Host Route + NAT

Linux 基礎最後一堂課練習一個網路環境，蠻有趣的，特別記錄下來

其中U-Client2比較特別，與其他台的ip網段不同，用以練習Host Route

1.U-NAT:

(1)vim /etc/network/interfaces	auto eth0 iface eth0 inet static address 192.168.213.5 netmask 255.255.255.0 gateway 192.168.213.2 auto eth1 iface eth1 inet static address 172.29.23.254 netmask 255.255.255.0
(2)vim /etc/rc.local	route add -net 172.29.23.0 netmask 255.255.255.192 gw 172.29.23.200 dev eth1 route add -net 172.29.23.64 netmask 255.255.255.192 gw 172.29.23.201 dev eth1 iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
(3)vim /etc/sysctl.conf	#net.ipv4.ip_forward=1 將該行註解取消

搞定後記得重開機或下指令讓修改的設定馬上生效

2.U-Router:

(1)vim /etc/network/interfaces	auto eth0 iface eth0 inet static address 172.29.23.200 netmask 255.255.255.192 gateway 172.29.23.254 auto eth1 iface eth1 inet static address 172.29.23.62 netmask 255.255.255.192
(2)vim /etc/sysctl.conf	#net.ipv4.ip_forward=1 將該行註解取消

搞定後記得重開機或下指令讓修改的設定馬上生效

3.U-Client1:

(1)vim /etc/network/interfaces

auto eth0 iface eth0 inet static address 172.29.23.5 netmask 255.255.255.192 gateway 172.29.23.62

搞定後記得重開機或下指令讓修改的設定馬上生效

4.U-Client2:

說明	由於本機器網段10.1.1.0/24與172.29.23.192/26不同， 所以必須使用Host Route方式來使網路可通
(1)vim /etc/network/interfaces	auto eth0 iface eth0 inet static address 10.1.1.5 netmask 255.255.255.0
(2)vim /etc/rc.local	route add -host 172.29.23.254 dev eth0 route add default gw 172.29.23.254 dev eth0
(3)U-NAT:加入 vim /etc/rc.local	route add -host 10.1.1.5 dev eth1

搞定收工