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doc: new features
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fatedier committed Aug 12, 2016
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79 changes: 75 additions & 4 deletions README.md
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Expand Up @@ -17,10 +17,14 @@ frp is a fast reverse proxy to help you expose a local server behind a NAT or fi
* [Communicate with your computer in LAN by SSH](#communicate-with-your-computer-in-lan-by-ssh)
* [Visit your web service in LAN by specific domain](#visit-your-web-service-in-lan-by-specific-domain)
* [Features](#features)
* [Dashboard](#dashboard)
* [Authentication](#authentication)
* [Encryption and Compression](#encryption-and-compression)
* [Reload configures without frps stopped](#reload-configures-without-frps-stopped)
* [Privilege Mode](#privilege-mode)
* [Port White List](#port-white-list)
* [Connection Pool](#connection-pool)
* [Rewriting the Host Header](#rewriting-the-host-header)
* [Development Plan](#development-plan)
* [Contributing](#contributing)
* [Contributors](#contributors)
Expand Down Expand Up @@ -136,6 +140,21 @@ Howerver, we can expose a http or https service using frp.

## Features

### Dashboard

Check frp's status and proxies's statistics information by Dashboard.

Configure a port for dashboard to enable this feature:

```ini
[common]
dashboard_port = 7500
```

Then visit `http://[server_addr]:7500` to see dashboard.

![dashboard](/doc/pic/dashboard.png)

### Authentication

`auth_token` is used in frps.ini for authentication when frpc login in and you should configure it for each proxy.
Expand Down Expand Up @@ -237,18 +256,70 @@ All proxies's configures are set in frpc.ini when privilege mode is enabled.

`ssh -oPort=6000 [email protected]`

#### Port White List

`privilege_allow_ports` in frps.ini is used for preventing abuse of ports in privilege mode:

```ini
# frps.ini
[common]
privilege_mode = true
privilege_token = 1234
privilege_allow_ports = 2000-3000,3001,3003,4000-50000
```

`privilege_allow_ports` consists of a specific port or a range of ports divided by ','.

### Connection Pool

By default, frps send message to frpc for create a new connection to backward service when getting an user request.If a proxy's connection pool is enabled, there will be a specified number of connections pre-established.

This feature is fit for a large number of short connections.

1. Configure the limit of pool count each proxy can use in frps.ini:

```ini
# frps.ini
[common]
max_pool_count = 50
```

2. Enable and specify the number of connection pool:

```ini
# frpc.ini
[ssh]
type = tcp
local_port = 22
pool_count = 10
```

### Rewriting the Host Header

When forwarding to a local port, frp does not modify the tunneled HTTP requests at all, they are copied to your server byte-for-byte as they are received. Some application servers use the Host header for determining which development site to display. For this reason, frp can rewrite your requests with a modified Host header. Use the `host_header_rewrite` switch to rewrite incoming HTTP requests.

```ini
# frpc.ini
[web]
privilege_mode = true
type = http
local_port = 80
custom_domains = test.yourdomain.com
host_header_rewrite = dev.yourdomain.com
```

If `host_header_rewrite` is specified, the Host header will be rewritten to match the hostname portion of the forwarding address.

## Development Plan

* Dashboard page.
* Statistics and prestentation of traffic and connection info, etc.
* Support udp protocol.
* Connection pool.
* White list for opening specific ports in privilege mode.
* Support wildcard domain name.
* Url router.
* Load balance to different service in frpc.
* Debug mode for frpc, prestent proxy status in terminal.
* Inspect all http requests/responses that are transmitted over the tunnel.
* Frpc can directly be a webserver for static files.
* Full control mode, dynamically modify frpc's configure with dashboard in frps.
* P2p communicate by make udp hole to penetrate NAT.

