sponsor" if you are already subscribed to the channel.
+> The sponsored channel will not be displayed to you if you are already subscribed to it.
 
-**You can also set up different channels for different users.**
+**You can also configure different sponsored channels for different users:**
 ```toml
 [access.user_ad_tags]
 hello = "ad_tag"
 hello2 = "ad_tag2"
 ```
 
-## Why is middle proxy (ME) needed
+## Why do you need a middle proxy (ME)
 https://github.com/telemt/telemt/discussions/167
 
-## How many people can use 1 link
 
-By default, 1 link can be used by any number of people.  
-You can limit the number of IPs using the proxy.
+## How many people can use one link
+
+By default, an unlimited number of people can use a single link.  
+However, you can limit the number of unique IP addresses for each user:
 ```toml
 [access.user_max_unique_ips]
 hello = 1
 ```
-This parameter limits how many unique IPs can use 1 link simultaneously. If one user disconnects, a second user can connect. Also, multiple users can sit behind the same IP.
+This parameter sets the maximum number of unique IP addresses from which a single link can be used simultaneously. If the first user disconnects, a second one can connect. At the same time, multiple users can connect from a single IP address simultaneously (for example, devices on the same Wi-Fi network).
 
 ## How to create multiple different links
 
-1. Generate the required number of secrets `openssl rand -hex 16`
-2. Open the config `nano /etc/telemt.toml`
-3. Add new users.
+1. Generate the required number of secrets using the command: `openssl rand -hex 16`.
+2. Open the configuration file: `nano /etc/telemt/telemt.toml`.
+3. Add new users to the `[access.users]` section:
 ```toml
 [access.users]
 user1 = "00000000000000000000000000000001"
 user2 = "00000000000000000000000000000002"
 user3 = "00000000000000000000000000000003"
 ```
-4. Save the config. Ctrl+S -> Ctrl+X. You don't need to restart telemt.
-5. Get the links via
+4. Save the configuration (Ctrl+S -> Ctrl+X). There is no need to restart the telemt service.
+5. Get the ready-to-use links using the command:
 ```bash
 curl -s http://127.0.0.1:9091/v1/users | jq
 ```
 
-## "Unknown TLS SNI" Error
-You probably updated tls_domain, but users are still connecting via old links with the previous domain.
+## "Unknown TLS SNI" error
+Usually, this error occurs if you have changed the `tls_domain` parameter, but users continue to connect using old links with the previous domain.
+
+If you need to allow connections with any domains (ignoring SNI mismatches), add the following parameters:
+```toml
+[censorship]
+unknown_sni_action = "mask"
+```
 
 ## How to view metrics
 
-1. Open the config `nano /etc/telemt/telemt.toml`
-2. Add the following parameters
+1. Open the configuration file: `nano /etc/telemt/telemt.toml`.
+2. Add the following parameters:
 ```toml
 [server]
 metrics_port = 9090
 metrics_whitelist = ["127.0.0.1/32", "::1/128", "0.0.0.0/0"]
 ```
-3. Save the config. Ctrl+S -> Ctrl+X.
-4. Metrics are available at SERVER_IP:9090/metrics.
+3. Save the changes (Ctrl+S -> Ctrl+X).
+4. After that, metrics will be available at: `SERVER_IP:9090/metrics`. 
 > [!WARNING]
-> "0.0.0.0/0" in metrics_whitelist opens access from any IP. Replace with your own IP. For example "1.2.3.4"
+> The value `"0.0.0.0/0"` in `metrics_whitelist` opens access to metrics from any IP address. It is recommended to replace it with your personal IP, for example: `"1.2.3.4/32"`.
 
 ## Additional parameters
 
-### Domain in link instead of IP
-To specify a domain in the links, add to the `[general.links]` section of the config file.
+### Domain in the link instead of IP
+To display a domain instead of an IP address in the connection links, add the following lines to the configuration file:
 ```toml
 [general.links]
 public_host = "proxy.example.com"
 ```
 
-### Server connection limit
-Limits the total number of open connections to the server:
+### Total server connection limit
+This parameter limits the total number of active connections to the server:
 ```toml
 [server]
 max_connections = 10000    # 0 - unlimited, 10000 - default
 ```
 
 ### Upstream Manager
-To specify an upstream, add to the `[[upstreams]]` section of the config.toml file:
-#### Binding to IP
+To configure outbound connections (upstreams), add the corresponding parameters to the `[[upstreams]]` section of the configuration file:
+
+#### Binding to an outbound IP address
 ```toml
 [[upstreams]]
 type = "direct"
 weight = 1
 enabled = true
-interface = "192.168.1.100" # Change to your outgoing IP
+interface = "192.168.1.100" # Replace with your outbound IP
 ```
-#### SOCKS4/5 as Upstream
-- Without authentication:
+
+#### Using SOCKS4/5 as an Upstream
+- Without authorization:
 ```toml
 [[upstreams]]
 type = "socks5"            # Specify SOCKS4 or SOCKS5
@@ -116,7 +125,7 @@ weight = 1                 # Set Weight for Scenarios
 enabled = true
 ```
 
-- With authentication:
+- With authorization:
 ```toml
 [[upstreams]]
 type = "socks5"            # Specify SOCKS4 or SOCKS5
@@ -127,8 +136,8 @@ weight = 1                 # Set Weight for Scenarios
 enabled = true
 ```
 
