Chapter 41 Certificates

 

Table 201 Configuration > Object > Certificate > Trusted Certificates > Edit

 

LABEL

DESCRIPTION

 

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

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

 

Algorithm

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 ZyWALL uses RSA encryption) and the

 

 

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

 

 

 

 

Subject

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

 

Alternative 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.

 

 

 

 

MD5 Fingerprint

This is the certificate’s message digest that the ZyWALL calculated

 

 

using the MD5 algorithm. You can use this value to verify with the

 

 

certification authority (over the phone for example) that this is

 

 

actually their certificate.

 

 

 

 

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ZyWALL USG 50 User’s Guide