linux 下配置端口映射

在配置文件/etc/sysctl.conf中加上下面一行:
net.ipv4.ip_forward = 1

使上面的配置生效:
sysctl -p

看下配置是否成功
sysctl -a | grep net.ipv4.ip_forward

配置端口映射:
iptables -t nat -I PREROUTING -p udp --dport 162 -j REDIRECT --to-ports 31087

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转载自sogo6.iteye.com/blog/1266335