-#### Shadowsocks as Upstream
-Requires `use_middle_proxy = false`.
+#### Using Shadowsocks as an Upstream
+For this method to work, the `use_middle_proxy = false` parameter must be set.
 
 ```toml
 [general]

docs/FAQ.ru.md

@@ -1,32 +1,32 @@
 ## Как настроить канал "спонсор прокси" и статистику через бота @MTProxybot
 
-1. Зайти в бота @MTProxybot.
-2. Ввести команду `/newproxy`
-3. Отправить IP и порт сервера. Например: 1.2.3.4:443
-4. Открыть конфиг `nano /etc/telemt/telemt.toml`.
-5. Скопировать и отправить боту секрет пользователя из раздела [access.users].
-6. Скопировать полученный tag у бота. Например 1234567890abcdef1234567890abcdef.
+1. Зайдите в бота @MTProxybot.
+2. Введите команду `/newproxy`.
+3. Отправьте IP-адрес и порт сервера. Например: `1.2.3.4:443`.
+4. Откройте файл конфигурации: `nano /etc/telemt/telemt.toml`.
+5. Скопируйте и отправьте боту секрет пользователя из раздела `[access.users]`.
+6. Скопируйте тег (tag), который выдаст бот. Например: `1234567890abcdef1234567890abcdef`.
 > [!WARNING]
-> Ссылка, которую выдает бот, не будет работать. Не копируйте и не используйте её!
-7. Раскомментировать параметр ad_tag и вписать tag, полученный у бота.
-8. Раскомментировать/добавить параметр use_middle_proxy = true.
+> Ссылка, которую выдает бот, работать не будет. Не копируйте и не используйте её!
+7. Раскомментируйте параметр `ad_tag` и впишите тег, полученный от бота.
+8. Раскомментируйте или добавьте параметр `use_middle_proxy = true`.
 
-Пример конфига:
+Пример конфигурации:
 ```toml
 [general]
 ad_tag = "1234567890abcdef1234567890abcdef"
 use_middle_proxy = true
 ```
-9.  Сохранить конфиг. Ctrl+S -> Ctrl+X.
-10. Перезапустить telemt `systemctl restart telemt`.
-11. В боте отправить команду /myproxies и выбрать добавленный сервер.
-12. Нажать кнопку "Set promotion".
-13. Отправить **публичную ссылку** на канал. Приватный канал добавить нельзя!
-14. Подождать примерно 1 час, пока информация обновится на серверах Telegram.
+9. Сохраните изменения (в nano: Ctrl+S -> Ctrl+X).
+10. Перезапустите службу telemt: `systemctl restart telemt`.
+11. В боте отправьте команду `/myproxies` и выберите добавленный сервер.
+12. Нажмите кнопку «Set promotion».
+13. Отправьте **публичную ссылку** на канал. Приватные каналы добавлять нельзя!
+14. Подождите примерно 1 час, пока информация обновится на серверах Telegram.
 > [!WARNING]
-> У вас не будет отображаться "спонсор прокси" если вы уже подписаны на канал.
+> Спонсорский канал не будет у вас отображаться, если вы уже на него подписаны.
 
-**Также вы можете настроить разные каналы для разных пользователей.**
+**Вы также можете настроить разные спонсорские каналы для разных пользователей:**
 ```toml
 [access.user_ad_tags]
 hello = "ad_tag"
@@ -37,77 +37,85 @@ hello2 = "ad_tag2"
 https://github.com/telemt/telemt/discussions/167
 
 
-## Сколько человек может пользоваться 1 ссылкой
+## Сколько человек может пользоваться одной ссылкой
 
-По умолчанию 1 ссылкой может пользоваться сколько угодно человек.  
-Вы можете ограничить число IP, использующих прокси.
+По умолчанию одной ссылкой может пользоваться неограниченное число людей.  
+Однако вы можете ограничить количество уникальных IP-адресов для каждого пользователя:
 ```toml
 [access.user_max_unique_ips]
 hello = 1
 ```
-Этот параметр ограничивает, сколько уникальных IP может использовать 1 ссылку одновременно. Если один пользователь отключится, второй сможет подключиться. Также с одного IP может сидеть несколько пользователей.
+Этот параметр задает максимальное количество уникальных IP-адресов, с которых можно одновременно использовать одну ссылку. Если первый пользователь отключится, второй сможет подключиться. При этом с одного IP-адреса могут подключаться несколько пользователей одновременно (например, устройства в одной Wi-Fi сети).
 
-## Как сделать несколько разных ссылок
+## Как создать несколько разных ссылок
 
-1. Сгенерируйте нужное число секретов `openssl rand -hex 16`
-2. Открыть конфиг `nano /etc/telemt.toml`
-3. Добавить новых пользователей.
+1. Сгенерируйте необходимое количество секретов с помощью команды: `openssl rand -hex 16`.
+2. Откройте файл конфигурации: `nano /etc/telemt/telemt.toml`.
+3. Добавьте новых пользователей в секцию `[access.users]`:
 ```toml
 [access.users]
 user1 = "00000000000000000000000000000001"
 user2 = "00000000000000000000000000000002"
 user3 = "00000000000000000000000000000003"
 ```
-4. Сохранить конфиг. Ctrl+S -> Ctrl+X. Перезапускать telemt не нужно.
-5. Получить ссылки через
+4. Сохраните конфигурацию (Ctrl+S -> Ctrl+X). Перезапускать службу telemt не нужно.
+5. Получите готовые ссылки с помощью команды:
 ```bash
 curl -s http://127.0.0.1:9091/v1/users | jq
 ```
 
 ## Ошибка "Unknown TLS SNI"
-Возможно, вы обновили tls_domain, но пользователи всё ещё пытаются подключаться по старым ссылкам с прежним доменом.
+Обычно эта ошибка возникает, если вы изменили параметр `tls_domain`, но пользователи продолжают подключаться по старым ссылкам с прежним доменом.
+
+Если необходимо разрешить подключение с любыми доменами (игнорируя несовпадения SNI), добавьте следующие параметры:
+```toml
+[censorship]
+unknown_sni_action = "mask"
+```
 
 ## Как посмотреть метрики
 
-1. Открыть конфиг `nano /etc/telemt/telemt.toml`
-2. Добавить следующие параметры
+1. Откройте файл конфигурации: `nano /etc/telemt/telemt.toml`.
+2. Добавьте следующие параметры:
 ```toml
 [server]
 metrics_port = 9090
 metrics_whitelist = ["127.0.0.1/32", "::1/128", "0.0.0.0/0"]
 ```
-3. Сохранить конфиг. Ctrl+S -> Ctrl+X.
-4. Метрики доступны по адресу SERVER_IP:9090/metrics. 
+3. Сохраните изменения (Ctrl+S -> Ctrl+X).
+4. После этого метрики будут доступны по адресу: `SERVER_IP:9090/metrics`. 
 > [!WARNING]
-> "0.0.0.0/0" в metrics_whitelist открывает доступ с любого IP. Замените на свой ip. Например "1.2.3.4"
+> Значение `"0.0.0.0/0"` в `metrics_whitelist` открывает доступ к метрикам с любого IP-адреса. Рекомендуется заменить его на ваш личный IP, например: `"1.2.3.4/32"`.
 
 ## Дополнительные параметры
 
 ### Домен в ссылке вместо IP
-Чтобы указать домен в ссылках, добавьте в секцию `[general.links]` файла config.
+Чтобы в ссылках для подключения отображался домен вместо IP-адреса, добавьте следующие строки в файл конфигурации:
 ```toml
 [general.links]
 public_host = "proxy.example.com"
 ```
 
 ### Общий лимит подключений к серверу
-Ограничивает общее число открытых подключений к серверу:
+Этот параметр ограничивает общее количество активных подключений к серверу:
 ```toml
 [server]
-max_connections = 10000    # 0 - unlimited, 10000 - default
+max_connections = 10000    # 0 - без ограничений, 10000 - по умолчанию
 ```
 
 ### Upstream Manager
-Чтобы указать апстрим, добавьте в секцию `[[upstreams]]` файла config.toml:
-#### Привязка к IP
+Для настройки исходящих подключений (апстримов) добавьте соответствующие параметры в секцию `[[upstreams]]` файла конфигурации:
+
+#### Привязка к исходящему IP-адресу
 ```toml
 [[upstreams]]
 type = "direct"
 weight = 1
 enabled = true
-interface = "192.168.1.100" # Change to your outgoing IP
+interface = "192.168.1.100" # Замените на ваш исходящий IP
 ```
-#### SOCKS4/5 как Upstream
+
+#### Использование SOCKS4/5 в качестве Upstream
 - Без авторизации:
 ```toml
 [[upstreams]]
@@ -128,8 +136,8 @@ weight = 1                 # Set Weight for Scenarios
 enabled = true
 ```
 
