From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dean Rantala Subject: guest <-> guest communication problem Date: Thu, 04 Feb 2010 11:06:48 -0600 Message-ID: <7b07e473a9d1bd72b412c822ae42bbc4@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To: Return-path: Received: from atlantis.supergluetech.com ([63.135.182.235]:60363 "EHLO atlantis.supergluetech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751667Ab0BDRGt (ORCPT ); Thu, 4 Feb 2010 12:06:49 -0500 Received: from atlantis.supergluetech.com (localhost [127.0.0.1]) by atlantis.supergluetech.com (Postfix) with ESMTP id F3D278E16A69 for ; Thu, 4 Feb 2010 11:06:48 -0600 (CST) Received: from webmail.supergluetech.com (localhost [127.0.0.1]) by atlantis.supergluetech.com (Postfix) with ESMTP id DD76D8E16A68 for ; Thu, 4 Feb 2010 11:06:48 -0600 (CST) Sender: kvm-owner@vger.kernel.org List-ID: Very sorry for bugin' you all, but I have an issue someone may be able to fix. I have 3 guests on a single host. This host is using bridged networking. The guest VMs can talk to the host and any other computer on the hosts network. They can even get outside to the internet. Likewise, the host - and any other computer on the hosts network can communicate to the guests fine and without problem. However, none of the guests can talk to another guest. I have checked and they are all on the same bridge (each machine using it's own tap interface) and all use the same vnet. Heres an example command I am using: kvm -drive file=disk.qcow2,index=0,media=disk,if=virtio,boot=on -m 512 -net tap,vlan=0,script=no,ifname=tap0,downscript=no -net nic,vlan=0,model=virtio -net tap,vlan=1,script=no,ifname=tap1,downscript=no -net nic,vlan=1,model=virtio -smp 1 -monitor unix:/monitor,server,nowait -vnc 0.0.0.0:2 -name ns1 -pidfile pid -no-shutdown -daemonize I have ensured that iptables is correct: iptables -A INPUT -i tap0 -j ACCEPT iptables -A INPUT -i tap0 -j ACCEPT Note: this is Debian Lenny. Strangely enough, this worked fine under my desktop tests (Ubuntu 9.10) using the same exact config. -- Dean M. Rantala Programmer / Server Administrator Cell: (931) 284-7384 Home: (931) 268-4763