RedHat linux 下NAT实验

 

/etc/sysconfig/network-scripts/ifcfg-eth0

 

DEVICE=eth0

BOOTPROTO=none

HWADDR=00:0C:29:94:67:DE

ONBOOT=yes

TYPE=Ethernet

NETMASK=255.255.255.0

IPADDR=192.168.1.52

USERCTL=no

IPV6INIT=no

PEERDNS=yes

GATEWAY=192.168.1.227

 

 

/etc/sysconfig/network-scripts/ifcfg-eth1

 

# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]

DEVICE=eth1

ONBOOT=yes

BOOTPROTO=none

IPADDR=192.168.100.1

NETMASK=255.255.255.0

HWADDR=00:0C:29:94:67:E8

TYPE=Ethernet

 

echo "1"> /proc/sys/net/ipv4/ip_forward

 

 

iptables -t nat -A POSTROUTING -s 192.168.100.0/24 -j SNAT --to 192.168.1.52

 

/etc/resolv.conf

search localdomain

nameserver 192.168.1.1

 

测试结果

 

 

192.168.100.3能正常访问外网