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Old 06-04-2004, 06:58 PM   #1
Registered: Apr 2003
Distribution: Gentoo/Mandrake 10.0
Posts: 110

Rep: Reputation: 15
Network only works one way with Mandrake 10

I have recently installed Mandrake 10 Official on my server, and the network doesn't work properly. I can ping my desktop and router from my server, but I cannot ping my server from my desktop. The server cannot ping itself either (@localhost,, or, its own ip address on the network). I installed over NFS, and the sources (which exist on my desktop) that I mounted to do the installation are still mounted and useable over the network from my server.

ifconfig -a returns this:
eth0      Link encap:Ethernet  HWaddr 00:06:29:2E:E0:58  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::206:29ff:fe2e:e058/64 Scope:Link
          RX packets:842 errors:0 dropped:0 overruns:0 frame:0
          TX packets:45 errors:0 dropped:0 overruns:5 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:56033 (54.7 Kb)  TX bytes:3859 (3.7 Kb)
          Interrupt:11 Base address:0x9000 

lo        Link encap:Local Loopback  
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1540 (1.5 Kb)  TX bytes:1540 (1.5 Kb)

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
I don't see any problems with this (ip address exists anyways).

During the boot, it hangs for a few seconds while bringing up eth0 but still says [OK]. If I try to restart the network after boot (service network restart), bringing up the network fails. For this reason I don't think it is a firewall issue. What could be the problem?
Old 06-05-2004, 07:38 AM   #2
LQ Newbie
Registered: Mar 2004
Posts: 6

Rep: Reputation: 0
Just a shot in the dark, but are you sure u have SNMP installed? As far as I remember, your utilities to check connectivity is included in that protocol.
You are pinging as root?
If u were able to ping localhost i would've said it might be the cable..
Sorry for giving stupid answers but i can't really think of anything specific.
Old 06-05-2004, 07:57 AM   #3
Registered: Mar 2004
Location: UK
Distribution: Debian Unstable
Posts: 58

Rep: Reputation: 15
Hmm... doesn't look good. Try flushing your firewall rules by running:

iptables -F
iptables -t nat -F
iptables -t mangle -F
iptables -P INPUT ACCEPT

If it was a default mandrake firewall rule set, it should have given you lo bypass rules, but it makes sense with the pinging.



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