ZyXEL Communications NSA-220 Plus User Manual page 87

Next, let's modify the certificate by changing the Common Name to this NSA's
2
host name of "nsa220plus", the Organization to "Test" and the Key Length to
2048.
Maintenance > SSL > Edit a Self-Signed Certificate
The NSA restarts its network services and returns you to the login screen.
3
Maintenance > SSL > Edit a Self-Signed Certificate
NSA-220 Plus User's Guide
Chapter 3 Tutorials
87