Chapter 19 Certificates

The following table describes the labels in this screen.

Table 112 Trusted Remote Host Details

LABEL

DESCRIPTION

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).

 

 

Certification Path

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

 

own certificate and a list of certification authority certificates in the hierarchy of

 

certification authorities that validate a certificate’s issuing certification authority.

 

For a trusted host, the list consists of the end entity’s own certificate and the

 

default self-signed certificate that the ZyXEL Device uses to sign remote host

 

certificates.

 

 

Refresh

Click Refresh to display the certification path.

 

 

Certificate

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

Information

 

 

 

Type

This field displays general information about the certificate. With trusted

 

remote host certificates, this field always displays CA-signed. The ZyXEL

 

Device is the Certification Authority that signed the certificate. 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 device

 

that created the certificate.

 

 

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 default self-signed

 

certificate on the ZyXEL Device that the ZyXEL Device uses to sign the trusted

 

remote host certificates.

 

 

Signature Algorithm

This field displays the type of algorithm that the ZyXEL Device used to sign the

 

certificate, which is rsa-pkcs1-sha1 (RSA public-private key encryption

 

algorithm and the SHA1 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).

 

 

Subject Alternative

This field displays the certificate’s owner‘s IP address (IP), domain name

Name

(DNS) or e-mail address (EMAIL).

 

 

Key Usage

This field displays for what functions the certificate’s key can be used. For

 

example, “DigitalSignature” means that the key can be used to sign certificates

 

and “KeyEncipherment” means that the key can be used to encrypt text.

 

 

Basic Constraint

This field displays general information about the certificate. For example,

 

Subject Type=CA means that this is a certification authority’s certificate and

 

“Path Length Constraint=1” means that there can only be one certification

 

authority in the certificate’s path.

 

 

 

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P-2602H(W)(L)-DxA User’s Guide