vMA and apparent firewall issue

I deployed a new copy of the vMA 5.5.0.1.  Immediately after deployment, I was able to ping the vMA and ssh into it.  After running for about 24 hours, I am no longer able to ping or ssh into the appliance.  If I connect to the console, I am able to ping the default gateway and other esxi hosts.  What am I missing here?

thanks