-#### Shadowsocks как Upstream
-Требует `use_middle_proxy = false`.
+#### Использование Shadowsocks в качестве Upstream
+Для работы этого метода требуется установить параметр `use_middle_proxy = false`.
 
 ```toml
 [general]

src/api/mod.rs

@@ -37,12 +37,12 @@ mod runtime_watch;
 mod runtime_zero;
 mod users;
 
-use config_store::{current_revision, parse_if_match};
+use config_store::{current_revision, load_config_from_disk, parse_if_match};
 use events::ApiEventStore;
 use http_utils::{error_response, read_json, read_optional_json, success_response};
 use model::{
-    ApiFailure, CreateUserRequest, HealthData, PatchUserRequest, RotateSecretRequest, SummaryData,
-    UserActiveIps,
+    ApiFailure, CreateUserRequest, DeleteUserResponse, HealthData, PatchUserRequest,
+    RotateSecretRequest, SummaryData, UserActiveIps,
 };
 use runtime_edge::{
     EdgeConnectionsCacheEntry, build_runtime_connections_summary_data,
@@ -370,20 +370,26 @@ async fn handle(
                 let mut data: Vec<UserActiveIps> = active_ips_map
                     .into_iter()
                     .filter(|(_, ips)| !ips.is_empty())
-                    .map(|(username, active_ips)| UserActiveIps { username, active_ips })
+                    .map(|(username, active_ips)| UserActiveIps {
+                        username,
+                        active_ips,
+                    })
                     .collect();
                 data.sort_by(|a, b| a.username.cmp(&b.username));
                 Ok(success_response(StatusCode::OK, data, revision))
             }
             ("GET", "/v1/stats/users") | ("GET", "/v1/users") => {
                 let revision = current_revision(&shared.config_path).await?;
+                let disk_cfg = load_config_from_disk(&shared.config_path).await?;
+                let runtime_cfg = config_rx.borrow().clone();
                 let (detected_ip_v4, detected_ip_v6) = shared.detected_link_ips();
                 let users = users_from_config(
-                    &cfg,
+                    &disk_cfg,
                     &shared.stats,
                     &shared.ip_tracker,
                     detected_ip_v4,
                     detected_ip_v6,
+                    Some(runtime_cfg.as_ref()),
                 )
                 .await;
                 Ok(success_response(StatusCode::OK, users, revision))
@@ -402,7 +408,7 @@ async fn handle(
                 let expected_revision = parse_if_match(req.headers());
                 let body = read_json::<CreateUserRequest>(req.into_body(), body_limit).await?;
                 let result = create_user(body, expected_revision, &shared).await;
-                let (data, revision) = match result {
+                let (mut data, revision) = match result {
                     Ok(ok) => ok,
                     Err(error) => {
                         shared
@@ -411,11 +417,18 @@ async fn handle(
                         return Err(error);
                     }
                 };
+                let runtime_cfg = config_rx.borrow().clone();
+                data.user.in_runtime = runtime_cfg.access.users.contains_key(&data.user.username);
                 shared.runtime_events.record(
                     "api.user.create.ok",
                     format!("username={}", data.user.username),
                 );
-                Ok(success_response(StatusCode::CREATED, data, revision))
+                let status = if data.user.in_runtime {
+                    StatusCode::CREATED
+                } else {
+                    StatusCode::ACCEPTED
+                };
+                Ok(success_response(status, data, revision))
             }
             _ => {
                 if let Some(user) = path.strip_prefix("/v1/users/")
@@ -424,13 +437,16 @@ async fn handle(
                 {
                     if method == Method::GET {
                         let revision = current_revision(&shared.config_path).await?;
+                        let disk_cfg = load_config_from_disk(&shared.config_path).await?;
+                        let runtime_cfg = config_rx.borrow().clone();
                         let (detected_ip_v4, detected_ip_v6) = shared.detected_link_ips();
                         let users = users_from_config(
-                            &cfg,
+                            &disk_cfg,
                             &shared.stats,
                             &shared.ip_tracker,
                             detected_ip_v4,
                             detected_ip_v6,
+                            Some(runtime_cfg.as_ref()),
                         )
                         .await;
                         if let Some(user_info) =
@@ -458,7 +474,7 @@ async fn handle(
                         let body =
                             read_json::<PatchUserRequest>(req.into_body(), body_limit).await?;
                         let result = patch_user(user, body, expected_revision, &shared).await;
-                        let (data, revision) = match result {
+                        let (mut data, revision) = match result {
                             Ok(ok) => ok,
                             Err(error) => {
                                 shared.runtime_events.record(
@@ -468,10 +484,17 @@ async fn handle(
                                 return Err(error);
                             }
                         };
+                        let runtime_cfg = config_rx.borrow().clone();
+                        data.in_runtime = runtime_cfg.access.users.contains_key(&data.username);
                         shared
                             .runtime_events
                             .record("api.user.patch.ok", format!("username={}", data.username));
-                        return Ok(success_response(StatusCode::OK, data, revision));
+                        let status = if data.in_runtime {
+                            StatusCode::OK
+                        } else {
+                            StatusCode::ACCEPTED
+                        };
+                        return Ok(success_response(status, data, revision));
                     }
                     if method == Method::DELETE {
                         if api_cfg.read_only {
@@ -499,7 +522,18 @@ async fn handle(
                         shared
                             .runtime_events
                             .record("api.user.delete.ok", format!("username={}", deleted_user));
-                        return Ok(success_response(StatusCode::OK, deleted_user, revision));
+                        let runtime_cfg = config_rx.borrow().clone();
