Chapter 24 System
USG FLEX H Series User’s Guide
390
24.8.2 The Trusted Certificates Import Screen
Click System > Certificate > Trusted Certificates > Import to open the Import Trusted Certificates screen.
Follow the instructions in this screen to save a trusted certificate to the Zyxel Device.
Note: You must remove any spaces from the certificate’s filename before you can import the
certificate.
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 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 email
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.
Extended Key Usage This field displays the method that the Zyxel Device generates and stores a request for server
authentication, client authentication, or IKE Intermediate authentication certificate.
Zyxel
Device
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.
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 the certificate into an email 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 external storage device for example).
Table 194 System > Certificate > Trusted Certificates > Edit (continued)
LABEL DESCRIPTION
To Next Page
Loading...
