Today we’re proud to release an open source utility under the MIT license: SocketCloser.

Fighting hackers and botnets is a difficult job. Even getting ip addresses into the firewall is sometimes not enough. Why? Because existing sockets often don’t get closed — especially if you’re only looking at syn packets.

This utility will terminate all sockets matching a local ip and port with a remote ip and port. Wildcards are allowed.

On Windows, ipv6 closing is supported — something Microsoft’s own tools don’t even support.

Enjoy!