How to enable NAT sharing settings for dual-Nic in Linux
Source: Internet
Author: User
Article Title: How to enable NAT sharing settings for dual NICs in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories 1. Nic
Internet Nic
DEVICE = eth0
IPADDR = (Internet IP) NETMASK = 255.255.255.0
GATEWAY = (Internet GATEWAY)
Intranet
DEVICE = eth1
IPADDR = (intranet IP) NETMASK = 255.255.255.0
2. enable the kernel packet forwarding function: echo "1">/proc/sys/net/ipv4/ip_forward
3. packet forwarding disguise in the firewall: iptables-t nat-a postrouting-s 192.168.0.0/24-o eth1-j SNAT? To-source (Internet IP)
Note: Here 192.168.0.0/24 refers to the intranet subnet. if your intranet CIDR block is 192.168.1.1-192.168.1.255, it must be 192.168.1.0/24.
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