ScanSSH scans the given addresses and networks for running services. It mainly detects open proxies and Internet services. For known services, ScanSSH will query their version number and displays the results in a list.
This program was originally written under OpenBSD as a personal measurement tool. However, besides gathering statistics, it's also useful for other purposes such as ensuring that all machines on your network run the latest SSH versions, etc...
It is BSD-licensed, please see the source files.
The program requires
libpcap - http://www.tcpdump.org/
libevent - http://www.monkey.org/~provos/libevent/
libdnet - http://libdnet.sourceforge.net/
Built and tested on NetBSD, OpenBSD and Linux, but it should also run with other UNIX-like operating systems.
To build,
./configure
make
make install
should make you happy.
Thanks to Marius Eriksen for release testing.
Thanks to the original author Niels Provos provos@citi.umich.edu http://www.citi.umich.edu/u/provos
Since Niels doesn't have any time to take care about this piece of software and I'm one of the Fedora packagers for it, I took it over and do maintain it now on https://github.com/ofalk/scanssh.