Blocking steps for IM: http://tinyurl.com/y98q8fr
How to block Instant Messaging (IM) traffic im chat blocking
IM traffic over HTTP can be blocked today in the following ways:
- Block by defining custom user agents used by the IM applications.
- Block with the “Chat” predefined URL category, or with a custom category containing IM servers.
- Block ports that IM applications use to tunnel through proxies with the HTTP CONNECT method.
- Manually add IM servers into the L4 Traffic Monitor black list to block access to popular IM destinations irrespective of the port.
| MSN Messenger |
Within Access Policies click on objects Specify the following under Block Custom MIME Types:
application/x-msn-messenger
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| Yahoo Instant Messenger |
Create a custom category in Web Security Manager -> Custom URL Categories Specify the following under Sites:
pager.yahoo.com, shttp.msg.yahoo.com, update.messenger.yahoo.com, update.pager.yahoo.com Set this custom category to Block. |
| AOL Instant Messenger |
Create a custom category in Web Security Manager -> Custom URL Categories Specify the following under Sites:
login.oscar.aol.com, login.messaging.aol.com, 64.12.161.153, 64.12.161.185, 64.12.200.89, kdc.gkdc.uas.aol.com, 205.188.0.0/16 Set this custom category to Block. |
| Google Chat |
Create a custom category in Web Security Manager -> Custom URL Categories Specify the following under Advanced: Regular Expressions:
mail\.google\.com/mail/channel Set this custom category to Block. |
| Google Chat (Alternate method) |
Create a custom category in Web Security Manager -> Custom URL Categories Specify the following under Sites:
.chatenabled.mail.google.com, chatenabled.mail.google.com, 216.239.37.125, 72.14.253.125, 72.14.217.189, 209.85.137.125 Set this custom category to Block. |
