Fwknop - Single Packet Authorization & Port Knocking

fwknop implements an authorization scheme known as Single Packet Authorization SPA for strong service concealment. SPA requires only a single packet which is encrypted, non-replayable, and authenticated via an HMAC in order to communicate desired access to a service that is hidden behind a firewa...

Single Packet Authorization: fwknop

fwknop implements an authorization scheme known as Single Packet Authorization SPA for strong service concealment. SPA requires only a single packet which is encrypted, non-replayable, and authenticated via an HMAC in order to communicate desired access to a service that is hidden behind a firewa...

[fwknop] Single Packet Authorization and Port Knocking

fwknop stands for the "FireWall KNock OPerator", and implements an authorization scheme called Single Packet Authorization SPA. This method of authorization is based around a default-drop packet filter fwknop supports iptables on Linux, ipfw on FreeBSD and Mac OS X, and PF on OpenBSD and libpcap...