ZyWALL/USG Series User’s Guide
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CHAPTER 35
Application Patrol
35.1 Overview
Application patrol provides a convenient way to manage the use of various applications on the
network. It manages general protocols (for example, HTTP and FTP) and instant messenger (IM),
peer-to-peer (P2P), Voice over IP (VoIP), and streaming (RSTP) applications. You can even control
the use of a particular application’s individual features (like text messaging, voice, video
conferencing, and file transfers). You can also configure bandwidth management with application
patrol in the Configuration > BWM screen for traffic prioritization to enhance the performance of
delay-sensitive applications like voice and video.
35.1.1 What You Can Do in this Chapter
•Use the Profile summary screen (see Section 35.2 on page 619) to view license registration and
signature information.
•Use the Profile Add/Edit screens (see Section 35.2 on page 619) to set actions for application
categories and for specific applications within the category.
35.1.2 What You Need to Know
If you want to use a service, make sure both the Security Policy and application patrol allow the
service’s packets to go through the ZyWALL/USG.
Note: The ZyWALL/USG checks secure policies before it checks application patrol rules for
traffic going through the ZyWALL/USG.
Application patrol examines every TCP and UDP connection passing through the ZyWALL/USG and
identifies what application is using the connection. Then, you can specify whether or not the
ZyWALL/USG continues to route the connection. Traffic not recognized by the application patrol
signatures is ignored.
Application Profiles & Policies
An application patrol profile is a group of categories of application patrol signatures. For each
profile, you can specify the default action the ZyWALL/USG takes once a packet matches a
signature (forward, drop, or reject a service’s connections and/or create a log alert).
Use policies to link profiles to traffic flows based on criteria such as source zone, destination zone,
source address, destination address, schedule, user.
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