* William Herrin: > On Mon, May 2, 2011 at 1:13 PM, Florian Weimer <[email protected]> wrote: >> * William Herrin: >>> Anyone else having trouble with .gov DNS failing with edns-udp-size >>> set to 512? >> >> You need an UDP size of at least 1220 for DNSSEC, see RFC 3226, >> section 3. A query that advertises a smaller buffer size is >> non-compliant. BIND will send such queries, but this is a >> controversial feature.
> I have "dnssec-enable no;" in my bind config. It does not seem to have the intended effect. > Were you able to determine from the tcpdump output that DNSSEC was > being requested? [udp sum ok] 10320 [1au] A? www.nsf.gov. ar: . OPT UDPsize=512 OK (40) 11:53:01.690414 IP (tos 0x0, ttl 249, id 28744, offset 0, flags "OK" means that DO=1 was set.