+                        let in_runtime = runtime_cfg.access.users.contains_key(&deleted_user);
+                        let response = DeleteUserResponse {
+                            username: deleted_user,
+                            in_runtime,
+                        };
+                        let status = if response.in_runtime {
+                            StatusCode::ACCEPTED
+                        } else {
+                            StatusCode::OK
+                        };
+                        return Ok(success_response(status, response, revision));
                     }
                     if method == Method::POST
                         && let Some(base_user) = user.strip_suffix("/rotate-secret")
@@ -527,7 +561,7 @@ async fn handle(
                             &shared,
                         )
                         .await;
-                        let (data, revision) = match result {
+                        let (mut data, revision) = match result {
                             Ok(ok) => ok,
                             Err(error) => {
                                 shared.runtime_events.record(
@@ -537,11 +571,19 @@ async fn handle(
                                 return Err(error);
                             }
                         };
+                        let runtime_cfg = config_rx.borrow().clone();
+                        data.user.in_runtime =
+                            runtime_cfg.access.users.contains_key(&data.user.username);
                         shared.runtime_events.record(
                             "api.user.rotate_secret.ok",
                             format!("username={}", base_user),
                         );
-                        return Ok(success_response(StatusCode::OK, data, revision));
+                        let status = if data.user.in_runtime {
+                            StatusCode::OK
+                        } else {
+                            StatusCode::ACCEPTED
+                        };
+                        return Ok(success_response(status, data, revision));
                     }
                     if method == Method::POST {
                         return Ok(error_response(

src/api/model.rs

@@ -428,6 +428,7 @@ pub(super) struct UserLinks {
 #[derive(Serialize)]
 pub(super) struct UserInfo {
     pub(super) username: String,
+    pub(super) in_runtime: bool,
     pub(super) user_ad_tag: Option<String>,
     pub(super) max_tcp_conns: Option<usize>,
     pub(super) expiration_rfc3339: Option<String>,
@@ -454,6 +455,12 @@ pub(super) struct CreateUserResponse {
     pub(super) secret: String,
 }
 
+#[derive(Serialize)]
+pub(super) struct DeleteUserResponse {
+    pub(super) username: String,
+    pub(super) in_runtime: bool,
+}
+
 #[derive(Deserialize)]
 pub(super) struct CreateUserRequest {
     pub(super) username: String,

src/api/runtime_zero.rs

@@ -100,6 +100,11 @@ pub(super) struct EffectiveUserIpPolicyLimits {
     pub(super) window_secs: u64,
 }
 
+#[derive(Serialize)]
+pub(super) struct EffectiveUserTcpPolicyLimits {
+    pub(super) global_each: usize,
+}
+
 #[derive(Serialize)]
 pub(super) struct EffectiveLimitsData {
     pub(super) update_every_secs: u64,
@@ -109,6 +114,7 @@ pub(super) struct EffectiveLimitsData {
     pub(super) upstream: EffectiveUpstreamLimits,
     pub(super) middle_proxy: EffectiveMiddleProxyLimits,
     pub(super) user_ip_policy: EffectiveUserIpPolicyLimits,
+    pub(super) user_tcp_policy: EffectiveUserTcpPolicyLimits,
 }
 
 #[derive(Serialize)]
@@ -289,6 +295,9 @@ pub(super) fn build_limits_effective_data(cfg: &ProxyConfig) -> EffectiveLimitsD
             mode: user_max_unique_ips_mode_label(cfg.access.user_max_unique_ips_mode),
             window_secs: cfg.access.user_max_unique_ips_window_secs,
         },
+        user_tcp_policy: EffectiveUserTcpPolicyLimits {
+            global_each: cfg.access.user_max_tcp_conns_global_each,
+        },
     }
 }
 

src/api/users.rs

@@ -136,6 +136,7 @@ pub(super) async fn create_user(
         &shared.ip_tracker,
         detected_ip_v4,
         detected_ip_v6,
+        None,
     )
     .await;
     let user = users
@@ -143,8 +144,16 @@ pub(super) async fn create_user(
         .find(|entry| entry.username == body.username)
         .unwrap_or(UserInfo {
             username: body.username.clone(),
+            in_runtime: false,
             user_ad_tag: None,
-            max_tcp_conns: None,
+            max_tcp_conns: cfg
+                .access
+                .user_max_tcp_conns
+                .get(&body.username)
+                .copied()
+                .filter(|limit| *limit > 0)
+                .or((cfg.access.user_max_tcp_conns_global_each > 0)
+                    .then_some(cfg.access.user_max_tcp_conns_global_each)),
             expiration_rfc3339: None,
             data_quota_bytes: None,
             max_unique_ips: updated_limit,
@@ -236,6 +245,7 @@ pub(super) async fn patch_user(
         &shared.ip_tracker,
         detected_ip_v4,
         detected_ip_v6,
+        None,
     )
     .await;
     let user_info = users
@@ -293,6 +303,7 @@ pub(super) async fn rotate_secret(
         &shared.ip_tracker,
         detected_ip_v4,
         detected_ip_v6,
+        None,
     )
     .await;
     let user_info = users
@@ -365,6 +376,7 @@ pub(super) async fn users_from_config(
     ip_tracker: &UserIpTracker,
     startup_detected_ip_v4: Option<IpAddr>,
     startup_detected_ip_v6: Option<IpAddr>,
+    runtime_cfg: Option<&ProxyConfig>,
 ) -> Vec<UserInfo> {
     let mut names = cfg.access.users.keys().cloned().collect::<Vec<_>>();
     names.sort();
@@ -394,8 +406,18 @@ pub(super) async fn users_from_config(
                 tls: Vec::new(),
             });
         users.push(UserInfo {
+            in_runtime: runtime_cfg
+                .map(|runtime| runtime.access.users.contains_key(&username))
+                .unwrap_or(false),
             user_ad_tag: cfg.access.user_ad_tags.get(&username).cloned(),
-            max_tcp_conns: cfg.access.user_max_tcp_conns.get(&username).copied(),
+            max_tcp_conns: cfg
+                .access
+                .user_max_tcp_conns
+                .get(&username)
+                .copied()
+                .filter(|limit| *limit > 0)
+                .or((cfg.access.user_max_tcp_conns_global_each > 0)
+                    .then_some(cfg.access.user_max_tcp_conns_global_each)),
             expiration_rfc3339: cfg
                 .access
                 .user_expirations
@@ -572,3 +594,94 @@ fn resolve_tls_domains(cfg: &ProxyConfig) -> Vec<&str> {
     }
     domains
