Weird DNS Problems
barmar at alum.mit.edu
Wed Dec 15 12:40:44 UTC 2004
In article <cpp9c6$2c2f$1 at sf1.isc.org>,
D McDonald <renski at sdf.lonestar.org> wrote:
> Sorry if this is a repeat, I signed up with renski at freeshell.org, and then
> tried to send it out as renski at sdf
> Hi All,
> About a week ago we switched the DNS server of our domain saturncorp.com to
> ns.saturncorp.com. It's a redhat
> machine running bind 9.2.3. However it now seems that on some DNS servers are
> unable to resolve some addresses.
> For example on one isp www.saturncorp.com works fine (non-auth), but
> ftp.saturncorp.com doesnt work. It appears
> that some of these servers are running on cache alone, im not sure. This is
> only the second BIND server ive set
> up, and the first was a internal server. Below is my config file..
You still have the AT&T nameservers listed in your domain delegation,
but they're not slaving off your server. Contact AT&T and get them to
update their configuration.
> $TTL 43200
> @ IN SOA 22.214.171.124 sysop at saturncorp.com. (
That should be:
@ IN SOA ns.saturncorp.com. sysop.saturncorp.com. (
> 14 ; serial
> 600 ; refresh, 2 minutes (TEMP VALUE FOR
> 60 ; retry (TEMP)
> 3600000 ; expire
> 43200 ; ttl, 12 hours MAX for caching (TEMP)
> @ IN A 126.96.36.199
> IN NS 188.8.131.52
NS records must point to hostnames, not addresses. That's being treated
IN NS 184.108.40.206.saturncorp.com.
You should also list the slave nameservers in NS records.
> IN MX 1 saturn3.saturncorp.com.
> saturn3 IN A 220.127.116.11
> saturn4 IN A 18.104.22.168 ; this is not a typo
> ; saturn1 22.214.171.124 ; internal use only
> ; WVC WWW 126.96.36.199
> www IN A 188.8.131.52
> smartsystem IN A 184.108.40.206
> ns IN A 220.127.116.11
> ns2 IN A 18.104.22.168
If you have a second nameserver, why don't you list it in the NS records?
> webplus2 IN A 22.214.171.124
> webplus3 IN A 126.96.36.199
> ; lpar3 also 188.8.131.52
> lpar3 IN A 184.108.40.206
> lpar4 IN A 220.127.116.11
> lpar1ftp IN A 18.104.22.168
> lpar3ftp IN A 22.214.171.124
> lpar4ftp IN A 126.96.36.199
> ftp3 IN A 188.8.131.52
> ftp2 IN A 184.108.40.206
> lpar1 IN A 220.127.116.11
> ftp IN A 18.104.22.168
> vr IN A 22.214.171.124
> If you set the server as your dns server it works fine, and ive checked the
> domain under whois,
> and the first listed server is ns.saturncorp.com. I just dont get it. If
> anyone can see
> something im doing wrong, id be most grateful.
Barry Margolin, barmar at alum.mit.edu
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