A backdoor that allows you to keep remote access to a shell on a LAN protected by masquerading, getting rid of the inability for non public address to listen to a port reachable from the Internet.
You can download it from the following link: https://packetstormsecurity.com/files/download/23734/ddb.tar.gz
Source: https://packetstormsecurity.com/files/23734/ddb.tar.gz.html