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::ip_tracker::UserIpTracker;
+    use crate::stats::Stats;
+
+    #[tokio::test]
+    async fn users_from_config_reports_effective_tcp_limit_with_global_fallback() {
+        let mut cfg = ProxyConfig::default();
+        cfg.access.users.insert(
+            "alice".to_string(),
+            "0123456789abcdef0123456789abcdef".to_string(),
+        );
+        cfg.access.user_max_tcp_conns_global_each = 7;
+
+        let stats = Stats::new();
+        let tracker = UserIpTracker::new();
+
+        let users = users_from_config(&cfg, &stats, &tracker, None, None, None).await;
+        let alice = users
+            .iter()
+            .find(|entry| entry.username == "alice")
+            .expect("alice must be present");
+        assert!(!alice.in_runtime);
+        assert_eq!(alice.max_tcp_conns, Some(7));
+
+        cfg.access.user_max_tcp_conns.insert("alice".to_string(), 5);
+        let users = users_from_config(&cfg, &stats, &tracker, None, None, None).await;
+        let alice = users
+            .iter()
+            .find(|entry| entry.username == "alice")
+            .expect("alice must be present");
+        assert!(!alice.in_runtime);
+        assert_eq!(alice.max_tcp_conns, Some(5));
+
+        cfg.access.user_max_tcp_conns.insert("alice".to_string(), 0);
+        let users = users_from_config(&cfg, &stats, &tracker, None, None, None).await;
+        let alice = users
+            .iter()
+            .find(|entry| entry.username == "alice")
+            .expect("alice must be present");
+        assert!(!alice.in_runtime);
+        assert_eq!(alice.max_tcp_conns, Some(7));
+
+        cfg.access.user_max_tcp_conns_global_each = 0;
+        let users = users_from_config(&cfg, &stats, &tracker, None, None, None).await;
+        let alice = users
+            .iter()
+            .find(|entry| entry.username == "alice")
+            .expect("alice must be present");
+        assert!(!alice.in_runtime);
+        assert_eq!(alice.max_tcp_conns, None);
+    }
+
+    #[tokio::test]
+    async fn users_from_config_marks_runtime_membership_when_snapshot_is_provided() {
+        let mut disk_cfg = ProxyConfig::default();
+        disk_cfg.access.users.insert(
+            "alice".to_string(),
+            "0123456789abcdef0123456789abcdef".to_string(),
+        );
+        disk_cfg.access.users.insert(
+            "bob".to_string(),
+            "fedcba9876543210fedcba9876543210".to_string(),
+        );
+
+        let mut runtime_cfg = ProxyConfig::default();
+        runtime_cfg.access.users.insert(
+            "alice".to_string(),
+            "0123456789abcdef0123456789abcdef".to_string(),
+        );
+
+        let stats = Stats::new();
+        let tracker = UserIpTracker::new();
+        let users =
+            users_from_config(&disk_cfg, &stats, &tracker, None, None, Some(&runtime_cfg)).await;
+
+        let alice = users
+            .iter()
+            .find(|entry| entry.username == "alice")
+            .expect("alice must be present");
+        let bob = users
+            .iter()
+            .find(|entry| entry.username == "bob")
+            .expect("bob must be present");
+
+        assert!(alice.in_runtime);
+        assert!(!bob.in_runtime);
+    }
+}

src/cli.rs

@@ -13,7 +13,7 @@ use std::path::{Path, PathBuf};
 use std::process::Command;
 
 #[cfg(unix)]
-use crate::daemon::{self, DaemonOptions, DEFAULT_PID_FILE};
+use crate::daemon::{self, DEFAULT_PID_FILE, DaemonOptions};
 
 /// CLI subcommand to execute.
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -437,8 +437,8 @@ pub fn run_init(opts: InitOptions) -> Result<(), Box<dyn std::error::Error>> {
     eprintln!("[+] Config written to {}", config_path.display());
 
     // 5. Generate and write service file
-    let exe_path = std::env::current_exe()
-        .unwrap_or_else(|_| PathBuf::from("/usr/local/bin/telemt"));
+    let exe_path =
+        std::env::current_exe().unwrap_or_else(|_| PathBuf::from("/usr/local/bin/telemt"));
 
     let service_opts = ServiceOptions {
         exe_path: &exe_path,
@@ -623,6 +623,7 @@ fake_cert_len = 2048
 tls_full_cert_ttl_secs = 90
 
 [access]
+user_max_tcp_conns_global_each = 0
 replay_check_len = 65536
 replay_window_secs = 120
 ignore_time_skew = false

src/config/defaults.rs

@@ -811,6 +811,10 @@ pub(crate) fn default_user_max_unique_ips_window_secs() -> u64 {
     DEFAULT_USER_MAX_UNIQUE_IPS_WINDOW_SECS
 }
 
+pub(crate) fn default_user_max_tcp_conns_global_each() -> usize {
+    0
+}
+
 pub(crate) fn default_user_max_unique_ips_global_each() -> usize {
     0
 }

src/config/hot_reload.rs

@@ -117,6 +117,7 @@ pub struct HotFields {
     pub users: std::collections::HashMap<String, String>,
     pub user_ad_tags: std::collections::HashMap<String, String>,
     pub user_max_tcp_conns: std::collections::HashMap<String, usize>,
+    pub user_max_tcp_conns_global_each: usize,
     pub user_expirations: std::collections::HashMap<String, chrono::DateTime<chrono::Utc>>,
     pub user_data_quota: std::collections::HashMap<String, u64>,
     pub user_max_unique_ips: std::collections::HashMap<String, usize>,
@@ -240,6 +241,7 @@ impl HotFields {
             users: cfg.access.users.clone(),
             user_ad_tags: cfg.access.user_ad_tags.clone(),
             user_max_tcp_conns: cfg.access.user_max_tcp_conns.clone(),
+            user_max_tcp_conns_global_each: cfg.access.user_max_tcp_conns_global_each,
             user_expirations: cfg.access.user_expirations.clone(),
             user_data_quota: cfg.access.user_data_quota.clone(),
             user_max_unique_ips: cfg.access.user_max_unique_ips.clone(),
@@ -530,6 +532,7 @@ fn overlay_hot_fields(old: &ProxyConfig, new: &ProxyConfig) -> ProxyConfig {
     cfg.access.users = new.access.users.clone();
     cfg.access.user_ad_tags = new.access.user_ad_tags.clone();
     cfg.access.user_max_tcp_conns = new.access.user_max_tcp_conns.clone();
+    cfg.access.user_max_tcp_conns_global_each = new.access.user_max_tcp_conns_global_each;
     cfg.access.user_expirations = new.access.user_expirations.clone();
     cfg.access.user_data_quota = new.access.user_data_quota.clone();
     cfg.access.user_max_unique_ips = new.access.user_max_unique_ips.clone();
@@ -1145,6 +1148,12 @@ fn log_changes(
             new_hot.user_max_tcp_conns.len()
         );
     }
+    if old_hot.user_max_tcp_conns_global_each != new_hot.user_max_tcp_conns_global_each {
+        info!(
+            "config reload: user_max_tcp_conns policy global_each={}",
+            new_hot.user_max_tcp_conns_global_each
+        );
+    }
     if old_hot.user_expirations != new_hot.user_expirations {
