I have tried to block below listed URL from SEP firewall rule. but it is unsuccessful. http://apo.o.facebook.com/ www.o.facebook.com/ Please suggest
Do your clients browse thru a proxy server?
Have you tried blocking *.facebook.com?
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If you are using proxy
How to block all websites and allow only certain websites using Network Threat Protection Firewall rule.
Note: That Firewall Rule will not work if the proxy settings are configured in the browser.
Here are few Articles for the same:
Allow and Block websites using Symantec Endpoint Protection Firewall
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try the article
Symantec Endpoint Protection Manager - Firewall - Policies explained
Best Practises for Firewall Policy
Check the forum
How to block/allow website access using the Symantec Endpoint Protection Manager custom Intrusion Prevention Signature policy
Video: Allow and Block websites using Symantec Endpoint Protection Firewall
Blocking a Website using Symantec Endpoint Protection
try this policy