Hello,
I have got a debian potato firewall / mailserver running for a couple of
months now. It ran without any trouble until a few days ago. Suddenly dns
does not work anymore (I use bind 8.2.3-0.potato.1 as a caching only
nameserver). When I do a nslookup on www.debian.org for example, I get the
following result:
> www.debian.org
Server: localhost
Address: 127.0.0.1
*** localhost can't find www.debian.org: No response from server
>
I have added some -l rules to my ipchains script to find out what is
happening. The dns requests from my debian box to my isp's dns server seems
to be ok (masquaraded udp request to port 53 of the ip address of my isp's
dns server). However, the dns server seems to respond only with a icmp
packet on port 3:
Jun 14 16:50:45 debian kernel: Packet log: input - ppp0 PROTO=1
194.178.9.133:3 62.45.15.91:3 L=56 S=0x00 I=21704 F=0x0000 T=63 (#1)
I would expect the dns server to respond with an udp packet on port 53. I
am not sure about that however, because I do not know much about dns. If I
keep trying to resolve an address it sometimes works and once the address
is in the cache on my debian box I can keep resolving that address without
problems.
I have connected my modem to a windoze box directly and it worked without
problems.
Can anybody tell what could be wrong here please? I have not changed a
thing on my debian box before it stopped working correctly.
TIA,
Robert-Jan Kuijvenhoven
