dns MX caching issue
mayer at gis.net
Fri Feb 15 01:37:22 UTC 2002
The last time I looked, within the last week, interland.net had major
configuration problems. This makes it look like the situation hasn't
At 01:56 AM 2/14/02, Michael Harris wrote:
>I have done a good deal of searching on this issue but alas must
>turn to the world forum to get an answer. We run a fax to email
>and have had chronic problems delivering to the domain
>but I cannot tell precicely why. What I see happening is we can
>their MX for an hour or so and then cannot, and a restart of my name
>fixes the problem until it occurs again. I am running bind-9.1.0-10
>and deliver tens of thousands of emails per day resolving using the
>same server. When it occurs a cache dump shows no MX entry for the
>and after a server restart and a lookup the MX is listed in the cache.
>A whois on the domain lists the following as registered dns servers
>(on network solutions):
> DNS1.INTERLAND.NET 22.214.171.124
> DNS2.INTERLAND.NET 126.96.36.199
>however an SOA query to either of these servers for worthfunding.com
>up the following mismatch for NS records:
>[asphalt 124] dig -t soa worthfunding.com @188.8.131.52
>; <<>> DiG 9.1.0 <<>> -t soa worthfunding.com @184.108.40.206
>;; global options: printcmd
>;; Got answer:
>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48180
>;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3
>;; QUESTION SECTION:
>;worthfunding.com. IN SOA
>;; ANSWER SECTION:
>worthfunding.com. 900 IN SOA a.ns.interland.net.
>hostmaster.interland.net. 5 3600 4 604800 900
>;; AUTHORITY SECTION:
>worthfunding.com. 86400 IN NS a.ns.interland.net.
>worthfunding.com. 86400 IN NS b.ns.interland.net.
>worthfunding.com. 86400 IN NS c.ns.interland.net.
>;; ADDITIONAL SECTION:
>a.ns.interland.net. 900 IN A 220.127.116.11
>b.ns.interland.net. 900 IN A 18.104.22.168
>c.ns.interland.net. 900 IN A 22.214.171.124
>;; Query time: 28 msec
>;; SERVER: 126.96.36.199#53(188.8.131.52)
>;; WHEN: Wed Feb 13 23:52:10 2002
>;; MSG SIZE rcvd: 193
>So the NS records listed by this authoritative server does not include
>of the registered authority servers. I do not know if/why this is a
>but looking at several major ISP domains the servers listed always
>between the registration and that returned by the SOA to an authority.
>Also reverse lookups for 184.108.40.206 and 220.127.116.11 turn up
>www.autographplanet.com and nothing, respectively.
>Does this or anything about their listing jump out as a problem to
>Thanks in advance for any advice.
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