BIND do not listen on udp port 53

[Thomas Manson]

Hi,
  Thanks for the advices, i've run the test (named -g after kill) and the
realize the zonecheck of the AFNIC.FR has passed.

 As I didn't do nothing in between, I guess  this was maybe a temporary
error of the AFNIC.FR zonecheck utility (which says UDP port 53 was not
reachable).

 Is there a mean to query the DNS Server on UDP port 53 with something like
dig ? so I can be sure that it's not my server that is wrong ?

I'll keep in mind the lsfo -i :53.
For nmap, the correct command was nmap -sU ns1 -p53


Thanks for your help,
Thomas.

On Thu, May 28, 2009 at 17:12, Peter Dambier <peter at peter-dambier.de> wrote:

> Hi Thomas,
>
> did you reboot or start/stop bind or kill?
>
> I remember having a named process dangling that kept me from
> receiving. After rebooting that worked again.
>
> with
>
> ps -elf | grep named
>
> you should see your named and how it was called:
>
> ps -elf | grep named
>
> 5 S hammer   4142     1  0  80   0 -  4142 -      May26 ?        00:00:05
> named -u hammer -c named.conf
>
> Now kill 4142, that is my named. Start named manually:
>
> named -u hammer -c named.conf -g
>
> That "-g" switch gets you a named console and you can
> see what goes wrong even if it does not write a log.
>
> "Control c" terminates bind and you can either start it without "-g" or
> whatever way you normally do.
>
>
> Kind Regards
> Peter
>
>
> Thomas Manson wrote:
> > Hi,
> >
> > I'm using BIND 9.5.0-P2 (on ubuntu server 8.04).
> >
> >  And the bind server do not listen anymore on the udp port.
> >
> > I've updated the /etc/bind/named.conf to add a domain, but didn't touch
> > the /etc/bind/named.conf.options.
> >
> > On localhost, when I use nmap I can see that the udp port is not listed.
> >
> > thomas at ns1:/etc/bind$ sudo nmap -sS localhost
> > [sudo] password for thomas:
> >
> > Starting Nmap 4.62 ( http://nmap.org ) at 2009-05-28 15:17 CEST
> > Warning: Hostname localhost resolves to 2 IPs. Using 127.0.0.1.
> > Interesting ports on localhost (127.0.0.1):
> > Not shown: 1709 closed ports
> > PORT     STATE SERVICE
> > 22/tcp   open  ssh
> > 25/tcp   open  smtp
> > 53/tcp   open  domain
> > 80/tcp   open  http
> > 953/tcp  open  rndc
> > 9102/tcp open  jetdirect
> >
> > Nmap done: 1 IP address (1 host up) scanned in 0.175 seconds
> > thomas at ns1:/etc/bind$
> >
> >
> > Does anyone have an idea of what's going on ?
> >
> > I can't figure out why this stop working as before.
> >
> > Maybe it's trivial, but as it's not my fulltime job to manage these dns
> > servers (and have so much other thing to deal with), so help would be
> > appreciated.
> >
> > Regards,
> > Thomas.
> >
> >
> > ------------------------------------------------------------------------
> >
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> --
> Peter and Karin Dambier
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