SystemSearcher is a Linux security scanner written in Perl. It scans single hosts or subnets for anonymous FTP servers, TFTP servers, SMTP servers which allow relaying, SSH servers, Telnet servers, NFS servers with exported directories, mail servers, Web servers (HTTP/HTTPS), well- known trojan ports, and exploitable CGIs. You can also scan a list of specific servers and specific ports. It uses non-blocking socket communication with a 3-second socket timeout. It can also scan for proxy servers which are open to the world (on port 80,8080,1080, or 3128), and SMB servers or Windows boxes sharing directories.