Michael Rash, Security Researcher

USENIX ;login: Article on fwknop

USENIX fwknop Article I have written an article for USENIX ;login: Magazine entitled "Combining Port Knocking and Passive OS Fingerprinting with fwknop. Fwknop is the first port knocking implementation to combine port knocking and passive OS fingerprinting into a single piece of software. This allows you to do things like only allow Linux systems to connect to your SSH daemon.