Keep your ports open - for yourself.
Port knocking: a stealthy system for network authentication across closed ports
Port Knocking has not been seen on TV

Port Knocking

Perl prototype: v0.30

  • pcaplib support added; daemon no longer requires firewall log file

2004-Nov-14 18:59 | ...more

new Net::Pcap support added to sniff packets directly ...more

Learn about firewalls and discover port knocking. Find out how to use port knocking to secure your servers with a Perl prototype or other implementations. Play with knocks in the knock lab. Contribute to the port knocking project. See what others are saying. Is port knocking a form of security through obscurity? Port knocking is definitely not any kind of ultimate solution and some think that it should be avoided altogther. The author doesn't think so and also has some other opinions.

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Port Knocking (c) 2002,2003 Martin Krzywinski Port Knocking (c) 2002,2003 Martin Krzywinski

Port Knocking (c) 2002,2003 Martin Krzywinski

Port Knocking (c) 2002,2003 Martin Krzywinski

Port Knocking (c) 2002,2003 Martin Krzywinski

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jokes

My own joke, below, was so bad that a number of people contributed their own versions. All of these carry the seal-of-arcaneness. Although you'll be a geek by telling people these jokes, only you will know ;)

Knock knock.
   Who's there?
Port 552.
Port 733.
Port 682.
Port 837.
Port 709.
Hello? Hello?

Contributed jokes

Knock knock...
   Who's there?
port 26676
port 30768
port 29274
   w3lc0me 1n!

Thanks to Alvin for this one. hint: those are not random numbers.


Knock knock...
   Who's there?
Usher.
   Usher who?
Usher wish I could SSH to your server!

Sorry... ;) (Slashdot)


Axl Rose:
Hey, hey hey hey
Knock Knock Knockin' on Heaven's Port....

(Slashdot)

Since posting this joke, I've received a following comment.

As a life long Dylan fan, I feel compelled to point out, in case you don't already know, the true origins of this tune which was first released by Dylan in 1973, when Axl was a mere 11 years old.

I didn't know this myself, but realized the importance of the correction to any Dylan fans. All underwear bunches are now free.


Hey, don't knock it until you try it! ... or vice versa.

(Slashdot)

last updated 2004-Apr-05 21:00
Port Knocking (c) 2002-2017 Martin Krzywinski