急，求助啊，拨号和固定IP问题

[qsword]

我有一台Ubuntu服务器做代理
三个网卡，一块是从光纤接过来的路由器拨号分配的192.168.88.8
一块是给子网用，192.168.100.1
还有一块是光纤接出来的固定IP，给外面的人用
现在有个问题，我固定IP设置以后，ping不通，后来发现我把内网的192.168.100.1禁掉貌似能ping通了，
192.168.100.1下面接了好多机子的，我觉得是被分流了。
想问下我该怎么设置才能让我的固定IP，才能让外网的人城外一个专用线路，而不会被分流
路由表 route：

default 192.168.88.1 0.0.0.0 UG 0 0 0 eth1
default 1phone-sz.lo 0.0.0.0 UG 0 0 0 eth0
qfcenter 192.168.88.1 255.255.255.255 UGH 0 0 0 eth1
link-local * 255.255.0.0 U 1000 0 0 eth0
172.16.234.0 * 255.255.255.0 U 0 0 0 vmnet8
192.168.11.0 192.168.11.9 255.255.255.0 UG 0 0 0 tun0
192.168.11.9 * 255.255.255.255 UH 0 0 0 tun0
192.168.18.1 * 255.255.255.255 UH 0 0 0 ppp0
192.168.88.0 * 255.255.255.0 U 0 0 0 eth1
192.168.100.0 * 255.255.255.0 U 0 0 0 eth0
192.168.120.0 * 255.255.255.0 U 0 0 0 vmnet1
220.xxx.xxx.165 * 255.255.255.252 U 0 0 0 eth2

网卡配置 /etc/network/interfaces :

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

# stu network
auto eth0
iface eth0 inet static
address 192.168.100.1
netmask 255.255.255.0
gateway 192.168.100.1

# teacher network
auto eth1
iface eth1 inet static
address 192.168.88.8
netmask 255.255.255.0
gateway 192.168.88.1

#vlan network
auto eth2
iface eth2 inet static
address 220.xxx.xxx.165
netmask 255.255.255.252
gateway 220.xxx.xxx.166

iptables 规则:
#! /bin/bash
iptables -F
iptables -t nat -F
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.200/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.201/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.202/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.203/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.204/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.205/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.0/24 -d 192.168.88.76/32 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.100.101 ! -d 192.168.11.0/24 -j DROP
#iptables -A FORWARD -i eth0 -s 192.168.100.102 ! -d 192.168.11.0/24 -j DROP
#iptables -A FORWARD -i eth0 -s 192.168.100.103 ! -d 192.168.11.0/24 -j DROP
iptables -A FORWARD -i eth0 -s 192.168.100.104 ! -d 192.168.11.0/24 -j DROP
#iptables -A FORWARD -i eth0 -s 192.168.100.105 ! -d 192.168.11.0/24 -j DROP
iptables -A FORWARD -i eth0 -s 192.168.100.106 ! -d 192.168.11.0/24 -j DROP
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
iptables -t nat -A POSTROUTING -o eth2 -j MASQUERADE
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE
iptables -t nat -A POSTROUTING -p tcp -m tcp -d 193.168.11.1 -j SNAT --to-source 192.168.88.8

[qsword]

好像不是被分流，我把子网借口的网线都拔了，还是不行~

[qsword]

好像不是被分流，我把子网借口的网线都拔了，还是不行~