Chapter 15 Certificates

Table 87 SECURITY > CERTIFICATES > Trusted Remote Hosts > Details (continued)

LABEL

DESCRIPTION

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 ZyWALL that the ZyWALL uses to sign the trusted remote

 

host certificates.

 

 

Signature Algorithm

This field displays the type of algorithm that the ZyWALL 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 ZyWALL 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.

 

 

MD5 Fingerprint

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

 

MD5 algorithm. The ZyWALL uses one of its own self-signed certificates to

 

sign the imported trusted remote host certificates. This changes the fingerprint

 

value displayed here (so it does not match the original). See Section 15.3 on

 

page 296 for how to verify a remote host’s certificate before you import it into

 

the ZyWALL.

 

 

SHA1 Fingerprint

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

 

SHA1 algorithm. The ZyWALL uses one of its own self-signed certificates to

 

sign the imported trusted remote host certificates. This changes the fingerprint

 

value displayed here (so it does not match the original). See Section 15.3 on

 

page 296 for how to verify a remote host’s certificate before you import it into

 

the ZyWALL.

 

 

Certificate in PEM

This read-only text box displays the certificate or certification request in Privacy

(Base-64) Encoded

Enhanced Mail (PEM) format. PEM uses 64 ASCII characters to convert the

Format

binary certificate into a printable form.

 

You can copy and paste the certificate into an e-mail to send to friends or

 

colleagues or you can copy and paste the certificate into a text editor and save

 

the file on a management computer for later distribution (via floppy disk for

 

example).

 

 

318

 

ZyWALL 2 Plus User’s Guide