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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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