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Ive got a Dedicated Server with 2 Public IP Adresses and would like to route all eth0:1 traffic to a KVM Guest via iproute2 or even iptables. Outgoing Traffic should also be routed to eth0:1 - eth0 and eth0:1 are assigned in different Subnets.

Setup is/should be as following: 178.1.2.3 eth0:1 <-> 192.168.1.254 br1, gateway for tap1 <-> 192.168.1.1 KVM Guest

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2 Answers 2

This seems way too complex. Just bridge the VM and set the IP address in the guest.

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it actually was surprisingly simple:

-A PREROUTING -d 178.1.2.3/32 -j DNAT --to-destination 192.168.1.1
-A POSTROUTING -s 192.168.1.1/32 -j SNAT --to-source 178.1.2.3

thanks anyway!

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Yeah, and now you have completely unnecessary NAT which is going to make your life more difficult later. :) –  Michael Hampton Oct 21 '12 at 16:53

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