virtualbox.org

Moved to viewtopic.php?f=3&t=56178

Thank you.

Well if you can connect to the router machine, it means Virtualbox is working properly.. anything like routing and the sort should be asked on a networking forum, as this is way out of scope of this forum.
Most likely : the NAT interface interfers with your routing table -- you're missing the routes -- firewall is blocking -- routing is not enable in your router VM (not enabled by default)