Users and network administrators have reported issues when trying to filter or block access to Facebook with SOHO firewall hardware, such as the TRENDnet TW100-BRF214 Firewall Router. Entering the address "facebook.com" seems to fail at blocking facebook.com consistently.
Under the typical SOHO firewall, going to "URL Filter" and entering "facebook.com" and "www.facebook.com" will only result in partial blocking of the site. In fact, users enter www.facebook.com in the URL of the web browser and are still able to access the site.
It is necessary to block all associated IP addresses and domain combinations related to facebook. Maintaining a comprehensive up to date list may not be practical. Here we hope to include as much as possible as current as time permits.
facebook known address
URL List
facebook.com www.facebook.com login.facebook.com blog.facebook.com apps.facebook.com facebook.com en-gb.facebook.com
IPv4 List
204.15.20.0 - 204.15.23.255 69.63.176.0 - 69.63.191.255 69.171.224.0 - 69.171.255.255 66.220.144.0 - 66.220.159.255
research
Doing a simple "host facebook.com" produces the following:
facebook.com has address 66.220.149.88 facebook.com has address 66.220.152.16 facebook.com has address 69.171.234.21 facebook.com has address 69.171.237.16 facebook.com has address 69.171.247.21
whole doing a "host www.facebook.com" results in:
www.facebook.com has address 69.171.237.32