19216811.liveChapter 12 Certificates
P-660HN-FxZ Series User’s Guide
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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
Name
This field displays the certificate’s owner‘s IP address (IP), domain 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 ZyXEL Device calculated using
the MD5 algorithm. You cannot use this value to verify that this is the remote
host’s correct certificate because the ZyXEL Device has signed the certificate;
thus causing this value to be different from that of the remote host’s correct
certificate. See
Section 12.6.3 on page 207
for how to verify a remote host’s
certificate.
SHA1 Fingerprint
This is the certificate’s message digest that the ZyXEL Device calculated using
the SHA1 algorithm. You cannot use this value to verify that this is the remote
host’s correct certificate because the ZyXEL Device has signed the certificate;
thus causing this value to be different from that of the remote host’s correct
certificate. See
Section 12.6.3 on page 207
for how to verify a remote host’s
certificate.
Certificate in PEM
(Base-64) Encoded
Format
This read-only text box displays the certificate or certification request in Privacy
Enhanced Mail (PEM) format. PEM uses 64 ASCII characters to convert the
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).
Back
Click this to return to the previous screen without saving.
Export
Click this and then
Save
in the
File Download
screen. The
Save As
screen
opens, browse to the location that you want to use and click
Save
.
Table 75
Trusted Remote Host Details (continued)
LABEL
DESCRIPTION