         info!(
             "config reload: user_expirations updated ({} entries)",

src/config/load.rs

@@ -1328,6 +1328,10 @@ mod tests {
             default_api_runtime_edge_events_capacity()
         );
         assert_eq!(cfg.access.users, default_access_users());
+        assert_eq!(
+            cfg.access.user_max_tcp_conns_global_each,
+            default_user_max_tcp_conns_global_each()
+        );
         assert_eq!(
             cfg.access.user_max_unique_ips_mode,
             UserMaxUniqueIpsMode::default()
@@ -1471,6 +1475,10 @@ mod tests {
 
         let access = AccessConfig::default();
         assert_eq!(access.users, default_access_users());
+        assert_eq!(
+            access.user_max_tcp_conns_global_each,
+            default_user_max_tcp_conns_global_each()
+        );
     }
 
     #[test]

src/config/types.rs

@@ -1633,6 +1633,12 @@ pub struct AccessConfig {
     #[serde(default)]
     pub user_max_tcp_conns: HashMap<String, usize>,
 
+    /// Global per-user TCP connection limit applied when a user has no
+    /// positive individual override.
+    /// `0` disables the inherited limit.
+    #[serde(default = "default_user_max_tcp_conns_global_each")]
+    pub user_max_tcp_conns_global_each: usize,
+
     #[serde(default)]
     pub user_expirations: HashMap<String, DateTime<Utc>>,
 
@@ -1669,6 +1675,7 @@ impl Default for AccessConfig {
             users: default_access_users(),
             user_ad_tags: HashMap::new(),
             user_max_tcp_conns: HashMap::new(),
+            user_max_tcp_conns_global_each: default_user_max_tcp_conns_global_each(),
             user_expirations: HashMap::new(),
             user_data_quota: HashMap::new(),
             user_max_unique_ips: HashMap::new(),

src/daemon/mod.rs

@@ -206,7 +206,9 @@ impl PidFile {
         let mut contents = String::new();
         File::open(&self.path)
             .and_then(|mut f| f.read_to_string(&mut contents))
-            .map_err(|e| DaemonError::PidFile(format!("cannot read {}: {}", self.path.display(), e)))?;
+            .map_err(|e| {
+                DaemonError::PidFile(format!("cannot read {}: {}", self.path.display(), e))
+            })?;
 
         let pid: i32 = contents
             .trim()
@@ -269,12 +271,16 @@ impl PidFile {
 
         // Write our PID
         let pid = getpid();
-        let mut file = flock.unlock().map_err(|(_, errno)| {
-            DaemonError::PidFile(format!("unlock failed: {}", errno))
-        })?;
+        let mut file = flock
+            .unlock()
+            .map_err(|(_, errno)| DaemonError::PidFile(format!("unlock failed: {}", errno)))?;
 
         writeln!(file, "{}", pid).map_err(|e| {
-            DaemonError::PidFile(format!("cannot write PID to {}: {}", self.path.display(), e))
+            DaemonError::PidFile(format!(
+                "cannot write PID to {}: {}",
+                self.path.display(),
+                e
+            ))
         })?;
 
         // Re-acquire lock and keep it
@@ -373,7 +379,8 @@ pub fn drop_privileges(user: Option<&str>, group: Option<&str>) -> Result<(), Da
 /// Looks up a user by name and returns their UID.
 fn lookup_user(name: &str) -> Result<Uid, DaemonError> {
     // Use libc getpwnam
-    let c_name = std::ffi::CString::new(name).map_err(|_| DaemonError::UserNotFound(name.to_string()))?;
+    let c_name =
+        std::ffi::CString::new(name).map_err(|_| DaemonError::UserNotFound(name.to_string()))?;
 
     unsafe {
         let pwd = libc::getpwnam(c_name.as_ptr());
@@ -387,7 +394,8 @@ fn lookup_user(name: &str) -> Result<Uid, DaemonError> {
 
 /// Looks up a user's primary GID by username.
 fn lookup_user_primary_gid(name: &str) -> Result<Gid, DaemonError> {
-    let c_name = std::ffi::CString::new(name).map_err(|_| DaemonError::UserNotFound(name.to_string()))?;
+    let c_name =
+        std::ffi::CString::new(name).map_err(|_| DaemonError::UserNotFound(name.to_string()))?;
 
     unsafe {
         let pwd = libc::getpwnam(c_name.as_ptr());
@@ -401,7 +409,8 @@ fn lookup_user_primary_gid(name: &str) -> Result<Gid, DaemonError> {
 
 /// Looks up a group by name and returns its GID.
 fn lookup_group(name: &str) -> Result<Gid, DaemonError> {
-    let c_name = std::ffi::CString::new(name).map_err(|_| DaemonError::GroupNotFound(name.to_string()))?;
+    let c_name =
+        std::ffi::CString::new(name).map_err(|_| DaemonError::GroupNotFound(name.to_string()))?;
 
     unsafe {
         let grp = libc::getgrnam(c_name.as_ptr());
@@ -444,9 +453,8 @@ pub fn signal_pid_file<P: AsRef<Path>>(
         )));
     }
 
-    nix::sys::signal::kill(Pid::from_raw(pid), signal).map_err(|e| {
-        DaemonError::PidFile(format!("cannot signal process {}: {}", pid, e))
-    })?;
+    nix::sys::signal::kill(Pid::from_raw(pid), signal)
+        .map_err(|e| DaemonError::PidFile(format!("cannot signal process {}: {}", pid, e)))?;
 
     Ok(())
 }

src/logging.rs

@@ -63,7 +63,10 @@ impl LoggingGuard {
 pub fn init_logging(
     opts: &LoggingOptions,
     initial_filter: &str,
-) -> (reload::Handle<EnvFilter, impl tracing::Subscriber + Send + Sync>, LoggingGuard) {
+) -> (
+    reload::Handle<EnvFilter, impl tracing::Subscriber + Send + Sync>,
+    LoggingGuard,
+) {
     let (filter_layer, filter_handle) = reload::Layer::new(EnvFilter::new(initial_filter));
 
     match &opts.destination {
@@ -101,7 +104,8 @@ pub fn init_logging(
                 // Extract directory and filename prefix
                 let path = Path::new(path);
                 let dir = path.parent().unwrap_or(Path::new("/var/log"));
-                let prefix = path.file_name()
+                let prefix = path
+                    .file_name()
                     .and_then(|s| s.to_str())
                     .unwrap_or("telemt");
 
@@ -182,7 +186,11 @@ impl std::io::Write for SyslogWriter {
             .unwrap_or_else(|_| std::ffi::CString::new("(invalid utf8)").unwrap());
 
         unsafe {
-            libc::syslog(priority, b"%s\0".as_ptr() as *const libc::c_char, c_msg.as_ptr());
+            libc::syslog(
+                priority,
+                b"%s\0".as_ptr() as *const libc::c_char,
+                c_msg.as_ptr(),
+            );
         }
 
         Ok(buf.len())
@@ -255,7 +263,10 @@ mod tests {
     #[test]
     fn test_parse_log_destination_default() {
         let args: Vec<String> = vec![];
-        assert!(matches!(parse_log_destination(&args), LogDestination::Stderr));
+        assert!(matches!(
+            parse_log_destination(&args),
+            LogDestination::Stderr
+        ));
     }
 
     #[test]
