Wilkinson, Alex wrote:
0n Mon, Feb 15, 2010 at 01:40:31PM +0100, Michelle Sullivan wrote:
>Michelle Sullivan wrote:
>michelle@enigma:~$ dig +trace +bufsize=512 -x 81.255.164.225 >michelle@enigma:~$ dig +bufsize=4096 -x 81.255.164.225 @NS3.NIC.FR
Curious, why did you modify 'bufsize' ?
Well I started here: http://sel.icann.org/node/715#fn1 and figured that it was a way to force the packet size and protocol so that I could fit it to known constraints in the PIX eg: Fix to 512 bytes and if the PIX is rejecting anything over 512 bytes there is a simple answer. Fix to 4096 bytes and it forces to EDNS (v0) - as can be seen in the output, to see if the PIX is just dropping all EDNS.. obviously the resulting size sent back I cannot control (except by limiting the maximum size), so the next step was to query all (or a selection) of the servers being traced through. What I can't figure out is why I can query the servers directly and get a response but the trace fails. Any insight will be greatly appreciated. Michelle