Bind, Plesk for Windows and Server Fail Error

Kevin Darcy kcd at daimlerchrysler.com
Tue Aug 31 02:12:50 UTC 2004


Dai wrote:

>Hi Everyone,
>
>We're running Plesk Server Administrator 6.5 for Windows 2000 on a
>server that uses BIND 9.2.2.  Every month, one of our domains stops
>working.  Slowly each A record stops responding to pings and
>ns-lookups, until the domain disappears completely.
>
>The domain name (youryouthcouncil.org.uk) is set to use
>ns1.hostia.co.uk [80.253.122.3] and ns2.hostia.co.uk [80.253.122.4] as
>its nameservers.
>
>this is the dns file for the domain name:
>
>////////////////////////////////////////////////////
>$TTL	86400
>
>@	IN	SOA	ns1.hostia.co.uk. admin.hostia.co.uk. (
>			1092220081	; Serial
>			10800	; Refresh
>			3600	; Retry
>			604800	; Expire
>			86400)	; Minimum
>
>youryouthcouncil.org.uk.		 IN NS	 ns1.hostia.co.uk.
>youryouthcouncil.org.uk.		 IN NS	 ns2.hostia.co.uk.
>youryouthcouncil.org.uk.		 IN A	 80.253.122.3
>webmail.youryouthcouncil.org.uk.		 IN A	 80.253.122.3
>mail.youryouthcouncil.org.uk.		 IN A	 80.253.122.3
>ns.youryouthcouncil.org.uk.		 IN A	 80.253.122.3
>admin.youryouthcouncil.org.uk.		 IN A	 80.253.122.3
>ftp.youryouthcouncil.org.uk.		 IN CNAME	 youryouthcouncil.org.uk.
>admin.youryouthcouncil.org.uk.		 IN CNAME	 youryouthcouncil.org.uk.
>www.youryouthcouncil.org.uk.		 IN CNAME	 youryouthcouncil.org.uk.
>youryouthcouncil.org.uk.		 IN MX	10 mail.youryouthcouncil.org.uk.
>////////////////////////////////////////////////////////////////////////
>
>This is the zone file (named.conf)
>////////////////////////////////////////////////////////////////////////
>zone "youryouthcouncil.org.uk" {
>	type master;
>	file "C:\Program Files\SWsoft\Plesk\dns\var\youryouthcouncil.org.uk";
>	allow-transfer {
>		80.253.122.3;
>		80.253.122.4;
>		common-allow-transfer;
>	};
>};
>acl common-allow-transfer {
>	none;
>};
>////////////////////////////////////////////////////////////////////////
>
>when you try to do an nslookup you get:
>
>*** ns1.hostia.co.uk can't find youryouthcouncil.org.uk: Server failed
>*** ns2.hostia.co.uk can't find youryouthcouncil.org.uk: Server failed
>
>i ran a dns report on dnsreport.com and all i got was:
>[ERROR: The parent servers do not have any NS records for
>youryouthcouncil.org.uk. This DNS Report only works for domains with
>nameservers (such as example.com), not hostnames such as
>www.example.com, or IPs such as 198.168.12.14.]
>
>any ideas of what is going on?
>
>we have several other domains using the same bind dns server and they
>are all working fine.
>
Looks OK to me. I checked the basic stuff manually using "dig", and then 
ran a DNS report from dnsreport.com. The only red (== FAIL) thing that 
dnsreport.com flagged was relatively pedantic ("The IP of one or more of 
your mail server(s) have no reverse DNS (PTR) entries").

I suspect hostia.co.uk is having intermittent connectivity/networking 
problems. Looks like both of those nameservers are on the same subnet 
(identical addresses except .3 versus .4 as the last octet, traceroutes 
look identical too, up through the second-to-last hop), going through 
the same NAT or load-balancer or some other single point of failure...

                                                                         
                                          - Kevin

                                                                         
                                                   - Kevin



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