minor README update

This commit is contained in:
Michael Rash 2014-01-01 13:42:13 -05:00
parent 227d0ab947
commit 3adb359932

7
README
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@ -9,9 +9,10 @@ communicate desired access to a service that is hidden behind a firewall in a
default-drop filtering stance. The main application of SPA is to use a firewall
to drop all attempts to connect to services such as SSH in order to make the
exploitation of vulnerabilities (both 0-day and unpatched code) more difficult.
Any service that is concealed by SPA naturally cannot be scanned for with Nmap.
The fwknop project supports three different firewalls: iptables on Linux
systems, pf on OpenBSD, and ipfw on FreeBSD and Mac OS X.
Because there are no open ports, any service that is concealed by SPA naturally
cannot be scanned for with Nmap. The fwknop project supports three different
firewalls: iptables on Linux systems, pf on OpenBSD, and ipfw on FreeBSD and
Mac OS X.
SPA is essentially next generation Port Knocking (PK), but solves many of the
limitations exhibited by PK while retaining its core benefits. PK limitations