virtualbox.org

I have set the adapter of dhcp server and the guests to internal network and the guests can ping one another from different subnets ; but can't connect to the internet. Please help!

Internal means just that. Only works for internal. Add a second adapter set to NAT or use Bridged.

@perryg, am very grateful to your advice. It worked! as soon as i added another network adapter and set it to NAT, i was able to get to the internet while my vms can still ping one another.Great!

Then for my SIP phone call using trixbox, will i set the trixbox's second adapter to NAT? OR is it just the vm?
mekehud.

If it is just an application that runs in the operating system it should use the same network as the OS.