Re: Internet stops working right after startup

Frank,

While i'm not entirely sure im gona say segfault = bad.

What kernel are you running? have you tried a newer version?
And have you tried another nic?

Frank Razenberg wrote:
> Hi Mark,
>
> The route does not change after this. I use "ifdown eth0" and "ifup
> eth0" but "/etc/init.d/networking restart" works as well.
>
> I monitored dmesg and found this:
>
> [ 422.079991] EXT3 FS on sda1, internal journal
> [ 422.483633] loop: module loaded
> [ 423.039841] ip_tables: (C) 2000-2006 Netfilter Core Team
> [ 423.055658] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
> [ 423.093037] ifup[5845]: segfault at 0 ip 7fbd4bce9882 sp
> 7fff541b78d0 error 4 in libc-2.7.so[7fbd4bc4b000+14a000]
> [ 426.970376] NET: Registered protocol family 10
> [ 426.974379] lo: Disabled Privacy Extensions
> [ 427.134712] ifup[5939]: segfault at 0 ip 7fbd4bce9882 sp
> 7fff541b78d0 error 4 in libc-2.7.so[7fbd4bc4b000+14a000]
> [ 427.152782] r8169: eth1: link up
>
> I think this means some program crashes and eth0 is not brought up
> correctly. I have no idea why it does work if I try again though. Any
> further tips?
>
> Frank
>
> Mark Chong wrote:
>> Frank,
>>
>> Does the output of ifconfig and route -n change after you take down
>> eth0 and bring it up again?
>> also how are you taking it down and bring it up again?
>>
>> dmesg will show you if for some reason you lost your link
>>
>>
>> Frank Razenberg wrote:
>>> Hi,
>>>
>>> I've attached the logs Mark asked for. I removed all iptables rules
>>> but the ones to allow ip masquerading. The problem still persists. I
>>> can ping the internal hosts just fine though. The only thing that
>>> seems to solve this is to bring down eth0 and bring it up again. Are
>>> there any logs I can read to help identify this problem?
>>>
>>> Frank
>>>
>>> Ajitabh Pandey wrote:
>>>>
>>>>
>>>> 2009/1/21 Frank Razenberg <frank@zzattack.org
>>>> <mailto:frank@zzattack.org>>
>>>>
>>>> Hi Ajitabh,
>>>>
>>>> I attached the information you asked. Apologies for the mail I
>>>> just sent to your address instead of to the mailing list.
>>>>
>>>>
>>>>
>>>> [snip...]
>>>>
>>>>
>>>> Thanks for the info. Although this has nothing to do with your
>>>> problem, but check your config of the INPUT chain. All incoming
>>>> connections are allowed. Also, to rule out the firewall completely,
>>>> just drop your firewall for the testing and see whether you have
>>>> problems.
>>>>
>>>> Also when this problem happens, can your internal hosts ping the
>>>> Debian machine or connect to it?
>>>>
>>>> Regards.
>>>> -- Ajitabh Pandey
>>>> http://www.ajitabhpandey.info/ | http://www.unixclinic.net/
>>>> ICQ - 150615062
>>>> Registered Linux User - 240748
>>>
>

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