eth0 192.168.0.55
eth1 192.168.0.56
eth2 10.22.0.55
eth3 10.22.0.56
配置内核允许nat转发
echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
sysctl -p
清空iptables策略
iptables -F
配置转发
iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth2 -j SNAT –to-source 10.22.0.55
iptables -t nat -A POSTROUTING -s 10.22.0.0/24 -o eth0 -j SNAT –to-source 192.168.0.55
测试成功后保存策略并重启防火墙
service iptables save
service iptables restart