Username and Password Requirements

The following table lists the valid characters that can be used in usernames and passwords for PAN-OS and Panorama accounts.

Account Type	Username and Password Restrictions
Password Character Set	There are no restrictions on any password field character sets.
Remote Admin, SSL-VPN, or Captive Portal	The following characters are not allowed for the username: Backtick (`) Angular brackets (< and >) Ampersand (&) Asterisk (*) At sign (@) Question mark (?) Pipe (\|) Single-Quote (‘) Semicolon (;) Double-Quote (") Dollar ($) Parentheses ( '(' and ')' ) Colon (':')
Local Administrator Accounts	The following are the allowed characters for local usernames: Lowercase (a-z) Uppercase (A-Z) Numeric (0-9) Underscore (_) Period (.) Hyphen (-) Login names cannot start with a hyphen (-).

Document:PAN-OS® Web Interface Reference