Ubuntu on Hyper-V with two network drives

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http://serverfault.com – Im lost and desperate. I have been running with a setup where i have a ubuntu server running in hyper-v. My windows server running hyper-v has two network cards. my internet is coming in to one of them and the other is hooked up with a switch. I then direct both to the ubuntu-server running in hyper-v. Ubuntu uses iptables and serve as a router and a dhcp server. It have all been running fine until now, where i had a issue and had to reinstall windows. Therefore i exported my ubuntu virtual server and imported it again after install. My problem is that somehow theres some setting i might have (HowTos)