# YMSG Service

The Yahoo! Messenger (YMSG) is the instant messaging service provided by Yahoo!. The security device compares actual YMSG traffic with maximum settings of what you consider to be normal YMSG traffic. The security device considers any traffic exceeding such settings as anomalous.

To modify one or more of the following settings for YMSG, enter a new value in the Current column for the parameter you want to adjust, and then click Apply:

Maximum Message Length: Specifies the maximum length in bytes of a YMSG instant message. Minimum: 200; maximum: 8192; default: 8192.

Maximum Username Length: Specifies the maximum length in bytes of a YMSG username. Minimum: 1; maximum: 1024; default: 84.

Maximum Group Name Length: Specifies the maximum length in bytes for a name of a group of buddies. Minimum: 1; maximum: 1024; default: 84.

Maximum Encrypted Password Length: Specifies the maximum number of bytes in the encrypted password sent during the YMSG authorization process. Minimum: 1; maximum: 8000; default: 1024.

Maximum Instant Message Length: Specifies the maximum length in bytes of a YMSG instant message. Minimum: 20; maximum: 8000; default: 8000.

Maximum Activity String Length: Specifies the maximum number of bytes in the length of a data type activity value. Data type activities can be such activities as PEERTOPEER, FILEXFER, and TYPING. Minimum: 1; maximum: 20; default: 15.

Maximum Challenge Length: Specifies the maximum length in bytes of the challenge string that a YMSG server sends during the authentication process. Minimum: 1; maximum: 1024; default: 84.

Maximum Cookie Length: Specifies the maximum number of bytes in the cookie that a YMSG server sends to a client. Minimum: 1; maximum: 1000; default: 400.

Maximum URL Length: Specifies the maximum length in bytes of a uniform resource locator (URL). Minimum: 1; maximum: 8000; default: 1024.

Maximum Conference Message Length: Specifies the maximum number of bytes in a YMSG conference join message. Minimum: 1; maximum: 8000; default: 1024.

Maximum Conference Name Length: Specifies the maximum length in bytes of a YMSG conference session name. Minimum: 1; maximum: 8000; default: 1024.

Maximum E-mail Address Length: Specifies the maximum length in bytes of the address in an e-mail message that a YMSG server sends as part of a new e-mail alert. Minimum: 1; maximum: 1024; default: 84.

Maximum E-mail Subject Length: Specifies the length in bytes of the subject line in an e-mail message that a YMSG server sends as part of a new e-mail alert. Minimum: 1; maximum: 1024; default: 128.

Maximum Filename Length: Specifies the maximum length in bytes of the name of a file that YMSG peers can transfer to each other. Minimum: 1; maximum: 8000; default: 1000.

Maximum Chatroom Name Length: Specifies the maximum length in bytes of a YMSG chatroom name. Minimum: 1; maximum: 8000; default: 1024.

Maximum Chatroom Message Length: Specifies the maximum length in bytes of a message sent in a chatroom. Minimum: 1; maximum: 8000; default: 2000.

Maximum Buddy List Length: Specifies the maximum length in bytes of the buddy list that a YMSG server sends. Minimum: 20; maximum: 8000; default: 8000.

Maximum Webcam Key Length: Specifies the maximum number of bytes in the webcam key that YMSG uses to support webcam transmissions. Minimum: 1; maximum: 1024; default: 124.