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在局域网中装有双网卡且连接双内网网段的CentOS服务器通过路由器端口转发实现双公网IP同时访问

2019-11-11 17:09:37

标签: CentOS, dual network interfaces, ip command, 双网卡, 双网卡路由, 双公网IP

场景:一台服务器在局域网中,通过路由器的端口映射对外提供服务,且服务器装有双网卡,分属不同内网网段,每个网段有一个公网IP映射到服务器。

现象:服务器两块网卡中的默认网卡对应的公网IP可以正常访问服务器,而另一个IP无法访问。

解决:需要通过配置使两个公网IP都可以正常访问服务器。假设两个网段分别为:192.168.0和192.168.1,服务器在两个网段的IP分别为:192.168.0.9和192.168.1.9,网卡名称分别为:enp2s0和enp3s0。路由配置如下:
echo "101 Net1" >> /etc/iproute2/rt_tables
echo "102 Net2" >> /etc/iproute2/rt_tables

ip route add default via 192.168.0.1 dev enp2s0 table Net1
ip route add default via 192.168.1.1 dev enp3s0 table Net2

ip rule add from 192.168.0.9 table Net1
ip rule add from 192.168.1.9 table Net2

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