I have a very strange problem and hope someone has seen this before. We have a SBS 2008 server running on citrix xen server. We had shut power down last week because of Hurricane Issac. After turning server back on, we are having random internet outages from the system. For example, I can't resolve google.com nor can I ping any routable ip address on the internet, 184.108.40.206 . I've verified router/firewall, all client computers can route out if i use the isp dns as a secondary. What is really strange is that during random intervals during the day, it works for a few minutes then drops out. In my dns server on the sbs, my forward addresses will not resolve as well. I have spent 2 days trying to resolve this and have had no luck. I've replace firewall and switch as well. Not sure if there is something within sbs that would be causing this. I'm not an sbs expert. I have ran the newtwork config wizard, etc, etc. This is also my exchange server and because of this issue, no mail is getting routed to the server. Any ideas?
Thanks in advance..