Cisco Cisco Web Security Appliance S670 トラブルシューティングガイド

How to block Google Talk or Google Chat within
Gmail?

Document ID: 118126

Contributed by Josh Wolfer and Siddharth Rajpathak, Cisco TAC
Engineers.
Jul 31, 2014

Contents

Question:

How to block Google Chat within Gmail?

Environment: All WSA devices

A custom category can be used to block the Google chat from within gmail.

This will cause chat enabled gmail sessions to display the following error when attempting to use sign in to
chat feature:

We're experiencing technical difficulties that may prevent your chats from being sent.

•

Blocking Google Chat

1. Create a custom category in Web Security Manager −> Custom URL
Categories

2. Specify the following under Advanced: Regular Expressions
mail\.google\.com/mail/channel

3. Specify the following under Sites
talk.google.com, .talk.google.com

4. In an Access policy, set this custom category to Block.

Blocking Google Chat (Alternate method)

1. Create a custom category in Web Security Manager −> Custom URL Categories

2. 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

3. In an Access policy, set this custom category to Block.

Blocking Google Chat (Alternate method 2)

1. Match against this content type header:

User−Agent: Google Talk