Re: Per application TCP/IP traffic filtering in Linux (sort of personal firewall)

From: aborka (aborka@hotmail.com)
Date: 04/27/02 

From: aborka@hotmail.com (aborka)
Date: 27 Apr 2002 09:59:04 -0700

MM <R807_T345@hotmail.com> wrote in message news:<L0ry8.11580$VF6.83844241@news-text.cableinet.net>...
> In article <3Wqy8.39766$1u2.1210501@news1.calgary.shaw.ca>, Richard Pitt wrote:
> > On Fri, 26 Apr 2002 21:39:12 -0700, MM wrote:
> >
> > Well, if it helps, you can turn off image downloads in Evolution -
> > tools-mailsettings-display. This should stop much of the mayhem that
> > spammers inflict by single byte gifs for logging and such.
> >
>
> Uhm, isn't that what I said? Why did you a) reply to my message and then
> b) cut out my reply and replace it with yours?
>
> MM

Thanks for the answers guys. However, as MM mentioned, it seems there
is no way to do it as simple as installing a "Windows like" personal
firewall/filter on Linux. Or to do it at all.
The example I used was just one scenario, there can be others too.
The idea is that if I use "APPLICATION A" which uses some ports to
communicate to the outside world and I also use "APPLICATION B" which
uses some ports too and some of these ports overlap with "APPLICATION
A" I would like to disable "APPLICATION B" to talk on the overlapping
ports.
Also, I would like to catch any application which I did not
specifically enabled to talk to the outside world when it's trying to.
I know, this is very "Windows like" paranoia which has no such a big
probability to happen in Linux but who can check all programs' source
code coming with a Linux distribution? I bet, 90% of the people using
Linux did not check a single line of source code they use.
Anyway, it would be great to have such kind of "personal
firewall/filter" for Linux. This would increase the number of people
using Linux as they everyday desktop/development machine.
I don't know the basics of how to do this task, but I am sure it can
be done. If even Windows can do it... :)

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