ZyXEL p-2802h-i1 ユーザーズマニュアル

 Chapter 15 Certificates

P-2802H(W)(L)-I Series User’s Guide

The following table describes the labels in this screen. 

Table 90   Trusted CA Details

Certificate Name

This field displays the identifying name of this certificate. If you want to change 

the name, type up to 31 characters to identify this key certificate. You may use 

any character (not including spaces).

Property 

Issues certificate 

revocation lists 

(CRLs)

Select this check box to have the ZyXEL Device check incoming certificates that 

are issued by this certification authority against a Certificate Revocation List 

(CRL).
Clear this check box to have the ZyXEL Device not check incoming certificates 

that are issued by this certification authority against a Certificate Revocation List 

(CRL).

Certification Path

Click the Refresh button to have this read-only text box display the end entity’s 

certificate and a list of certification authority certificates that shows the hierarchy 

of certification authorities that validate the end entity’s certificate. If the issuing 

certification authority is one that you have imported as a trusted certification 

authority, it may be the only certification authority in the list (along with the end 

entity’s own certificate). The ZyXEL Device does not trust the end entity’s 

certificate and displays “Not trusted” in this field if any certificate on the path has 

expired or been revoked.

Refresh

Click Refresh to display the certification path.

Certificate 

Information

These read-only fields display detailed information about the certificate. 

Type

This field displays general information about the certificate. CA-signed means 

that a Certification Authority signed the certificate. Self-signed means that the 

certificate’s owner signed the certificate (not a certification authority).  X.509 

means that this certificate was created and signed according to the ITU-T X.509 

recommendation that defines the formats for public-key certificates.

Version

This field displays the X.509 version number. 

Serial Number

This field displays the certificate’s identification number given by the certification 

authority.

Subject

This field displays information that identifies the owner of the certificate, such as 

Common Name (CN), Organizational Unit (OU), Organization (O) and Country 

(C).

Issuer

This field displays identifying information about the certificate’s issuing 

certification authority, such as Common Name, Organizational Unit, 

Organization and Country. 
With self-signed certificates, this is the same information as in the Subject 

Name field.

Signature Algorithm

This field displays the type of algorithm that was used to sign the certificate. 

Some certification authorities use rsa-pkcs1-sha1 (RSA public-private key 

encryption algorithm and the SHA1 hash algorithm). Other certification 

authorities may use rsa-pkcs1-md5 (RSA public-private key encryption 

algorithm and the MD5 hash algorithm).

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.

Key Algorithm

This field displays the type of algorithm that was used to generate the 

certificate’s key pair (the ZyXEL Device uses RSA encryption) and the length of 

the key set in bits (1024 bits for example).