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Date: Sat, 30 Apr 2011 22:50:10 -0700
From: Matt Connor <bsd@xerq.net>
To: <freebsd-net@freebsd.org>
In-Reply-To: <466DA43B-EFF4-45DB-83C7-D6DD2B86CB35@bitblocks.com>
References: <466DA43B-EFF4-45DB-83C7-D6DD2B86CB35@bitblocks.com>
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Subject: Re: Strange DNS problem
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> 21:45:14.662220 IP 192.168.125.253.20204 > 192.168.125.9.53: 16136+
> A? weather.com. (29)
> 21:45:14.662696 IP 192.168.125.9.53 > 192.168.125.253.20204: 16136
> ServFail 0/0/0 (29)

ServFail means the authoritative DNS servers for that domain aren't 
responding.

> 21:45:14.663090 IP 192.168.125.253.59705 > 192.168.125.9.53: 4383+ A?
> weather.com.bitblocks.com. (43)
> 21:45:14.663193 IP 192.168.125.9.53 > 192.168.125.253.59705: 4383
> NXDomain* 0/1/0 (94)

NXDomain means that the root servers aren't providing any authoritative 
name servers for this domain (because it's appending your domain).

Did you set your local DNS server to use forwarders? Also, are all your 
DNS records properly appended with a period (for instance 1.1.1.1 A 
bitblocks.com.)?

Can you provide the output (on a UNIX machine) of: dig @192.168.125.9 
weather.com +trace

-Matt