[K12OSN] NAT not starting on bootup
Petre Scheie
petre at maltzen.net
Mon Mar 13 15:19:17 UTC 2006
Okay, I think I know what might be happening: Because of some changes in the network
layout after the server was built, iptables has never worked quite right; specifically,
it interferes with the Windows boxes' ability to talk to Samba on the server. So, while
it's still set to 'on' in chkconfig, I've been turning it off after a boot. This means
the NAT stuff, which is just some parameters fed into iptables and is done after
/etc/init.d/iptables is run, goes away, too. That would explain why starting NAT
manually works until the next reboot. So, I can either fix iptables or set it to 'off'
in chkconfig, and then I think everything will be okay. Thanks Burke, it was your
mention of NAT starting before iptables (it doesn't--but it could) that gave me the clue
as to what was happening.
Petre
Burke Almquist wrote:
> I wonder if nat isn't somehow trying to start before iptables or another
> supporting service, causing it to fail. Does it have any startup
> dependancies?
>
> On Mar 11, 2006, at 7:50 PM, Burke Almquist wrote:
>
>> ip_contrack means that iptables has been started, but not necessarily
>> nat.
>> Does that nat service have it's own script in init.d and is it
>> executable?
>> I know that nat and iptables were separate scripts on older versions
>> of K12LTSP.
>>
>> On Mar 11, 2006, at 6:57 PM, Petre Scheie wrote:
>>
>>> Here's a snippet from /var/log/messages. Notice on line 11 that it
>>> mentions ip_conntrack, which suggests that the NAT startup script ran
>>> as it should. There's no further mention of ip_conntrack until the
>>> time that I ran the script again manually about 90 minutes later.
>>> So, it would seem that something knocked it down. Since I started it
>>> manually, it's been fine. This is consistent with what I saw the
>>> last time I booted the machine, that once I run the startup script
>>> manually, NAT stays up.
>
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