Ubuntu – kvm, can’t access guest from outside host

guestkvm-virtualizationnat;networkingUbuntu

following ubuntu guide on kvm, I've a test server up and running at this ip address 192.168.0.210 (netmask 255.255.255.0).
The virtual machine (same as host ubuntu 11 server) use dhcp but has a specific ip 192.168.122.99.
The host (already in bridge with guest) can access guest but for other nodes it's impossible!
I've created a new virtual ip on the host 192.168.0.11 and trying to route all requests made to 192.168.122.99 (guest) to this ip, but it fails.
I've followed this guide: https://help.ubuntu.com/community/KVM/Networking (paragraph IP Aliases).

Anyone can help?

Regards,
Giacomo

Best Answer

It sounds like you're using one of the 192.168.122.x addresses libvirt assigns by default, when using the NAT mode. This means the VM is running behind a NAT and not on the bridge you've set up.

Check the configuration, and make sure the VM is plugged into the bridge, and not set up to use NAT

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