[4576] in linux-net channel archive
Re: IP Masquerading: No good for FTP?
daemon@ATHENA.MIT.EDU (Jos Vos)
Mon Sep 30 02:36:58 1996
From: Jos Vos <jos@xos.nl>
To: rsteffen@ia.net
Date: Sun, 29 Sep 1996 16:25:48 +0100 (MET)
Cc: linux-net@vger.rutgers.edu
In-Reply-To: <19960929150724.8177.qmail@servo.dodger.com> from "rsteffen@ia.net" at Sep 29, 96 10:07:23 am
> > No, you're not right. You described the problem, but you don't seem to
> > know that there is (since long) a solution: the ip_masq_ftp module, that
> > you need to load to make active FTP working.
> >
> > The same (loading a special module) is needed for IRC and RealAdudio.
> > The modules are included in the standard kernel (2.0.x) and you need
> > to do "make modules" to generate them.
>
> But, the ip_masq_ftp module doesn't keep the command channel from timing
> out. And, with the default timeouts on tcp connections, this means that you
> can't transfer more than 1.5MB over a 28.8 PPP line without losing the
> having ftp hang after the transfer. (Big problem for things like netscape,
> that delete the downloaded file in this case.) You have to extend the tcp
> timeout to do any useful ftping on a slow link.
- Netscape uses FTP in passive mode.
- The TCP timeout values can be set with ipfwadm.
--
-- Jos Vos <jos@xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
