> Try adding 150 PTR records for a given IP address and watch all hell > break loose. :-) > > (The large reply will make the DNS server want to fall back to TCP, > which is blocked by a lot of firewalls whose admins forget (if they > ever knew) that DNS can run over TCP as well as UDP.)
Wearing the DNS hat as well as mail, I made damn sure that the firewalls allowed 53 TCP and UDP. I would think that if they are blocking TCP, they would have been seeing some odd behavior already. _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
