On 07/19/2011 12:14 AM, James Hogarth wrote: > > > I built a CentOS 6 machine to host several CentOS 6 guest servers. As all > guests will be Internet facing I set up the host with two bridged NICs and > assigned an Internet facing IP address to br0 and a local IP address to br1. > > > > Each guest was installed using br0 and br1 with virtio drivers. On each I > assigned an Internet facing IP address to eth0 and a local IP address on > eth1. So far so good. I can access the guest servers from either IP address > as expected. That is HTTP, SSH and SMTP servers on them are accessible and > do what they are supposed to do. > > > > Except... Except from any location outside of my Comcast Cable Modem. To > be clear, from any machine inside the modem to any address on the guests, all > works perfectly. But outside the modem the guest apps either don't receive > packets or for some reason don't respond, and I've tired it from four > different locations. > > > > Using Wireshark on the guests I can see the packets arrive from the > outside sources, but no response is seen. On accesses from inside I can see > both incoming and outgoing packets, as expected. > > > > I can ping the outside sources from the guests, yet pings from the outside > sources get no response from the guests. All the outside sources get > responses when pinging the host. I can ping the guests from any inside > machine. > > > > Initial thought is a routing issue particularly with multiple NICs. > > What does 'ip r s' reveal? > That was it! ip r s showed that I had the local facing NIC (eth1) as the gateway, which caused all outgoing packets to be routed to the local network DUH!.
Emmett _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
