From: Nick Drage <nickd@funkyjesus.org>
To: netfilter@lists.netfilter.org
Subject: Re: How to block Yahoo Messenger through IP Tables
Date: Sun, 6 Oct 2002 12:27:10 +0100 [thread overview]
Message-ID: <20021006122710.A3805@funkyjesus.org> (raw)
In-Reply-To: <1033808433.2973.4.camel@localhost.localdomain>; from Krishna_shekhar@vsnl.net on Sat, Oct 05, 2002 at 05:00:31AM -0400
On Sat, Oct 05, 2002 at 05:00:31AM -0400, Krishna wrote:
> But why do you want to do that? If you want to block a particular
> port then either disable it in inetd or xinetd. Or make rules
> for that destination port to DROP packets.
As the OP stated, the Linux box is being used as a gateway. The Yahoo
Messenger servers are out on the Net, so you'll need to block traffic going
through the host, so inetd and xinetd won't help.
> > Sorry for asking this newbie question first.
> >
> > I am running a network with a Linux Server as a gateway. I am using
> > IPtables as to masquerade internal IPs for Internet usage. I want to
> > block the uses of my intranet for using yahoo messenger. I needed help
> > for this. In general i wanted to know how to block a particular port.
It's not a newbie question at all, and sounds very familiar. Have you
Googled for it throughly? IIRC Yahoo Messenger tries some interesting ways
to get through firewalls - so you might want to filter on destination IP, or
do some kind of content matching fun. I would expect a lot of people are up
against similar problems so someone will have found a solution already if
there's one to be found.
--
FunkyJesus System Administration Team
prev parent reply other threads:[~2002-10-06 11:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-05 15:59 How to block Yahoo Messenger through IP Tables Alok Shukla
2002-10-05 9:00 ` Krishna
2002-10-06 11:27 ` Nick Drage [this message]
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