Using TCP for checking

I'm involved in the CO.ZA Registry. In the process of registering a domain name in the co.za zone - we do a bunch of DNS checks using 'dig'. for each nameserver, a) check that the zone exists (fetch the SOA), b) fetch the NS RRSet count and compare entries. c) if Nameserver inside the

Re: Using TCP for checking

My one caution on this would be you may run into false negatives with TCP if people have misconfigured firewalls. It's surprising the number of people out there that believe TCP is only for xfers. -- -Ben Croswell On Tue, Apr 7, 2009 at 3:17 PM, Mark Elkins m...@posix.co.za wrote: I'm