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Re: two ethernet without routing



On Wed, 2002-03-13 at 11:27, jsalord@publicom1010.com wrote:
> 
> There have to be some kind of routing now because I can connect to my apache
> typing the two IPs even I've just one cable connected to eth0.

You have to explicitely block and log spoof attempts. For example, if
you have eth0 on 192.168.0.0/24 and eth1 on 192.168.1.0/24

/sbin/iptables -A INPUT -i eth1 -s 192.168.0.0/24 -j LOG
/sbin/iptables -A INPUT -i eth1 -s 192.168.0.0/24 -j DROP
/sbin/iptables -A INPUT -i eth0 -s 192.168.1.0/24 -j LOG
/sbin/iptables -A INPUT -i eth0 -s 192.168.1.0/24 -j DROP

This way packets will only be accepted if they come in through the
"right" interface, and you will be alerted if some don't.

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