[newbie] Connection sharing / IP problem

pieter Sun, 19 Aug 2001 12:54:18 -0700

Hi,

After rebooting my Mandrake 8.0 server machine, connection sharing no longer works, both from my Windows 2K client, as from my Mandrake 8.0 client (the same machines, different partitions). I'm sure that physically the network works fine (I can do pings from both sides internal to the network, I can do ssh from my client to the server, and I can use VNC-client from my windows machine). However, I cannot ping from the client to an external address (e.g. www.yahoo.com), although the address got resolved correctly. I can ping to the external address from the server (I have an ADSL-connection, masquerading enabled), do some browsing, sending this email, ... I also verified that the ping got over the pppoe connection (ifconfig gave extra transmitted packets). SAMBA isn't working also (it was before rebooting).

here's the output of ifconfig:

eth0      Link encap:Ethernet  HWaddr 00:E0:7D:8D:83:75  
          inet addr:10.0.0.10  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:24950 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27477 errors:0 dropped:0 overruns:0 carrier:0
          collisions:2 txqueuelen:100 
          RX bytes:18046083 (17.2 Mb)  TX bytes:3121121 (2.9 Mb)
          Interrupt:10 Base address:0x6800


eth1      Link encap:Ethernet  HWaddr 00:E0:7D:8B:EF:85  
          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:244415 errors:0 dropped:0 overruns:0 frame:0
          TX packets:319230 errors:0 dropped:0 overruns:0 carrier:0
          collisions:1580 txqueuelen:100 
          RX bytes:19592520 (18.6 Mb)  TX bytes:244881341 (233.5 Mb)
          Interrupt:11 Base address:0x6c00 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:5661 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5661 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1784777 (1.7 Mb)  TX bytes:1784777 (1.7 Mb)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:217.136.125.133  P-t-P:217.136.120.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:2943 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3193 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:1578773 (1.5 Mb)  TX bytes:317183 (309.7 Kb)

eth0 connects to my provider (ADSL), eth1 connects to my internal network.

Here's the output of netstat -nr:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
255.255.255.255 0.0.0.0         255.255.255.255 UH       40 0          0 eth1
217.136.120.1   0.0.0.0         255.255.255.255 UH       40 0          0 ppp0
10.0.0.0        0.0.0.0         255.255.255.0   U        40 0          0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U        40 0          0 eth1
127.0.0.0       0.0.0.0         255.0.0.0       U        40 0          0 lo
0.0.0.0         217.136.120.1   0.0.0.0         UG       40 0          0 ppp0

By my knowledge, I didn't install any firewall. However, I did try to set security settings to medium (Mandrake Control Center), and I tried to install the firewall (however, because I gave my CD to someone else, I couldn't install the necessary packages).
Another strange thing, is that I can't issue iptables -L, it gives the following error:

iptables v1.2.2: can't initialize iptables table `filter': Module is wrong version
Perhaps iptables or your kernel needs to be upgraded.

Any help is very welcome, since this is a very frustrating situation.

Thanks in advance,

Pieter

[newbie] Connection sharing / IP problem

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