Been trying to figure this one out and have done nothing but scratch my head. Here is what I have:
Server #1 (10.0.0.1) and Server #2 (10.0.0.2) behind a UTM320. I boot up the firewall and ping/rdp/trace to Server #1 and #2 with no issues. After a random period of time, I am unable to reach Server#2, yet I can still reach Server #1.
I've created a hole in the firewall for each with no change. I even setup an ANY>ANY>ANY rule with no luck - only Server #1 is still accessible
However, when I reboot the UTM320, I am once again able to reach both Server #1 and Server #2 until a random amount of time has passed and then Server #2 become inaccessible again.
I have tried 'conntrack -F' with no luck. I've stripped the UTM back down to a basic setup again with no luck. I've flushed ARP on Server #2 with no luck. So at this point, I have no idea why the UTM is acting this way
Any suggestions?
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