分享一下我的经验，
http://lilydjwg.is-programmer.com/2014/2/7/linux-really-global-http-proxy.42701.html
1. 优点： 设置一次，全局代理。连虚拟机都不要设置代理。
2. 缺点: 会停止工作，我把它放到crontab里。
1. 编译redsocks https://github.com/darkk/redsocks.
2. proxy.sh
iptables -t nat -N REDSOCKS || true
iptables -t nat -F REDSOCKS
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
iptables -t nat -A REDSOCKS -p tcp -j REDIRECT --to-ports 6666
iptables -t nat -A REDSOCKS -p udp -j REDIRECT --to-ports 8888
# iptables -t nat -A REDSOCKS -d 104.130.159.134/32 -p tcp -m tcp --dport 29418 -j DNAT --to-destination 127.0.0.1:6666
# iptables -t nat -A REDSOCKS -p tcp -j DNAT --to-destination 127.0.0.1:6666
# iptables -t nat -A REDSOCKS -p udp -j DNAT --to-destination 127.0.0.1:8888
iptables -t nat -A OUTPUT -p tcp -j REDSOCKS
pkill redsocks
/root/bin/redsocks -c /root/bin/redsocks.conf
3. redsocks.conf
base {
log_debug = on;
log_info = on;
daemon = on;
redirector = iptables;
}
redsocks {
local_ip = 127.0.0.1;
local_port = 6666;
ip = 10.102.248.16; <---- proxy server IP.
port = 1080;
type = socks5;
}
redudp {
local_ip = 127.0.0.1;
local_port = 8888;
ip = 10.102.248.16;
port = 1080;
}
dnstc {
local_ip = 127.0.0.1;
local_port = 5300;
}
Ubuntu 下服务开机自启动。
http://askubuntu.com/questions/19320/how-to-enable-or-disable-services
http://askubuntu.com/questions/9382/how-can-i-configure-a-service-to-run-at-startup
Ubuntu 下iptables 开机自启动
http://wiki.ubuntu.org.cn/IptablesHowTo
http://www.cnblogs.com/tonybuaa/archive/2013/06/01/3112666.html