SubNetwork Explorer is a network scanning tool that checks subnets of a network for anonymous FTP, CUPS, Netbios, and SunRPC ports. It uses ‘fork()’ to scan all of the subnets at the same time.
You can download it from the following link: https://packetstormsecurity.com/files/download/24023/netxplorer-0.0.3BETA.tar.gz
Source: https://packetstormsecurity.com/files/24023/netxplorer-0.0.3BETA.tar.gz.html