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Author Topic: website block - facebook  (Read 10752 times)

aroraditya

  • Level 1 Member
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  • Posts: 10
website block - facebook
« on: May 18, 2012, 05:56:44 AM »

Hello everyone,

i need a small help. I am having a DFL-800 Firewall through which we are blocking facebook and other sites in our office domain network. it block facebook if user open it http://www.facebook.com.

but if any user open it with HTTPS://www.facebook.com firewall didnt block them ???.

please advise how can i block https sites through DFL 800.

thank you very much for advise.

Regards
Aditya
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chechito

  • Level 3 Member
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  • Posts: 193
Re: website block - facebook
« Reply #1 on: May 18, 2012, 06:35:32 PM »

you can use opendns filtering or filter https protocol allowing only known https sites

you cannot filter https traffic because of encryption obscure url text
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lingnau

  • Level 2 Member
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  • Posts: 53
    • www.lingnau.com.br
Re: website block - facebook
« Reply #2 on: December 21, 2012, 02:59:15 AM »

The only way to do that with a DFL firewall is to block the HTTPS traffic to the domain ranges used by facebook:

Create a few objects for the IP adresses

FACEBOOK_A 69.171.224.0/19
FACEBOOK_B 66.220.144.0/20

and so on.

After that, create a group that contains all those objects
IP_GP_Facebook FACEBOOK_A, FACEBOOK_B

Create a block rule before all the other rules and that should prevent the access to facebook.

Here's a suggested list of IP adresses:
http://stackoverflow.com/questions/11164672/list-of-ip-space-used-by-facebook
« Last Edit: December 21, 2012, 03:01:42 AM by lingnau »
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