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Understanding Instant Messaging Predefined Policy Applications

When you create a policy, you can specify predefined instant messaging applications for the policy.

Before You Begin
For background information, read Security Policy Applications.

Table 85 lists predefined Internet-messaging applications. Each entry includes the name of the application, the default or assigned port, and a description of the application.

Table 85: Predefined Internet-messaging Applications

Application	Port	Description
Gnutella	6346 (default)	Gnutella is a public domain file sharing protocol that operates over a distributed network. You can assign any port, but the default is 6346.
MSN	1863	Microsoft Network Messenger is a utility that allows you to send instant messages and talk online.
NNTP	119	Network News Transport Protocol is a protocol used to post, distribute, and retrieve USENET messages.
SMB	445	Server Message Block (SMB) over IP is a protocol that allows you to read and write files to a server on a network.
YMSG	5010	Yahoo! Messenger is a utility that allows you to check when others are online, send instant messages, and talk online.

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