[Novalug] Meeting topic suggestion - openvpn
tux at belanger.fr
Wed Sep 28 20:02:39 EDT 2011
> There is an existing technique called SPA (Single Packet Authentication)
> that allows you to send an encrypted packet to a host that basically says
> "allow access from the host I just connected from"). Take a look at 'fwknop'
> for an open source implementation.
An other method is "Port knocking" when you trie to connect to some
specifics ports in a specific order:
[ https://secure.wikimedia.org/wikipedia/en/wiki/Port_knocking ]
[ http://www.marksanborn.net/linux/add-port-knocking-to-ssh-for-extra-security/ ]
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