How to Block iMessage on iOS Devices

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Overview

The Palo Alto Networks firewall can block access to Apple's iMessage on iOS devices. Since there is no specific application in the applipedia database, this is accomplished by blocking the relevant URLs in the URL filtering profile and calling the profile in a security policy.

 

Steps

1. Go to Objects > Security Profiles > URL filtering and click Add.

2. Give the profile a suitable name and add the below URLs in the block list with the action selected as "block" and click OK.

     service.ess.apple.com

     service1.ess.apple.com

     service2.ess.apple.com

url filtering profile.png

3. Call this newly created URL filtering profile in the relevant security policy, click OK and commit the changes.

security policy.png

 

owner: rchougale

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Comments

I tired this URL filter and I am still able to send iMessages. Are there any applications or services that need to be added?

I just blocked "query.ess.apple.com/" URL which is use by the iMessages application for authentication. After blocking this URL, iMessages application is not able to send or receive any messages.