From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Seferovic Edvin" <edvin.seferovic@kolp.at>
Subject: blocking traffic between two internal interfaces ?
Date: Thu, 20 Oct 2005 05:07:17 +0200
Message-ID: <14162.9181722694$1129777685@news.gmane.org>
Reply-To: edvin.seferovic@kolp.at
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Hi,

 

I have two internal interfaces ( eth1 // 172.19.0.0 & eth2 // 172.20.0.0 ),
and I would like to block traffic between those two networks. Somehow Ive
failed because any rules that should forbid traffic between those 2 networks
didn't work. I still could access webserver on the eth2 - 172.20.10.1 from a
station with IP address 172.19.1.100 ! Then Ive applied rule in PREROUTING
chain in nat table:



Iptables -t nat -A PREROUTING -s 172.19.0.0/16 -d 172.20.0.0/16 -j DROP

 

Rules in FORWARD and INPUT chain just wouldn't work. Is this the right way
to forbid traffic from one network to the another or am I missing some basic
stuff here? I would appreciate any comments.

 

Thank you in advance !

 

Regards,

 

Edvin Seferovic