SSH/SOCKS成为全局代理

参考 https://www.5yun.org/curl-ce-shi-socks5-or-http-dai-li-ming-ling.html

参考 https://zhuanlan.zhihu.com/p/46804075

测试socks5命令：

curl --socks5 125.119.175.48:8909 http://example.com/

测试http命令：

curl --connect-timeout 2 -x 127.0.0.1:8118 http://google.com

linux curl命令可以使用下面参数设置http(s)代理、socks代理，已经设置它们的用户名、密码以及认证方式：

参数	用法
-x host:port -x [protocol://[user:pwd@]host[:port] --proxy [protocol://[user:pwd@]host[:port]	使用HTTP代理访问；如果未指定端口，默认使用8080端口; protocol默认为http_proxy，其他可能的值包括： http_proxy、HTTPS_PROXY、socks4、socks4a、socks5；如： --proxy 8.8.8.8:8080； -x "http_proxy://aiezu:123@aiezu.com:80"
--socks4 <host[:port]> --socks4a <host[:port]> --socks5 <host[:port]>	使用SOCKS4代理；使用SOCKS4A代理；使用SOCKS5代理；此参数会覆盖“-x”参数；
--proxy-anyauth --proxy-basic --proxy-diges --proxy-negotiate --proxy-ntlm	代理认证方式，参考： --anyauth --basic --diges --negotiate --ntlm
-U <user:password> --proxy-user <user:password>	设置代理的用户名和密码；

Windows下的有：

Proxifier 下载地址
ProxyCap 下载地址

前者比较好用，可控规则较多。我正在使用。

Linux下的有：

proxychains 下载地址
redsocks 下载地址
tsocks 下载地址

proxychain功能较多，支持多个代理轮询等；redsocks据说支持android；tsocks配置简单。

proxychains教程

假设代理为127.0.0.1，端口为7070。我在Ubuntu下安装。

安装很简单：

sudo apt-get install proxychains

配置：

sudo vi /etc/proxychains.conf

把最后的“[ProxyList]”部分配置为自己的代理即可：

socks4 127.0.0.1 7070

使用方法：

proxychains <程序名>

即可让程序使用代理。

redsocks教程

严格意义上来说，proxychains不算自动的全局代理，有没有像Proxifier这样，开了之后自动让所有启动的程序都走系统代理呢？答案就是redsocks。

首先安装Ubuntu编译环境和必要的库：

sudo apt-get install autoconf automake libtool libevent-dev g++

下载源代码，然后编译安装：

./mkauto.sh

cp redsocks /usr/local/bin/

配置文件为：

base {
// debug: connection progress & client list on SIGUSR1
log_debug = off;

// info: start and end of client session
log_info = off;

/* possible `log' values are:
* stderr
* file:/path/to/file
* syslog:FACILITY facility is any of "daemon", "local0"..."local7"
*/
log = "file:/dev/null";
// log = stderr;
// log = "file:/path/to/file";
// log = "syslog:local7";

// detach from console
daemon = on;

/* Change uid, gid and root directory, these options require root
* privilegies on startup.
* Note, your chroot may requre /etc/localtime if you write log to syslog.
* Log is opened before chroot & uid changing.
*/
// user = nobody;
// group = nobody;
// chroot = "/var/chroot";

/* possible `redirector' values are:
* iptables - for Linux
* ipf - for FreeBSD
* pf - for OpenBSD
* generic - some generic redirector that MAY work
*/
redirector = iptables;
}

redsocks {
/* `local_ip' defaults to 127.0.0.1 for security reasons,
* use 0.0.0.0 if you want to listen on every interface.
* `local_*' are used as port to redirect to.
*/
local_ip = 127.0.0.1;
local_port = 12345;

// `ip' and `port' are IP and tcp-port of proxy-server
ip = 127.0.0.1;
port = 7070;

// known types: socks4, socks5, http-connect, http-relay
type = socks5;

// login = "foobar";
// password = "baz";
}

redudp {
// `local_ip' should not be 0.0.0.0 as it's also used for outgoing
// packets that are sent as replies - and it should be fixed
// if we want NAT to work properly.
local_ip = 127.0.0.1;
local_port = 10053;

// `ip' and `port' of socks5 proxy server.
ip = 10.0.0.1;
port = 1080;
login = username;
password = pazzw0rd;

// kernel does not give us this information, so we have to duplicate it
// in both iptables rules and configuration file. By the way, you can
// set `local_ip' to 127.45.67.89 if you need more than 65535 ports to
// forward ;-)
// This limitation may be relaxed in future versions using contrack-tools.
dest_ip = 8.8.8.8;
dest_port = 53;

udp_timeout = 30;
udp_timeout_stream = 180;
}

dnstc {
// fake and really dumb DNS server that returns "truncated answer" to
// every query via UDP, RFC-compliant resolver should repeat same query
// via TCP in this case.
local_ip = 127.0.0.1;
local_port = 5300;
}

// you can add more `redsocks' and `redudp' sections if you need.

