AsteriskNow - Connection Refused

I just installed AsteriskNow and don’t know much about Linux. After AN has been up and running for a couple of days I can not get into the system via the IP address, give me Connection Refused. I reboot AN and no problem. Is there a parameter that controls access that is for some reason locking me out based on my IP address, etc. I get IPs on each PC on my network dynamically and am wondering if that is the problem.