On Wed, Mar 26, 2008 at 06:42:57PM +0100, Martin Ebnoether wrote: > On the Wed, Mar 26, 2008 at 02:42:36PM +0100, Tonnerre Lombard blubbered: >
... > > It is also a DNS issue, depending on the number of results returned; > > the size of a DNS/UDP response is limited to 1 UDP packet, which again > > is limited in size. Not everyone uses DNS over TCP, and it is unlikely > > to be adapted just because of such a stupid and useless SPAM filtering > > measure. > > While Xari's Setup with tons of PTR records is plain stupid. > Xari, you should have a read about MX records. =:-) > > But DNS uses UDP and TCP as I just checked. RFC 1035, Chapter 4.2 says: > "The Internet supports name server access using TCP [RFC-793] on > server port 53 (decimal) as well as datagram access using UDP [RFC-768] > on UDP port 53 (decimal)." > Until recently only AXFR was using tcp, normaly resolver queries had to be udp. This rule was a bit relaxed because of the increased space needed for IPv6 but many authorative dns servers will only listen to UDP port 53 requests.. -- :wq Claudio _______________________________________________ swinog mailing list [email protected] http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
