Re: IPFW almost works now -> stateful rules

From: Crist Clark (
Date: 06/14/01

Date: Thu, 14 Jun 2001 09:51:44 -0700
From: "Crist Clark" <>
To: Peter Pentchev <>

Peter Pentchev wrote:
> On Thu, Jun 14, 2001 at 11:59:28AM -0400, Igor Roshchin wrote:
> >
> >
> > If those rules are all rules you have,
> > and I didn't miss any line,
> > no ftp would be allowed to go through, since
> > there is no rule for the port 21.
> > Aren't you mixing something ? ftp is at port 21.
> > Port 22 is ssh.
> > (Check /etc/services)
> >
> > However, I am puzzled, how do you manage to establish the initial connect
> > at all.
> This has been discussed before: his FTP server is listening on a high port.

But his tcpdump(8) output indicates the 'ftp' port is being used...
I hope he didn't edit /etc/services (yee-uck).

Crist J. Clark                                Network Security Engineer                    Globalstar, L.P.
(408) 933-4387                                FAX: (408) 933-4926
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