While searching for firewall and security info on DMVPN, I landed on firewall.cx that explains in the simplest way possible that has enabled me to grasp the concept in depth. This is a really great site that I will bookmark as I dive into the world of security. Thanks guys!

I really like the way you explain VPN related articles. They are easy, brief and straight to the point!

I have never seen such a great article on the Catalyst 4507R-E, it gives all the physical information which is needed for assembling Cisco high-end switches! Thank you for beautiful photos and useful information! You guys are doing a great job supporting Engineers like me..Thank you again :)

I'm writing a paper on how to setup a VLAN and without your write-ups I would be completely lost. I've scoured the internet for days but you presented the information clearly and with great figures. Thank you so much!!

I'm one of the people for whom those Linux tutorials were specifically written. I was trying to learn a new thing from "Chapter Three" sources that always assumed I knew the basics up to their point. Firewall.cx's introduction to Linux finally put solid ground under my feet and clear sky above my head. I've been able to work and learn in every direction from here. THANK YOU.

Chris you and your team tempt me to write yet more words of gratitude and thankfulness. New site and contents are outstanding and I am waiting to see new notes on Windows, Linux and Network Security Domains..as you people doing great at Networking and Cisco Knowledge base.

Hello, wonderful website, very resourceful and thank you very much for putting so much effort in it.

My hat's off to Jil for taking the illiteracy out of this illiterate field. How can all these people submit a CLI line and have it understood? And thanks to Theano for a truly beautiful AND functional site!

Thank you for your explanation of the Cisco 4507R and the supervisory cards. I am a network project manager and sometimes need help understanding the technical.

Just came to your site via Google. Simply awesome. Another reason why the net is indispensable. I know I will be spending a lot of time here....Thanks a million!