Re: [libvirt-users] Can't get cable connection working on virtual router machine

Hi, I'm not sure what sort of diagram you mean, but I'll have a try. Does this help? It sounds like I need to do something to enable routing on what I've labelled "NIC3" on the diagram - can you please explain what I need to do? [image: Inline image 1] Regards, Phill On Tue, Sep 1, 2015 at 4:53 PM, Ajey Gore <ajeygore(a)gmail.com&gt; wrote: > Can you please drop a rough diagram here? I think you are routing through > this VM and must have shared the host interface. > > - ajey > > > > On Tue, Sep 1, 2015 at 7:39 AM, Phill Edwards <philledwards(a)gmail.com&gt; > wrote: > >> I'm pretty new to KVM and have a KVM CentOS 7.1 hypervisor running a few >> VMs. I'm moving all my VMs from an ESXi host as I want to use KVM in >> future. Most of my VMs are working except for one which is running a Sophos >> UTM router (Sophos UTM is similar to products like pfSense >> <https://www.pfsense.org/>;, Smoothwall <http://www.smoothwall.org/> etc). >> >> The host has 3 physical NICs which are configured on the Sophos VM as: >> 1) LAN (fixed IP) >> 2) DMZ (fixed IP) >> 3) WAN (which is directly plugged into a cable modem for the internet >> connection and is configured DHCP). >> >> I have imported the settings from the "old" Sophos machine so I know the >> configuration of the new one is identical to the old one. I have even tried >> configuring the NICs to have the same MAC addresses as the old one. >> >> The problem is that no matter what I try I cannot get the WAN NIC to get >> an internet link up and running with my cable modem. I have re-installed >> the VM countless times, turned off the modem and VM, done a factory reset >> of the modem, and, as I mentioned, ensured the MAC addresses are the same. >> Nothing I try has been successful. >> >> The network interfaces on the new Sophos VM look like this: >> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast >> state UP group default qlen 1000 >> link/ether 00:0c:29:79:d4:de brd ff:ff:ff:ff:ff:ff >> inet 192.168.0.254/24 brd 192.168.0.255 scope global eth0 >> valid_lft forever preferred_lft forever >> 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1472 qdisc pfifo_fast >> state UP group default qlen 1000 >> link/ether 00:0c:29:79:d4:e8 brd ff:ff:ff:ff:ff:ff >> 4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast >> state UP group default qlen 1000 >> link/ether 00:0c:29:79:d4:f2 brd ff:ff:ff:ff:ff:ff >> inet 192.168.1.254/24 brd 192.168.1.255 scope global eth2 >> valid_lft forever preferred_lft forever >> >> I also found this in the /var/log/system.log of the Sophos VM: >> 2015:08:29-12:04:05 sop dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 >> port 67 interval 6 >> 2015:08:29-12:04:11 sop dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 >> port 67 interval 13 >> 2015:08:29-12:04:24 sop dhclient: DHCPDISCOVER on eth1 to 255.255.255.255 >> port 67 interval 2 >> 2015:08:29-12:04:26 sop dhclient: No DHCPOFFERS received. >> >> I have shut down firewalld on the KVM host so I don't think there are any >> firewall rules blocking this. >> >> As soon as I fire up the original Sophos VM on ESXi the internet >> connection works perfectly again. >> >> If I can't get this VM running on KVM it's a show-stopper. Can anyone >> suggest what might be going on that is preventing the WAN link from >> connecting? Or suggest a way of troubleshooting this? >> >> Thanks in advance. >> > >