In article <[email protected]>, Sam Wilson <[email protected]> wrote:
> In article <[email protected]>, Mark Elkins <[email protected]> > 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, [email protected] Arlington, MA *** PLEASE don't copy me on replies, I'll read them in the group *** _______________________________________________ bind-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/bind-users
