[9fans] dns on outside network hangs

[9fans] dns on outside network hangs

[Brantley Coile]

We have two machines, atlas and baron, on an outside
network.  They are our dns servers.  Every few days they
both stop answering dns requests and I have to reboot
them.   Any one using the dns to the outside?  Any one
seen this problem?

 Brantley

Re: [9fans] dns on outside network hangs

[Geoff Collyer]

I've been running dns on outside networks for years and have not seen
this.  Are you getting complaints in /sys/log/dns?

Re: [9fans] dns on outside network hangs

[Geoff Collyer]

Other things to check: are the dns processes in Broken state when the
stop answering?  Are your ndb binaries up to date?

; ls -l /bin/ndb
--rwxrwxr-x M 55411 geoff sys 147261 Jul  7 20:32 /bin/ndb/cs
--rwxrwxr-x M 55411 sys   sys  59444 May 20 11:18 /bin/ndb/csquery
--rwxrwxr-x M 55411 geoff sys 218031 Jul  7 20:32 /bin/ndb/dns
--rwxrwxr-x M 55411 geoff sys 192630 Jul  7 20:32 /bin/ndb/dnsdebug
--rwxrwxr-x M 55411 sys   sys  61758 May 20 11:18 /bin/ndb/dnsquery
--rwxrwxr-x M 55411 geoff sys 191267 Jul  7 20:32 /bin/ndb/dnstcp
--rwxrwxr-x M 55411 geoff sys  93556 Jul  7 20:32 /bin/ndb/ipquery
--rwxrwxr-x M 55411 sys   sys  61950 May 20 11:18 /bin/ndb/mkdb
--rwxrwxr-x M 55411 sys   sys  81983 May 20 11:18 /bin/ndb/mkhash
--rwxrwxr-x M 55411 sys   sys  82972 May 20 11:18 /bin/ndb/mkhosts
--rwxrwxr-x M 55411 sys   sys  81067 May 20 11:18 /bin/ndb/query

Re: [9fans] dns on outside network hangs

[Richard Miller]

> We have two machines, atlas and baron, on an outside
> network.  They are our dns servers.  Every few days they
> both stop answering dns requests and I have to reboot
> them.   Any one using the dns to the outside?  Any one
> seen this problem?

I found a similar problem when I configured my dns server purely
as a relay for my ISP's dns server.  I came close to tracking
down the cause, but the simple workaround was to add the
root servers to /lib/ndb/local as a fallback.

-- Richard

Re: [9fans] dns on outside network hangs

[Brantley Coile]

> Are your ndb binaries up to date?

They weren't.  I've recompiled everything now, so we'll see.

Thanks.