Hi Martin, > I may be wrong, but doesn't DNS use TCP if the answer to a query > exceeds a certain length?
Yes. If the resolver receives a truncated response (TC bit set) it is supposed to re-do the query via TCP. You are out of luck if your resolver thinks: 'What the hell is a TC bit?! I'll just try to parse the response and pretend that there was no TC bit set. Harr harr..' This works (somewhat) if the response came from BIND: $ dig -x 220.127.116.11 +short +ignore @cns1.bluewin.ch |grep -vc '^;;' 14 But it fails if dnscache sent the response: $ dig -x 18.104.22.168 +short +ignore @fdad:ecad:e0fb:adf0::f00 |grep -vc '^;;' 0 (dnscache does not include a 'stripped down' response: http://cr.yp.to/djbdns/notes.html => Truncation) Regards, Adrian _______________________________________________ swinog mailing list email@example.com http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog