In article <gtrqte$2in...@sf1.isc.org>, Sam Wilson <sam.wil...@ed.ac.uk> wrote:
> In article <gtrbsa$296...@sf1.isc.org>, Mark Elkins <m...@posix.co.za> > wrote: > > > One place that TCP may make sense - if you are involved in a registry > > system and the process involves actually checking the information that > > you are given, including nameservers (do they exist, do they serve that > > zone - correctly?) - it may make a lot of sense to do TCP Digs for the > > information (though that should probably be after a failed UDP dig - as > > a number of people do insist on disallowing Port 53 TCP). > > If the registry is testing for compliant servers then a failed TCP query > should flag the server as non-working, as would a failed UDP query. DNS servers MUST support UDP, and only SHOULD support TCP. So a failed TCP query should not flag the server as non-working. -- Barry Margolin, bar...@alum.mit.edu Arlington, MA *** PLEASE don't copy me on replies, I'll read them in the group *** _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