这里的配置没有配置udp的代理部分，只是配置了tcp即redsocks部分。监听端口是12345。日志关闭了，因为好像我下载的当前版本无论怎么样都产生一堆调试日志，不知道以后会不会修复这点。

启动关闭脚本redsocks.sh为（via）：

#! /bin/bash

SSHHOST=creke
SSHPORT=22
SSHUSR=creke
SSHPWD=creke

SSHDAEMON=/usr/local/bin/plink
SSHPIDFILE=/var/run/sshtunnel.pid

start_ssh()
{
    echo "Start SSH Tunnel Daemon: "
    start-stop-daemon -b -q -m -p $SSHPIDFILE --exec $SSHDAEMON -S
    -- -N -D 127.0.0.1:7070 -P $SSHPORT -pw $SSHPWD $SSHUSR@$SSHHOST
    echo "SSH Tunnel Daemon Started."
}

stop_ssh()
{
    #ps aux|grep "ssh -NfD 1234"|awk '{print $2}'|xargs kill
    if [ -f $SSHPIDFILE ]; then
    PID=$(cat $SSHPIDFILE)
    kill $PID
    while [ -d /proc/$PID ];
    do
    sleep 1
    done
    fi
    rm -rf $SSHPIDFILE
    echo "SSH Tunnel Daemon Stoped."
}

case "$1" in
start)
    start_ssh
    cd /usr/local/redsocks
    if [ -e redsocks.log ] ; then
      rm redsocks.log
    fi
    ./redsocks -p /usr/local/redsocks/redsocks.pid #set daemon = on in config file
    # start redirection
    # iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to 12345
    # iptables -t nat -A OUTPUT -p tcp --dport 443 -j REDIRECT --to 12345
    # Create new chain
    iptables -t nat -N REDSOCKS

    # Ignore LANs and some other reserved addresses.
    iptables -t nat -A REDSOCKS -d 0.0.0.0/8 -j RETURN
    iptables -t nat -A REDSOCKS -d 10.0.0.0/8 -j RETURN
    iptables -t nat -A REDSOCKS -d 127.0.0.0/8 -j RETURN
    iptables -t nat -A REDSOCKS -d 169.254.0.0/16 -j RETURN
    iptables -t nat -A REDSOCKS -d 172.16.0.0/12 -j RETURN
    iptables -t nat -A REDSOCKS -d 192.168.0.0/16 -j RETURN
    iptables -t nat -A REDSOCKS -d 224.0.0.0/4 -j RETURN
    iptables -t nat -A REDSOCKS -d 240.0.0.0/4 -j RETURN

    # Anything else should be redirected to port 12345
    iptables -t nat -A REDSOCKS -p tcp -j REDIRECT --to-ports 12345
    # Any tcp connection should be redirected.
    iptables -t nat -A OUTPUT -p tcp -j REDSOCKS
    ;;

stop)
    stop_ssh
    cd /usr/local/redsocks
    if [ -e redsocks.pid ]; then
      kill `cat redsocks.pid`
      rm redsocks.pid
    else
      echo already killed, anyway, I will try killall
      killall -9 redsocks
    fi
    # stop redirection
    iptables -t nat -F OUTPUT
    iptables -t nat -F REDSOCKS
    iptables -t nat -X REDSOCKS
    ;;

start_ssh)
    start_ssh
    ;;

stop_ssh)
    stop_ssh
    ;;

clean_dns)
    # iptables -A INPUT -p udp --sport 53 -m state --state ESTABLISHED -m you-know-who -j DROP -m comment --comment "drop you-know-who dns hijacks"
    echo this function not finished
    ;;

*)
    echo "Usage: redsocks start|stop|start_ssh|stop_ssh|clean_dns" >&2
    exit 3
    ;;
esac

iptables的规则是让所有的TCP包都发送到redsocks监听的端口12345。本脚本还整合了ssh的daemon启动，使用start-stop-daemon来实现。

启动和关闭：

将启动关闭脚本中的开头的几个变量配置好

启动命令：sudo ./redsocks.sh start

关闭命令：sudo ./redsocks.sh stop

============ End