19216811.liveChapter 41 Certificates
ZyWALL USG 50 User’s Guide
651
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 ZyWALL 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 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.
Table 201
Configuration > Object > Certificate > Trusted Certificates > Edit
LABEL
DESCRIPTION