Firewalls

Google Earth IP Addresses

March 22, 2012

I often have to configure a firewall rule to specifically allow Google Earth so if you find yourself in the same situation here are the IP addresses that allow communication. Domains Note you can run an iplookup for these 3 subdomains: kh.google.com geo.keyhole.com auth.keyhole.com but there are still a few IP addresses needed that aren’t [...]

Read the full article →

Firewall Foundations – Packet Filter vs Proxy

May 15, 2008

This is my Part 2 of the Firewall Foundations series. Article 1 on Security Posture can be found here. Firewall Foundations: Packet Filters vs. Proxies What is the difference between a packet filter and a proxy? Preface So you think you know what a proxy is? Well if you are familiar with the old Web [...]

Read the full article →

Web Filter ShootOut Results

May 8, 2008

Untangle.com sponsored a web filter shootout called the “Deep Throat Fight Club“. The test pitted 5 vendors’ technologies to filter pornographic web sites. The test consisted of “5,000 URLs, using key words and phrases like “nudism,” “pornography,” “adult/mature content,” “intimateapparel/swimsuit,” and “not sex education.” Each filter was then graded for the percentage of sites correctly [...]

Read the full article →

Firewall Foundations – 1. Posture

February 12, 2008

This is the first installment of a new series entitled Firewall Foundations. The articles will not present deep theoretical discussions of firewalls nor will it be manufacturer specific, my goal is to discuss broad topics and ideas as they relate to firewall policy design and secure implementation. Firewall Foundation: Article 1Firewall Posture Posture is defined [...]

Read the full article →

Free Enterprise Firewall – Trustix

November 15, 2007

Comodo Software has released an enterprise firewall called Trustix. It apparently has the bells and whistles that admins expect from firewalls and it has a good pedigree coming from Comodo. I will say that I’m ignorant about Comodo’s business class software but I’ve been a satisfied user of their personal firewall software for several years. [...]

Read the full article →

WatchGuard Test-a-Site

February 1, 2007

Watchguard & SurfControl have a site where you can verify whether a website is categorized in their most recent internet filters. After testing a site, you can choose to submit it for review. Good resource for Watchguard Firewall users.

Read the full article →