Saturday, May 16, 2009

Single Packet Authorization and Port Knocking

I like the fwknop tool , a new version has been released recently.
The tool can be used in 2 modes, SPA or Port-Knocking. SPA is a variant of Port-knocking that uses only one single knock.

- Authorization part is done by using libpcap, so there is no service and no ports to listen to.
- Access to protected service is only granted after receiving a single non-replayed encrypted packet from fwknop client.

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