Support Support Downloads Knowledge Base Juniper Support Portal Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

Blocking IM Chats on Firewall devices



Article ID: KB7827 KB Last Updated: 23 Aug 2011Version: 7.0
How to block AIM, Yahoo, MSN Messenger, MS Windows Live Messenger, Skype, and other chat applications.
AIM, Yahoo, Windows Live Messenger, MSN Messenger, Skype and other chat application vendors use their own application port numbers, but will also try going out port 80, if their own application port is not open.  This makes it tough to block IM, since port 80 is the same port number as HTTP.
Chat vendors use P2P technology, which is similar to Bit Torrent, Kazaa, and Napster. In order to block Chat applications via Deep Inspection, you will need to use a Juniper  IDP device to block those signatures. Deep Inspection on the firewall device does not support blocking of Chat signatures.
Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search