ADSL为什么不能共享上网。谁能帮帮我。。。。

wssxr915

[root@localhost ~]# /sbin/ifup ppp0
[root@localhost ~]# ipconfig
bash: ipconfig: command not found
[root@localhost ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:05:5D:6B:63:5F
          inet6 addr: fe80::205:5dff:fe6b:635f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:472 errors:0 dropped:0 overruns:0 frame:0
          TX packets:491 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:175562 (171.4 KiB)  TX bytes:68286 (66.6 KiB)
          Interrupt:17 Base address:0xec00

eth1      Link encap:Ethernet  HWaddr 00:40:05:46:44:7A
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::240:5ff:fe46:447a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:246 errors:0 dropped:0 overruns:0 frame:0
          TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:19888 (19.4 KiB)  TX bytes:7487 (7.3 KiB)
          Interrupt:18 Base address:0x800

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4596 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4596 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5654491 (5.3 MiB)  TX bytes:5654491 (5.3 MiB)

ppp0      Link encapoint-to-Point Protocol
          inet addr:222.130.27.223  P-t-P:222.130.0.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:70 errors:0 dropped:0 overruns:0 frame:0
          TX packets:77 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:20543 (20.0 KiB)  TX bytes:9139 (8.9 KiB)

[root@localhost ~]# echo "1" >/proc/sys/net/ipv4/ip_forward
[root@localhost ~]# iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
[root@localhost ~]# ping 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
64 bytes from 192.168.1.2: icmp_seq=26 ttl=128 time=0.201 ms
64 bytes from 192.168.1.2: icmp_seq=27 ttl=128 time=0.165 ms
64 bytes from 192.168.1.2: icmp_seq=28 ttl=128 time=0.176 ms
64 bytes from 192.168.1.2: icmp_seq=29 ttl=128 time=0.191 ms
64 bytes from 192.168.1.2: icmp_seq=30 ttl=128 time=0.197 ms
64 bytes from 192.168.1.2: icmp_seq=31 ttl=128 time=0.170 ms
64 bytes from 192.168.1.2: icmp_seq=32 ttl=128 time=0.204 ms
64 bytes from 192.168.1.2: icmp_seq=33 ttl=128 time=0.197 ms
64 bytes from 192.168.1.2: icmp_seq=34 ttl=128 time=0.173 ms
64 bytes from 192.168.1.2: icmp_seq=35 ttl=128 time=0.186 ms
64 bytes from 192.168.1.2: icmp_seq=36 ttl=128 time=0.191 ms

--- 192.168.1.2 ping statistics ---
36 packets transmitted, 11 received, 69% packet loss, time 35002ms
rtt min/avg/max/mdev = 0.165/0.186/0.204/0.018 ms
[root@localhost ~]#
主机能上网。
192.168.1..2不能上网。
哪里设置错了？
我是新新手／／。。。。

sysnotdown

用iptables可以的，曾经用有线网卡做pppoe外联，无线网卡做内部网关，没问题。我用ubuntu，确认两个网卡工作正常。

gugong

若有默认网关，把这个默认网关去掉看看

或者把：
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
写成：
iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j MASQUERADE