From: Gregory Nowak <greg@romuald.net.eu.org>
To: "Speakup is a screen review system for Linux." <speakup@braille.uwo.ca>
Subject: Re: iptables?
Date: Sun, 25 Mar 2007 16:39:04 -0700 [thread overview]
Message-ID: <20070325233903.GB20873@localhost.localdomain> (raw)
In-Reply-To: <00bc01c76f2e$1156d2f0$6701a8c0@blanchew2fs98i>
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I think I see the problem.
Basically, you want to use --dport, instead of --sport. For example,
the way you have it now:
iptables -A INPUT -p tcp --sport 20:22 -j ACCEPT
means that you'd be accepting connections with source ports 20:22. If
I understand tcp/ip correctly, that could never happen with those
ports, I think they're used only for responding to already initiated
connections. So, if what you want to do is to allow connections on
ports 20:22 in this example into your box, use --dport.
Greg
On Sun, Mar 25, 2007 at 03:36:43PM -0700, Littlefield, Tyler wrote:
> Hello list,
> I've got the following iptables set.
> iptables -F
> iptables -A INPUT -p tcp --sport 20:22 -j ACCEPT
> iptables -A INPUT -p tcp --sport 80 -j ACCEPT
> iptables -A INPUT -p tcp --sport 110 -j ACCEPT
> iptables -A INPUT -p tcp --sport 3784 -j ACCEPT
> iptables -A INPUT -p tcp --sport 443 -j ACCEPT
> iptables -A INPUT -p tcp --sport 6666:6670 -j ACCEPT
> iptables -A INPUT -p tcp --sport 10000 -j ACCEPT
> iptables -A INPUT -p tcp --sport 20000 -j ACCEPT
> iptables -P INPUT DROP
> iptables -P OUTPUT ACCEPT
> I'm dmzed, and when I run this, it puts everything to filter.
> Any idea what I'm doing wrong?
> Thanks,
> ~~TheCreator~~
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
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next prev parent reply other threads:[~ UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
iptables? Littlefield, Tyler
` Gregory Nowak [this message]
` iptables? Anthony Creapeau
` iptables? Gregory Nowak
` iptables? Ralph W. Reid
` iptables? Littlefield, Tyler
` iptables? Ralph W. Reid
` iptables? Littlefield, Tyler
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