# User & Password

When a server’s `authorization` parameter is enabled, other servers that actively connect to it must authenticate themselves by name and password, or by X.509 certificate.

In the above image, servers A and B both configure active routes to one another.

- Because A enables authorization, A must configure a user named B.
- However, because B disables authorization, A need not identify itself to B, and B need not configure a user named A.

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