Friday, November 25, 2011

What is a World Wide Name (WWN)?

A World Wide Name, or WWN, is a 64-bit address used in fiber channel networks to uniquely identify each element in a Fiber Channel network.

Soft Zoning utilizes World Wide Names to assign security permissions.

The use of World Wide Names for security purposes is inherently insecure, because the World Wide Name of a device is a user-configurable parameter.

For example, to change the World Wide Name (WWN) of an Emulex HBA, the users simply needs to run the `elxcfg` command.

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