What does bind try to do if the client specifies a udp size of less than 512? I’ve been trying queries and here is what I’ve seen:
I have a query that ordinarily receives a response with an answer section and an authority section, the response length being ~ 500. If I specify a udp size of 200, then I receive the same answer section, but minus the authority section. But the received length is greater than 200, and the tc flag is not set. (In contrast to this, if I try a different query that gets a truly long answer, specifying a udp size of 512, then I do get a response with the tc flag set and with no answer-section lines.) I’ve been looking at a customer's reported problem, testing scenarios and behavior that might explain it, so this is a bit of an academic question just to know what to expect from bind. The actual problem is likely (in my mind) to be a firewall or client configuration. FYI: $ ./named -v BIND 9.9.8-P4 (Extended Support Version) <id:deea0d7> John Wobus Cornell University IT _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users