pd 是一个本地的代理调度器。

特性

1. 专注做一个连接调度器，上级代理要自备；
2. 可自动选择回应最快的 IP；
3. 自动生成可用性评分，可用性低时切换用代理；
4. 支持 socks4a/socks5/http 协议
5. 支持预设“直连/被封”列表；
6. 可做为 PAC 文件服务器。

用法

详参 pd -h.

例子：

Windows 只服务本机

start pd.exe -proxies=http://127.0.0.1:1080,http://127.0.0.1:2080,http://127.0.0.1:3080,socks5://127.0.0.1:1081,socks5://127.0.0.1:2081,socks5://127.0.0.1:3081,socks4a://127.0.0.1:2081 -netprobeurl=https://www.toutiao.com

*nix 服务路由器下的局域网

pd -proxies=http://127.0.0.1:1080,http://127.0.0.1:2080,http://127.0.0.1:3080,socks5://127.0.0.1:1081,socks5://127.0.0.1:2081,socks5://127.0.0.1:3081,socks4a://127.0.0.1:2081 -netprobeurl=https://www.toutiao.com -listens=192.168.2.1:6699 -direct=/etc/pd/direct -blocked=/etc/pd/blocked -statfile=/tmp/stat.json

可以把启动命令写成启动脚本里，方便使用。多行写法如下：

Windows bat

start pd.exe -proxies=^
http://127.0.0.1:1080,^
http://127.0.0.1:2080,^
http://127.0.0.1:3080,^
socks5://127.0.0.1:1081,^
socks5://127.0.0.1:2081,^
socks5://127.0.0.1:3081,^
socks4a://127.0.0.1:2081 ^
-netprobeurl=https://www.toutiao.com

*nix bash

pd -proxies=\
http://127.0.0.1:1080,\
http://127.0.0.1:2080,\
http://127.0.0.1:3080,\
socks5://127.0.0.1:1081,\
socks5://127.0.0.1:2081,\
socks5://127.0.0.1:3081,\
socks4a://127.0.0.1:2081 \
-netprobeurl=https://www.toutiao.com \
-listens=192.168.2.1:6699 \
-direct=/etc/pd/direct \
-blocked=/etc/pd/blocked \
-statfile=/tmp/stat.json

支持

• 静态规则：子域名优先。
• 静态规则：direct > blocked.
• 静态 blocked 主机名（IP）总是走代理。
• 静态 direct 主机名（IP）总是直连。
• 一般主机名（IP）：得分动态决定尝试直连次数，如果没有成功，从反应最快的代理开始尝试 3 次；如果之前直接尝试的代理，却没有提供代理，回落尝试 1 次直连。
• 信任你的 DNS。 如果它不够可靠，改进它，要不然就把那些特殊的域名直接放进 blocked 里。对于 DNS 服务器，建议使用 0.0.0.0/:: 或者禁用域名列表来做拦截，因为 127.0.0.1/::1 或者其它保留 IP 可能正被某服务器使用。
• 使用相同协议的上游代理原始请求。

不支持

• 代理做身份验证。本地代理没必要。
• 非公网 IP 或者非域名通信被传递到上游代理。
• SOCKS BIND 和 UDP。

静态主机名匹配语法

# pd 的灵魂是使用中决定直连还是走代理。

# 一些站点规则可以放进 `direct` 里固定，避免走代理：
## 局域网
## 包含敏感信息的未加密网站：登陆页、银行、网购、社交网站、有 IP 认证的网站等。
## 未被封/国内的网站，例如：https://github.com/felixonmars/dnsmasq-china-list/raw/master/accelerated-domains.china.conf

# 永久被封的网站可以放进文件 `blocked`。

# 我是一个注解。 又一个隐式注解。

# 一个主机名
www.google.com

# 域名匹配：自右向左，`.` 是分隔符，无需 `*`，无前导分隔符, 前导 `=` 表示精确匹配。
#
# 所有 `.cn` 的网站。
cn  # *.cn
# *.wikipedia.org
wikipedia.org
# 精确匹配 `gitlab.com`，但是不匹配任何 `*.gitlab.com`。
=gitlab.com

# IP 段匹配：自左向右。`.` 和 `:` 分别是 IPv4 和 IPv6 的分隔符。 分隔符和 `*` 是必需的。
#
# 10.0.0.0-10.255.255.255
10.*
# 192.168.0.0-192.168.255.255.
192.168.*
#
# IPv6 缩写法产生的待例：
# `1111:0000:0000:4444:5555:6666:7777:8888/64`
# = `1111::4444:5555:6666:7777:8888/64`
# = `1111::4444:*` + `1111:0:0:4444:*`
#
# `1111:0:0:4444:*`
# = `1111:0:0:4444::*` + `1111:0:0:4444:not0::`
#
# `1111:0:0:4444::*`
# = `1111:0000:0000:4444:0000:0000:0000:8888/112`
#
# `1111:0:0:4444:not0::`
# = `1111:0000:0000:4444:not0:0000:0000:0000`
#
# Converter: https://github.com/lifenjoiner/iprefix

局限

网站自己限制（封禁）访问的站点或者路径并不能被识别。

统计 Vs 隐私

pd 存储主机最近 7 天（-statvalidity 的默认值） 的动态统计数据，包括 "host/IP:port"、最近 10 次连接的 EWMA、访问计数和时间。这是动态调度算法必需的。

你可以用 -statfile 将结果保存为 nul。但是，这样就只能冷重启。

主页

https://github.com/lifenjoiner/pd

pd is a local proxy dispatcher.

Features

1. Dedicate to be a dispatcher, prepare the upstream proxies yourself,
2. May automatically choose the fatest responsed IP,
3. Automatically yield the availability score, and proxy it if with poor availability,
4. Support protocols socks4a/socks5/http,
5. Support predefined "direct/blocked" list files,
6. Serve as a PAC file server.

Usage

Try pd -h for details.

Examples:

Windows serves only yourself

start pd.exe -proxies=http://127.0.0.1:1080,http://127.0.0.1:2080,http://127.0.0.1:3080,socks5://127.0.0.1:1081,socks5://127.0.0.1:2081,socks5://127.0.0.1:3081,socks4a://127.0.0.1:2081 -netprobeurl=https://www.toutiao.com

*nix serves for the LAN of a router

pd -proxies=http://127.0.0.1:1080,http://127.0.0.1:2080,http://127.0.0.1:3080,socks5://127.0.0.1:1081,socks5://127.0.0.1:2081,socks5://127.0.0.1:3081,socks4a://127.0.0.1:2081 -netprobeurl=https://www.toutiao.com -listens=192.168.2.1:6699 -direct=/etc/pd/direct -blocked=/etc/pd/blocked -statfile=/tmp/stat.json

It is convenient to write the lauching command into a script. Multi-line format like this:

Windows bat

start pd.exe -proxies=^
http://127.0.0.1:1080,^
http://127.0.0.1:2080,^
http://127.0.0.1:3080,^
socks5://127.0.0.1:1081,^
socks5://127.0.0.1:2081,^
socks5://127.0.0.1:3081,^
socks4a://127.0.0.1:2081 ^
-netprobeurl=https://www.toutiao.com

*nix bash

pd -proxies=\
http://127.0.0.1:1080,\
http://127.0.0.1:2080,\
http://127.0.0.1:3080,\
socks5://127.0.0.1:1081,\
socks5://127.0.0.1:2081,\
socks5://127.0.0.1:3081,\
socks4a://127.0.0.1:2081 \
-netprobeurl=https://www.toutiao.com \
-listens=192.168.2.1:6699 \
-direct=/etc/pd/direct \
-blocked=/etc/pd/blocked \
-statfile=/tmp/stat.json

Dos

• Static rules: sub-domain first.
• Static rules: direct > blocked.
• Static blocked hosts (IPs) always go proxied.
• Static direct hosts (IPs) always go direct.
• General hosts (IPs): go direct for dynamically calculated times, if unsolved, go proxied with 3 tries using the fastest proxies in order; if went proxied directly but no proxy configured, fall back to a direct try.
• Trust your DNS. If the DNS isn't reliable enough, improve it, or place the special hosts in blocked file to go proxied directly. For DNS servers, it is suggested to use 0.0.0.0/:: or disabled domain list to block hosts, because 127.0.0.1/::1 or other reserved IPs are legal to be a server.
• Proxy the requests using the same protocol.

Don'ts

• Proxy authentication. No need for local proxies.
• Non-Global-Internet-IPs or Non-domain-hosts go to upstream proxies.
• SOCKS BIND and UDP.

Static Host Matching Syntax

# The soal of pd is going direct or proxied on the fly.

# Some site rules can be list `direct` as solid, avoid going proxied ever:
## LAN
## Sensitive non-encrypted sites: login, bank, e-shopping, SNS, IP authorizing sites, etc.
## Unblocked/domestic sites, example: https://github.com/felixonmars/dnsmasq-china-list/raw/master/accelerated-domains.china.conf

# The permanently blocked sites can be placed in `blocked` file.

# I'm a comment. And an implicit comment.

# A host.
www.google.com

# Domain match: from right to left, `.` as separator, no `*`, no leading separator, leading `=` means exact match.
#
# All `.cn` sites.
cn  # *.cn
# *.wikipedia.org
wikipedia.org
# Exactly `gitlab.com` without any of `*.gitlab.com`.
=gitlab.com

# IP range match: from left to right. `.` for IPv4, `:` for IPv6 as separator. Separator and `*` are required.
#
# 10.0.0.0-10.255.255.255
10.*
# 192.168.0.0-192.168.255.255.
192.168.*
#
# IPv6 shortening rules yield special cases:
# `1111:0000:0000:4444:5555:6666:7777:8888/64`
# = `1111::4444:5555:6666:7777:8888/64`
# = `1111::4444:*` + `1111:0:0:4444:*`
#
# `1111:0:0:4444:*`
# = `1111:0:0:4444::*` + `1111:0:0:4444:not0::`
#
# `1111:0:0:4444::*`
# = `1111:0000:0000:4444:0000:0000:0000:8888/112`
#
# `1111:0:0:4444:not0::`
# = `1111:0000:0000:4444:not0:0000:0000:0000`
#
# Converter: https://github.com/lifenjoiner/iprefix

Limits

Sites/Pathes restricted (blocked) by the servers self are not detectable.

Statistics Vs Privacy

pd stores dynamic statistics of hosts for the last 7d (-statvalidity default), including "host/IP:port" pairs, EWMA of the last 10 connections, visit count, and the last visit time. It is required to implement the dynamic dispatching.

You can use -statfile to save them to nul. But that will lead to a cold restart.

Homepage

https://github.com/lifenjoiner/pd