Subject: talk not defaulting to 'localhost' not honoring an explicit 'localhost' request.
To: None <email@example.com>
From: Nate Hill <firstname.lastname@example.org>
Date: 09/26/2003 19:31:20
I'm trying to get talk to work using the loopback interface. I want to
block all incoming udp traffic on my external interface and, this
seems to disable the use of talk. Further inspection reveals:
26/09/2003 19:25:57.215408 pppoe0 @1:8 p
Cirrus.Mine.Nu[18.104.22.168],ntalk PR udp len 20 112 IN
26/09/2003 19:25:57.215685 pppoe0 @2:3 p
Cirrus.Mine.Nu[22.214.171.124],52158 PR udp len 20 52 OUT
which confirms my suspicions. All requests originate from and are
destined to 'Cirrus.Mine.Nu' (external address) wether I append user@
with localhost or 127.0.0.1.
It seems that talk should in fact be defaulting to a local interface
and in any case it should definitely not ignore my explicit @host
ps: I know that the packets aren't actually leaving pppoe0 but, it's
just plain stupid and complicates my filtering rules.