Name: doorman Version: 0.81 ITP number: 305584 Section: admin License: GPL-2 Doorman allows a server which is not intended for general public access to run with most (or even all) of it's TCP ports closed to the outside world. It admits only recognized parties, that properly introduce themselves by "knocking" to a specific closed port on the server. The door-knocker, "knock", can be run under Unix, GNU/Linux, or Microsoft Windows. This particular implementation deviates a bit from his original proposal (described by Martin Krzywinski in Sysadmin magazine and linuxjournal.com), in that the doorman watches for only a single UDP packet. To get the doorman to open up, the packet must contain an MD5 hash which correctly hashes a shared secret, salted with a 32-bit random number, the identifying user or group-name, and the requested service port-number. Currently doorman can only protect TCP services. The project's home page is at: http://doorman.sourceforge.net/ You can get the source and i386 binary packages from: http://poczta.prezu.one.pl/doorman/ -- Regards, Patryk Cisek
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