## Contributing
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81 changes: 76 additions & 5 deletions README_zh.md
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Expand Up @@ -15,10 +15,14 @@ frp 是一个高性能的反向代理应用,可以帮助您轻松地进行内
* [通过 ssh 访问公司内网机器](#通过-ssh-访问公司内网机器)
* [通过指定域名访问部署于内网的 web 服务](#通过指定域名访问部署于内网的-web-服务)
* [功能说明](#功能说明)
* [Dashboard](#dashboard)
* [身份验证](#身份验证)
* [加密与压缩](#加密与压缩)
* [服务器端热加载配置文件](#服务器端热加载配置文件)
* [特权模式](#特权模式)
* [端口白名单](#端口白名单)
* [连接池](#连接池)
* [修改 Host Header](#修改-host-header)
* [开发计划](#开发计划)
* [贡献代码](#贡献代码)
* [贡献者](#贡献者)
Expand Down Expand Up @@ -133,6 +137,21 @@ frp 目前正在前期开发阶段,master 分支用于发布稳定版本,dev

## 功能说明

### Dashboard

通过浏览器查看 frp 的状态以及代理统计信息展示。

需要在 frps.ini 中指定 dashboard 服务使用的端口,即可开启此功能:

```ini
[common]
dashboard_port = 7500
```

打开浏览器通过 `http://[server_addr]:7500` 访问 dashboard 界面。

![dashboard](/doc/pic/dashboard.png)

### 身份验证

出于安全性的考虑,服务器端可以在 frps.ini 中为每一个代理设置一个 auth_token 用于对客户端连接进行身份验证,例如上文中的 [ssh][web] 两个代理的 auth_token 都为 123。
Expand Down Expand Up @@ -242,20 +261,72 @@ reload 命令仅能用于修改代理的配置内容,[common] 内的公共配

`ssh -oPort=6000 [email protected]`

#### 端口白名单

启用特权模式后为了防止端口被滥用,可以手动指定允许哪些端口被使用,在 frps.ini 中通过 privilege_allow_ports 来指定:

```ini
# frps.ini
[common]
privilege_mode = true
privilege_token = 1234
privilege_allow_ports = 2000-3000,3001,3003,4000-50000
```

privilege_allow_ports 可以配置允许使用的某个指定端口或者是一个范围内的所有端口,以 `,` 分隔,指定的范围以 `-` 分隔。

### 连接池

默认情况下,当用户请求建立连接后,frps 才会请求 frpc 主动与后端服务建立一个连接。当为指定的代理启用连接池后,frp 会预先和后端服务建立起指定数量的连接,每次接收到用户请求后,会从连接池中取出一个连接和用户连接关联起来,避免了等待与后端服务建立连接以及 frpc 和 frps 之间传递控制信息的时间。

这一功能比较适合有大量短连接请求时开启。

1. 首先可以在 frps.ini 中设置每个代理可以创建的连接池上限,避免大量资源占用,默认为 100,客户端设置超过此配置后会被调整到当前值:

```ini
# frps.ini
[common]
max_pool_count = 50
```

2. 在 frpc.ini 中为指定代理启用连接池,指定预创建连接的数量:

```ini
# frpc.ini
[ssh]
type = tcp
local_port = 22
pool_count = 10
```

### 修改 Host Header

通常情况下 frp 不会修改转发的任何数据。但有一些后端服务会根据 http 请求 header 中的 host 字段来展现不同的网站,例如 nginx 的虚拟主机服务,启用 host-header 的修改功能可以动态修改 http 请求中的 host 字段。该功能仅限于 http 类型的代理。

```ini
# frpc.ini
[web]
privilege_mode = true
type = http
local_port = 80
custom_domains = test.yourdomain.com
host_header_rewrite = dev.yourdomain.com
```

原来 http 请求中的 host 字段 `test.yourdomain.com` 转发到后端服务时会被替换为 `dev.yourdomain.com`

## 开发计划

计划在后续版本中加入的功能与优化,排名不分先后,如果有其他功能建议欢迎在 [issues](https://github.com/fatedier/frp/issues) 中反馈。

* Dashboard 界面。
* 流量,连接数等代理信息统计与展示。
* udp 协议支持。
* 针对短连接的连接池优化。
* 特权模式支持端口白名单。
* 支持 udp 协议。
* 支持泛域名。
* 支持 url 路由转发。
* frpc 支持负载均衡到后端不同服务。
* frpc debug 模式,控制台显示代理状态,类似 ngrok 启动后的界面。
* frpc http 请求及响应信息展示。
* frpc 支持直接作为 webserver 访问指定静态页面。
* frpc 完全控制模式,通过 dashboard 对 frpc 进行在线操作。
* 支持 udp 打洞的方式,提供两边内网机器直接通信,流量不经过服务器转发。

## 贡献代码
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