1. FreeBSD:
配置/etc/rc.conf
ifconfig_interface="inet 192.168.1.5 255.255.255.0"
ifconfig_interface_alias0="inet 192.168.1.6 255.255.255.0"
注意interface是网卡设备名.
2. Debian
/etc/network/interfaces
auto eth0
iface eth0 inet static
address 192.168.1.145
netmask 255.255.255.0
network 192.168.1.0
gateway 192.168.1.1
另外一个IP
auto eth0:1
iface eth0:1 inet static
address 192.168.1.146
netmask 255.255.255.0
network 192.168.1.0
gateway 192.168.1.1
3.CentOS:
/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
HWADDR=00:0C:29:16:39:5F
NETMASK=255.255.255.0
IPADDR=192.168.1.147
GATEWAY=192.168.1.1
TYPE=Ethernet
绑定另外一个IP, 创建另外一个文件, ifcfg-eth0
DEVICE=eth0 // 注意还是eth0, 指示此IP绑定到eth0
ONBOOT=yes
HWADDR=00:0C:29:16:39:5F
NETMASK=255.255.255.0
IPADDR=192.168.1.148
GATEWAY=192.168.1.1
TYPE=Ethernet
FreeBSD, Debian, CentOS一个网卡绑定多个IP
原文：http://www.jb51.net/os/Unix/1567.html