@@ -286,6 +297,9 @@ mod tests {
     #[test]
     fn test_parse_log_destination_syslog() {
         let args = vec!["--syslog".to_string()];
-        assert!(matches!(parse_log_destination(&args), LogDestination::Syslog));
+        assert!(matches!(
+            parse_log_destination(&args),
+            LogDestination::Syslog
+        ));
     }
 }

src/maestro/helpers.rs

@@ -149,7 +149,9 @@ fn print_help() {
     }
     eprintln!();
     eprintln!("Options:");
-    eprintln!("  --data-path <DIR>       Set data directory (absolute path; overrides config value)");
+    eprintln!(
+        "  --data-path <DIR>       Set data directory (absolute path; overrides config value)"
+    );
     eprintln!("  --silent, -s            Suppress info logs");
     eprintln!("  --log-level <LEVEL>     debug|verbose|normal|silent");
     eprintln!("  --help, -h              Show this help");
@@ -173,16 +175,10 @@ fn print_help() {
         eprintln!();
     }
     eprintln!("Setup (fire-and-forget):");
-    eprintln!(
-        "  --init                  Generate config, install systemd service, start"
-    );
+    eprintln!("  --init                  Generate config, install systemd service, start");
     eprintln!("    --port <PORT>          Listen port (default: 443)");
-    eprintln!(
-        "    --domain <DOMAIN>      TLS domain for masking (default: www.google.com)"
-    );
-    eprintln!(
-        "    --secret <HEX>         32-char hex secret (auto-generated if omitted)"
-    );
+    eprintln!("    --domain <DOMAIN>      TLS domain for masking (default: www.google.com)");
+    eprintln!("    --secret <HEX>         32-char hex secret (auto-generated if omitted)");
     eprintln!("    --user <NAME>          Username (default: user)");
     eprintln!("    --config-dir <DIR>     Config directory (default: /etc/telemt)");
     eprintln!("    --no-start             Don't start the service after install");

src/maestro/mod.rs

@@ -83,7 +83,6 @@ pub async fn run() -> std::result::Result<(), Box<dyn std::error::Error>> {
 async fn run_inner(
     daemon_opts: DaemonOptions,
 ) -> std::result::Result<(), Box<dyn std::error::Error>> {
-
     // Acquire PID file if daemonizing or if explicitly requested
     // Keep it alive until shutdown (underscore prefix = intentionally kept for RAII cleanup)
     let _pid_file = if daemon_opts.daemonize || daemon_opts.pid_file.is_some() {
@@ -665,10 +664,7 @@ async fn run_inner(
 
     // Drop privileges after binding sockets (which may require root for port < 1024)
     if daemon_opts.user.is_some() || daemon_opts.group.is_some() {
-        if let Err(e) = drop_privileges(
-            daemon_opts.user.as_deref(),
-            daemon_opts.group.as_deref(),
-        ) {
+        if let Err(e) = drop_privileges(daemon_opts.user.as_deref(), daemon_opts.group.as_deref()) {
             error!(error = %e, "Failed to drop privileges");
             std::process::exit(1);
         }

src/maestro/shutdown.rs

@@ -11,10 +11,10 @@
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 
-#[cfg(unix)]
-use tokio::signal::unix::{SignalKind, signal};
 #[cfg(not(unix))]
 use tokio::signal;
+#[cfg(unix)]
+use tokio::signal::unix::{SignalKind, signal};
 use tracing::{info, warn};
 
 use crate::stats::Stats;
@@ -94,7 +94,8 @@ async fn perform_shutdown(
 
     // Graceful ME pool shutdown
     if let Some(pool) = &me_pool {
-        match tokio::time::timeout(Duration::from_secs(2), pool.shutdown_send_close_conn_all()).await
+        match tokio::time::timeout(Duration::from_secs(2), pool.shutdown_send_close_conn_all())
+            .await
         {
             Ok(total) => {
                 info!(
@@ -159,15 +160,12 @@ fn dump_stats(stats: &Stats, process_started_at: Instant) {
 /// - SIGUSR1: Log rotation acknowledgment (for external log rotation tools)
 /// - SIGUSR2: Dump runtime status to log
 #[cfg(unix)]
-pub(crate) fn spawn_signal_handlers(
-    stats: Arc<Stats>,
-    process_started_at: Instant,
-) {
+pub(crate) fn spawn_signal_handlers(stats: Arc<Stats>, process_started_at: Instant) {
     tokio::spawn(async move {
-        let mut sigusr1 = signal(SignalKind::user_defined1())
-            .expect("Failed to register SIGUSR1 handler");
-        let mut sigusr2 = signal(SignalKind::user_defined2())
-            .expect("Failed to register SIGUSR2 handler");
+        let mut sigusr1 =
+            signal(SignalKind::user_defined1()).expect("Failed to register SIGUSR1 handler");
+        let mut sigusr2 =
+            signal(SignalKind::user_defined2()).expect("Failed to register SIGUSR2 handler");
 
         loop {
             tokio::select! {
@@ -184,10 +182,7 @@ pub(crate) fn spawn_signal_handlers(
 
 /// No-op on non-Unix platforms.
 #[cfg(not(unix))]
-pub(crate) fn spawn_signal_handlers(
-    _stats: Arc<Stats>,
-    _process_started_at: Instant,
-) {
+pub(crate) fn spawn_signal_handlers(_stats: Arc<Stats>, _process_started_at: Instant) {
     // No SIGUSR1/SIGUSR2 on non-Unix
 }
 

src/main.rs

@@ -8,8 +8,6 @@ mod crypto;
 mod daemon;
 mod error;
 mod ip_tracker;
-mod logging;
-mod service;
 #[cfg(test)]
 #[path = "tests/ip_tracker_encapsulation_adversarial_tests.rs"]
 mod ip_tracker_encapsulation_adversarial_tests;
@@ -19,11 +17,13 @@ mod ip_tracker_hotpath_adversarial_tests;
 #[cfg(test)]
 #[path = "tests/ip_tracker_regression_tests.rs"]
 mod ip_tracker_regression_tests;
+mod logging;
 mod maestro;
 mod metrics;
 mod network;
 mod protocol;
 mod proxy;
+mod service;
 mod startup;
 mod stats;
 mod stream;

src/proxy/client.rs

@@ -877,7 +877,8 @@ impl RunningClientHandler {
         let first_byte = if self.config.timeouts.client_first_byte_idle_secs == 0 {
             None
         } else {
-            let idle_timeout = Duration::from_secs(self.config.timeouts.client_first_byte_idle_secs);
+            let idle_timeout =
+                Duration::from_secs(self.config.timeouts.client_first_byte_idle_secs);
             let mut first_byte = [0u8; 1];
             match timeout(idle_timeout, self.stream.read(&mut first_byte)).await {
                 Ok(Ok(0)) => {
@@ -1365,7 +1366,11 @@ impl RunningClientHandler {
             .access
             .user_max_tcp_conns
             .get(user)
-            .map(|v| *v as u64);
+            .copied()
+            .filter(|limit| *limit > 0)
+            .or((config.access.user_max_tcp_conns_global_each > 0)
+                .then_some(config.access.user_max_tcp_conns_global_each))
+            .map(|v| v as u64);
         if !stats.try_acquire_user_curr_connects(user, limit) {
             return Err(ProxyError::ConnectionLimitExceeded {
                 user: user.to_string(),
