From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antony Stone Subject: Re: Blocking programs with IPtables Date: Fri, 30 Jul 2004 15:48:04 +0100 Sender: netfilter-admin@lists.netfilter.org Message-ID: <200407301548.04847.Antony@Soft-Solutions.co.uk> References: <410A5D82.4050109@alimentos-granix.com.ar> Reply-To: netfilter@lists.netfilter.org Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <410A5D82.4050109@alimentos-granix.com.ar> Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="iso-8859-1" To: netfilter@lists.netfilter.org On Friday 30 July 2004 3:38 pm, Leonardo Teves wrote: > Hi, > I=B4m new in this forum, and i have a little question. > Is there a way to block some programs with Iptables? > I want to block Microsoft Outlook recovering mail from Imap server. > I want to force all users to use Thunderbird as mail client without > deinstalling Outlook from every workstation. > Is my question clear? > Any ideas? Your question is clear. This cannot be done with netfilter (because all imap connections look the= same=20 to netfilter, no matter what client or server software is being used) I cannot think of another way to do it either, because I would be surpris= ed if=20 Outlook sent anything in its connect message to identify itself as Outloo= k=20 (the server end of a connection often does, but the client end usually=20 doesn't, except for web browsers). Sorry - but perhaps someone else here can prove me wrong? Regards, Antony. --=20 Microsoft may sell more software than any other company, but McDonald's s= ell=20 more burgers than any other company, and I think the other similarities a= re=20 obvious... Please reply to the = list; please don't C= C me.