1.8 KiB
Reserved and Invalid Usernames
Basic restrictions
OpenPanel
OpenPanel applies the following rules when you create or modify a OpenPanel username:
Usernames may only use lowercase letters (a–z) and digits (0–9).
- Usernames cannot contain less than 3 characters.
- Usernames cannot contain more than 16 characters.
OpenAdmin
OpenAdmin applies the following rules when you create or modify an admin username:
Usernames may only use lowercase letters (a–z) and digits (0–9).
- Usernames cannot contain less than 5 characters.
- Usernames cannot contain more than 20 characters.
Passwords may only use lowercase letters (a–z) and digits (0–9).
- Usernames cannot contain less than 5 characters.
- Usernames cannot contain more than 20 characters.
SSH
OpenAdmin applies the following rules when you modify an SSH password:
Passwords may only use lowercase letters (a–z) and digits (0–9).
- Passwords cannot contain less than 8 characters.
- Passwords cannot contain more than 20 characters.
Reserved usernames
OpenPanel reserves some usernames for the system’s use, and you cannot use them for OpenPanel accounts. This list of reserved usernames can grow over time, and new versions of OpenPanel may add to this list.
OpenPanel checks the following file to determine whether to reserve or restrict a username:
/etc/openpanel/openadmin/config/forbidden_usernames.txt
Currently reserved usernames:
- test
- restart
- reboot
- shutdown
- exec
- root
- admin
- ftp
- lsws
- litespeed
- 1000
- vsftpd
- httpd
- apache2
- apache
- docker
- podman
- nginx
- php
- mysql
- mysqld
- www-data
- openpanel
- openadmin
To reserver a certail username, simply add it to the forbidden_usernames.txt file.