ASP.NET jMedia control panel include block ipaddress management tool that can help site administrator to block any ipaddress to be used for accessing secure places.

You can block any ipaddress through which malicious users violates website terms of use by posting spam contents, using malicious ways to compromise website security.

Once blocked, user using that ip-address can't login to access website secure places.

Site administrator can access block ipaddress management from Control Panel -> Settings -> Block IP section.