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Chapter 41 Certificates
ZyWALL USG 100/200 Series User’s Guide
648
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 or generated by the ZyWALL.
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 as the Subject Name field.
“none” displays for a certification request.
Signature Algorithm This field displays the type of algorithm that was used to sign the certificate. The
ZyWALL uses rsa-pkcs1-sha1 (RSA public-private key encryption algorithm and
the SHA1 hash algorithm). Some 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. “none”
displays for a certification request.
Valid To This field displays the date that the certificate expires. The text displays in red
and includes an Expired! message if the certificate has expired. “none” displays
for a certification request.
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 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. This field does not display for a certification
request.
MD5 Fingerprint This is the certificate’s message digest that the ZyWALL calculated using the
MD5 algorithm.
SHA1 Fingerprint This is the certificate’s message digest that the ZyWALL calculated using the
SHA1 algorithm.
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 lowercase letters, uppercase letters
and numerals to convert a binary certificate into a printable form.
You can copy and paste a certification request into a certification authority’s web
page, an e-mail that you send to the certification authority or a text editor and
save the file on a management computer for later manual enrollment.
You can copy and paste a certificate into an e-mail to send to friends or
colleagues or you can copy and paste a certificate into a text editor and save the
file on a management computer for later distribution (via floppy disk for
example).
Table 221 Object > Certificate > My Certificates > Edit
LABEL DESCRIPTION