[K12OSN] NAT not starting on bootup

Burke Almquist balmquist at mindfirestudios.com
Sun Mar 12 01:50:43 UTC 2006


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.
>
> Mar  9 10:09:07 kelley4gov kernel: EXT3 FS on sda3, internal journal
> Mar  9 10:09:07 kelley4gov kernel: kjournald starting.  Commit  
> interval 5 seconds
> Mar  9 10:09:07 kelley4gov kernel: EXT3 FS on sda1, internal journal
> Mar  9 10:09:07 kelley4gov kernel: EXT3-fs: mounted filesystem with  
> ordered data mode.
> Mar  9 10:09:07 kelley4gov kernel: SELinux: initialized (dev sda1,  
> type ext3), uses xattr
> Mar  9 10:09:07 kelley4gov kernel: SELinux: initialized (dev tmpfs,  
> type tmpfs), uses transition SIDs
> Mar  9 10:09:07 kelley4gov kernel: Adding 2096472k swap on /dev/ 
> sda2. Priority:-1 extents:1 across:2096472k
> Mar  9 10:09:07 kelley4gov kernel: SELinux: initialized (dev  
> binfmt_misc, type binfmt_misc), uses genfs_contexts
> Mar  9 10:09:07 kelley4gov kernel: ip_tables: (C) 2000-2002  
> Netfilter core team
> Mar  9 10:09:07 kelley4gov kernel: Netfilter messages via NETLINK  
> v0.30.
> Mar  9 10:09:07 kelley4gov kernel: ip_conntrack version 2.4 (8192  
> buckets, 65536 max) - 232 bytes per conntrack
> Mar  9 10:09:07 kelley4gov kernel: SELinux: initialized (dev  
> rpc_pipefs, type rpc_pipefs), uses genfs_contexts
> Mar  9 10:09:07 kelley4gov kernel: Bluetooth: Core ver 2.8
> Mar  9 10:09:07 kelley4gov kernel: NET: Registered protocol family 31
> Mar  9 10:09:07 kelley4gov kernel: Bluetooth: HCI device and  
> connection manager initialized
> Mar  9 10:09:07 kelley4gov kernel: Bluetooth: HCI socket layer  
> initialized
> Mar  9 10:09:07 kelley4gov kernel: Bluetooth: L2CAP ver 2.8
>
>
> Burke Almquist wrote:
>> Check the logs at startup, if it is failing to start, or crashing   
>> right after boot, it should give you an idea why. Does it say  
>> anything.
>> On Mar 9, 2006, at 12:54 PM, Petre Scheie wrote:
>>> The power went out this morning and when it came back on the   
>>> K12LTSP server booted with no problems, and the thin clients  
>>> were  able to connect as normal.  But I also have some Windows  
>>> boxes on  the same network and they get their addresses from the  
>>> LTSP server  and treat it (the server) as the default gateway,  
>>> which was  working.  So far, so good.  But the Windows boxes  
>>> couldn't connect  to the internet.  After poking around a bit I  
>>> concluded that NAT  wasn't running: there was no /proc/net/ 
>>> ipconntrack file.  The /etc/ init.d/nat script doesn't support  
>>> the 'status' switch, so I just  ran 'service nat start', /proc/ 
>>> net/ipconntrack appeared, and the  Windows boxes were able to get  
>>> to the internet.
>>>
>>> I noticed the same problem a couple months ago when I first   
>>> installed the server at the site, that NAT was not working after   
>>> bootup.  chkconfig shows NAT to be on for runlevels  2-5.  What   
>>> would cause it to not start at boot?
>>>
>>> Petre
>>>
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