ZyXEL g-2000 plusv2 ユーザーガイド

ZyXEL G-2000 Plus v2 User’s Guide

202

Chapter 16 Certificates

Type

This field displays what kind of certificate this is. 
REQ represents a certification request and is not yet a valid certificate. Send a 

certification request to a certification authority, which then issues a certificate. Use 

the My Certificate Import screen to import the certificate and replace the request.
 SELF represents a self-signed certificate. 
*SELF represents the default self-signed certificate, which the ZyXEL device uses 

to sign imported trusted remote host certificates. 
CERT represents a certificate issued by a certification authority.

Subject

This field displays identifying information about the certificate’s owner, such as CN 

(Common Name), OU (Organizational Unit or department), O (Organization or 

company) and C (Country). It is recommended that each certificate have unique 

subject information. 

Issuer

This field displays identifying information about the certificate’s issuing certification 

authority, such as a common name, organizational unit or department, 

organization or company and country. With self-signed certificates, this is the same 

information as in the Subject field.

Valid From

This field displays the date that the certificate becomes applicable. The text 

displays in red and includes a Not Yet Valid! message if the certificate has not yet 

become applicable.

Valid To

This field displays the date that the certificate expires. The text displays in red and 

includes an Expiring! or Expired! message if the certificate is about to expire or has 

already expired.

Details 

Click the details icon to open a screen with an in-depth list of information about the 

certificate.
Click the delete icon to remove the certificate. A window displays asking you to 

confirm that you want to delete the certificate.
You cannot delete a certificate that one or more features is configured to use.
Do the following to delete a certificate that shows *SELF in the Type field. 
1. Make sure that no other features, such as HTTPS, VPN, SSH  are configured to 

use the *SELF certificate.
2.  Click the details icon next to another self-signed certificate (see the description 

on the Create button if you need to create a self-signed certificate).
3.  Select the Default self-signed certificate which signs the imported remote 

host certificates check box. 
4.  Click Apply to save the changes and return to the My Certificates screen.
5.  The certificate that originally showed *SELF displays SELF and you can delete 

it now.
Note that subsequent certificates move up by one when you take this action

Create

Click Create to go to the screen where you can have the ZyXEL device generate a 

certificate or a certification request.

Import

Click Import to open a screen where you can save the certificate that you have 

enrolled from a certification authority from your computer to the ZyXEL device.

Delete

Click Delete to delete an existing certificate. A window display asking you to 

confirm that you want to delete the certificate. Note that subsequent certificates 

move up by one when you take this action.

Refresh

Click Refresh to display the current validity status of the certificates.

Table 67   My Certificates (continued)