> Administrator Information > Advanced Security Settings > Solving Problems for Advanced Security > Problems on Using a Digital Certificate > Cannot Update a Self-Signed Certificate

Cannot Update a Self-Signed Certificate

The Common Name has not been entered.

Common Name must be entered.

Unsupported characters have been entered to Common Name.

Enter between 1 and 128 characters of either IPv4, IPv6, host name, or FQDN format in ASCII (0x20-0x7E).

A comma or space is included in the common name.

If a comma is entered, the Common Name is divided at that point. If only a space is entered before or after a comma, an error occurs.

ET-5880/L6580 Series