DeployLX Network Licensing defaults to port 80 since most corporate and personal firewalls do not block that port increasing the probability that the user will be able to find and connect to the network license monitor without configuring anything. Other applications use the same reasoning and may already be listening on port 80. When the Network License Monitor starts you may receive the following error.
If you aren't running Skype you can determine which application is using port 80 by running the following from the command prompt:
netstat -a -b -n -p TCP
NOTE: If you're running Windows Vista and later or Windows Server 2008 and later you will need to run netstat from an elevated command prompt
The output will be something like the following
Active Connections Proto Local Address Foreign Address State TCP 0.0.0.0:80 0.0.0.0:0 LISTENING [Skype.exe] TCP 0.0.0.0:135 0.0.0.0:0 LISTENING RpcSs [svchost.exe] TCP 0.0.0.0:443 0.0.0.0:0 LISTENING [Skype.exe]
The name of the executable appears in brackets following the line with the port number.