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v2930, DNS issue

  • joewilliams
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14 Dec 2010 17:28 #65254 by joewilliams
v2930, DNS issue was created by joewilliams
I have a problem with the DNS forwarder on our 2930.

DNS queries regularly time out, and queries for MX records don't resolve at all, meaning that our mail server cannot send mail using the 2930 as a DNS server.

For example:
Code:
C:\>dig @192.168.3.1 gmail.com mx ; <<>> DiG 9.3.2 <<>> @192.168.3.1 gmail.com mx ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1110 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;gmail.com. IN A ;; ANSWER SECTION: gmail.com. 60 IN A 209.85.146.17 ;; Query time: 5 msec ;; SERVER: 192.168.3.1#53(192.168.3.1) ;; WHEN: Tue Dec 14 17:23:52 2010 ;; MSG SIZE rcvd: 44


whereas the same query to our ISP's DNS server returns:
Code:
C:\>dig @83.218.143.36 gmail.com mx ; <<>> DiG 9.3.2 <<>> @83.218.143.36 gmail.com mx ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1950 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 9 ;; QUESTION SECTION: ;gmail.com. IN MX ;; ANSWER SECTION: gmail.com. 1586 IN MX 10 alt1.gmail-smtp-in.l.google.com. gmail.com. 1586 IN MX 20 alt2.gmail-smtp-in.l.google.com. gmail.com. 1586 IN MX 30 alt3.gmail-smtp-in.l.google.com. gmail.com. 1586 IN MX 40 alt4.gmail-smtp-in.l.google.com. gmail.com. 1586 IN MX 5 gmail-smtp-in.l.google.com. ;; AUTHORITY SECTION: gmail.com. 172962 IN NS ns2.google.com. gmail.com. 172962 IN NS ns3.google.com. gmail.com. 172962 IN NS ns4.google.com. gmail.com. 172962 IN NS ns1.google.com. ;; ADDITIONAL SECTION: gmail-smtp-in.l.google.com. 109 IN A 209.85.229.27 alt1.gmail-smtp-in.l.google.com. 109 IN A 74.125.77.27 alt2.gmail-smtp-in.l.google.com. 109 IN A 74.125.127.27 alt3.gmail-smtp-in.l.google.com. 109 IN A 209.85.225.27 alt4.gmail-smtp-in.l.google.com. 109 IN A 74.125.67.27 ns1.google.com. 157142 IN A 216.239.32.10 ns2.google.com. 155321 IN A 216.239.34.10 ns3.google.com. 157142 IN A 216.239.36.10 ns4.google.com. 155321 IN A 216.239.38.10 ;; Query time: 23 msec ;; SERVER: 83.218.143.36#53(83.218.143.36) ;; WHEN: Tue Dec 14 17:27:00 2010 ;; MSG SIZE rcvd: 366


Any ideas what the problem could be?

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