Subject: Re: Traceroute difficulties
To: Dave Huang <>
From: Steven M. Bellovin <>
List: netbsd-users
Date: 01/09/2003 06:58:26
In message <>, Dave Huang writes:

>Hmm... if you can ping it, there must be a route to it... the only thing
>I can think of is that the other end is sending back ICMP destination
>unreachable when you try to connect to port 25. 

Some firewalls do that.

		--Steve Bellovin, (me) (2nd edition of "Firewalls" book)