Question
What limits are there in Plesk for username/password?
Answer
Usernames and passwords in Plesk are case-sensitive.
Username and password length have the following limits:
- Plesk user name length: from 1 to 255 symbols;
- Plesk user password length: from 5 to 255 symbols;
- System user name length: from 1 to 32 symbols for Linux, 1 to 20 symbols for Windows;
- System user password length: from 5 to 255 symbols;
- Mail address: up to 64 symbols (not counting '@' and domain part)
Character limitations are separate for different groups of users:
For Customers/Resellers:
- The first character is limited to alphanumeric characters.
- " " (Space) is prohibited.
- System user names on the OS (Linux "root" and Windows "Administrator") are also prohibited.
For additional users (added in Users > User accounts menu):
- The first character is limited to alphanumeric characters.
- Characters from all languages are allowed.
- Special sentences other than (& @.'+ -) are prohibited.
- System user names on the OS (Linux "root" and Windows "Administrator") are also prohibited.
Character limitations for system users are based on the target OS:
- For Linux, only lowercase English letters, numbers,
-(dash), and.(dot) are allowed. The first character is limited to letters. - For Windows, only English letters, numbers,
-(dash),.(dot),_(underscore) are allowed. The first character is limited to alphanumeric symbols.
Character restrictions for passwords:
-
The string is limited to the first 126 ASCII characters.
-
" " (Space),
" "(quotation marks),"" ""(double quotation marks) are prohibited. -
The password cannot include the user name.
Example: User: qwerty Password: 1@qwerty2$
The system user password restrictions are the same as the target OS, although they differ depending on the distribution.
These limits are hard-coded, which means they cannot be changed in Plesk configuration. Additionally, system limits have a higher priority than limits configured in Plesk.
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