SocketBlock ActiveX Firewall SDK for Windows 2000 Cost: $695 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions SocketBlock ActiveX Firewall SDK for Windows 2000: Use SocketBlock to add firewall capabilities to applications that will operate on the internet to ensure that your application is safe from various attacks, and that once identified, an intruder can be blocked from accessing the system without incurring high CPU usage.