@@ -1424,7 +1429,11 @@ impl RunningClientHandler {
             .access
             .user_max_tcp_conns
             .get(user)
-            .map(|v| *v as u64);
+            .copied()
+            .filter(|limit| *limit > 0)
+            .or((config.access.user_max_tcp_conns_global_each > 0)
+                .then_some(config.access.user_max_tcp_conns_global_each))
+            .map(|v| v as u64);
         if !stats.try_acquire_user_curr_connects(user, limit) {
             return Err(ProxyError::ConnectionLimitExceeded {
                 user: user.to_string(),

src/proxy/tests/client_security_tests.rs

@@ -1740,7 +1740,8 @@ async fn fragmented_tls_mtproto_with_interleaved_ccs_is_accepted() {
         .await
         .unwrap();
     assert_eq!(tls_response_head[0], 0x16);
-    let tls_response_len = u16::from_be_bytes([tls_response_head[3], tls_response_head[4]]) as usize;
+    let tls_response_len =
+        u16::from_be_bytes([tls_response_head[3], tls_response_head[4]]) as usize;
     let mut tls_response_body = vec![0u8; tls_response_len];
     client_side
         .read_exact(&mut tls_response_body)
@@ -2533,14 +2534,16 @@ async fn tcp_limit_rejection_does_not_reserve_ip_or_trigger_rollback() {
 }
 
 #[tokio::test]
-async fn zero_tcp_limit_rejects_without_ip_or_counter_side_effects() {
+async fn zero_tcp_limit_uses_global_fallback_and_rejects_without_side_effects() {
     let mut config = ProxyConfig::default();
     config
         .access
         .user_max_tcp_conns
         .insert("user".to_string(), 0);
+    config.access.user_max_tcp_conns_global_each = 1;
 
     let stats = Stats::new();
+    stats.increment_user_curr_connects("user");
     let ip_tracker = UserIpTracker::new();
     let peer_addr: SocketAddr = "198.51.100.211:50001".parse().unwrap();
 
@@ -2557,10 +2560,75 @@ async fn zero_tcp_limit_rejects_without_ip_or_counter_side_effects() {
         result,
         Err(ProxyError::ConnectionLimitExceeded { user }) if user == "user"
     ));
+    assert_eq!(
+        stats.get_user_curr_connects("user"),
+        1,
+        "TCP-limit rejection must keep pre-existing in-flight connection count unchanged"
+    );
+    assert_eq!(ip_tracker.get_active_ip_count("user").await, 0);
+}
+
+#[tokio::test]
+async fn zero_tcp_limit_with_disabled_global_fallback_is_unlimited() {
+    let mut config = ProxyConfig::default();
+    config
+        .access
+        .user_max_tcp_conns
+        .insert("user".to_string(), 0);
+    config.access.user_max_tcp_conns_global_each = 0;
+
+    let stats = Stats::new();
+    let ip_tracker = UserIpTracker::new();
+    let peer_addr: SocketAddr = "198.51.100.212:50002".parse().unwrap();
+
+    let result = RunningClientHandler::check_user_limits_static(
+        "user",
+        &config,
+        &stats,
+        peer_addr,
+        &ip_tracker,
+    )
+    .await;
+
+    assert!(
+        result.is_ok(),
+        "per-user zero with global fallback disabled must not enforce a TCP limit"
+    );
     assert_eq!(stats.get_user_curr_connects("user"), 0);
     assert_eq!(ip_tracker.get_active_ip_count("user").await, 0);
 }
 
+#[tokio::test]
+async fn global_tcp_fallback_applies_when_per_user_limit_is_missing() {
+    let mut config = ProxyConfig::default();
+    config.access.user_max_tcp_conns_global_each = 1;
+
+    let stats = Stats::new();
+    stats.increment_user_curr_connects("user");
+    let ip_tracker = UserIpTracker::new();
+    let peer_addr: SocketAddr = "198.51.100.213:50003".parse().unwrap();
+
+    let result = RunningClientHandler::check_user_limits_static(
+        "user",
+        &config,
+        &stats,
+        peer_addr,
+        &ip_tracker,
+    )
+    .await;
+
+    assert!(matches!(
+        result,
+        Err(ProxyError::ConnectionLimitExceeded { user }) if user == "user"
+    ));
+    assert_eq!(
+        stats.get_user_curr_connects("user"),
+        1,
+        "Global fallback TCP-limit rejection must keep pre-existing counter unchanged"
+    );
+    assert_eq!(ip_tracker.get_active_ip_count("user").await, 0);
+}
+
 #[tokio::test]
 async fn check_user_limits_static_success_does_not_leak_counter_or_ip_reservation() {
     let user = "check-helper-user";

src/proxy/tests/masking_ab_envelope_blur_integration_security_tests.rs

@@ -562,9 +562,10 @@ async fn timing_classifier_light_fuzz_pairwise_bucketed_accuracy_stays_bounded_u
     if low_info_pair_count > 0 {
         let low_info_baseline_avg = low_info_baseline_sum / low_info_pair_count as f64;
         let low_info_hardened_avg = low_info_hardened_sum / low_info_pair_count as f64;
+        let low_info_avg_jitter_budget = 0.40 + acc_quant_step;
         assert!(
-            low_info_hardened_avg <= low_info_baseline_avg + 0.40,
-            "normalization low-info average drift exceeded jitter budget: baseline_avg={low_info_baseline_avg:.3} hardened_avg={low_info_hardened_avg:.3}"
+            low_info_hardened_avg <= low_info_baseline_avg + low_info_avg_jitter_budget,
+            "normalization low-info average drift exceeded jitter budget: baseline_avg={low_info_baseline_avg:.3} hardened_avg={low_info_hardened_avg:.3} tolerated={low_info_avg_jitter_budget:.3}"
         );
     }
 

src/service/mod.rs

@@ -111,8 +111,14 @@ pub fn generate_service_file(init_system: InitSystem, opts: &ServiceOptions) ->
 /// Generates an enhanced systemd unit file.
 fn generate_systemd_unit(opts: &ServiceOptions) -> String {
     let user_line = opts.user.map(|u| format!("User={}", u)).unwrap_or_default();
-    let group_line = opts.group.map(|g| format!("Group={}", g)).unwrap_or_default();
-    let working_dir = opts.working_dir.map(|d| format!("WorkingDirectory={}", d)).unwrap_or_default();
+    let group_line = opts
+        .group
+        .map(|g| format!("Group={}", g))
+        .unwrap_or_default();
+    let working_dir = opts
+        .working_dir
+        .map(|d| format!("WorkingDirectory={}", d))
+        .unwrap_or_default();
 
     format!(
         r#"[Unit]
@@ -369,8 +375,14 @@ mod tests {
 
     #[test]
     fn test_service_file_paths() {
-        assert_eq!(service_file_path(InitSystem::Systemd), "/etc/systemd/system/telemt.service");
+        assert_eq!(
+            service_file_path(InitSystem::Systemd),
+            "/etc/systemd/system/telemt.service"
+        );
         assert_eq!(service_file_path(InitSystem::OpenRC), "/etc/init.d/telemt");
-        assert_eq!(service_file_path(InitSystem::FreeBSDRc), "/usr/local/etc/rc.d/telemt");
+        assert_eq!(
+            service_file_path(InitSystem::FreeBSDRc),
+            "/usr/local/etc/rc.d/telemt"
+        );
     }
 }