PortsLock 2.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Commonly, this program's installer has the following filename: PLManager.exe. We recommend checking the downloaded files with any free antivirus. The following version: 2.0 is the most frequently downloaded one by the program users. The actual developer of the program is SmartLine Inc. The software belongs to Security Tools.
From the developer:
PortsLock is a personal firewall for Windows NT/2000/XP that fully supports user-level security. Once PortsLock is installed, administrators can control which users can access what TCP/IP based protocols (HTTP, FTP, SMTP, POP3, Telnet, etc.) on a local computer, depending on the time of day and day of the week. PortsLock lets you set allowed/denied TCP/UDP ports and IP-addresses for incoming and outgoing connections.
You may want to check out more software, such as Encrypt My Information, CodeKeeper or Steganos AntiVirus 2009, which might be similar to PortsLock.