ZyXEL Communications 200 Series - Manual (Page 654)

Chapter 41 Certificates
ZyWALL USG 100/200 Series User’s Guide
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41.3.2 The Trusted Certificates Import Screen
Click Object > Certificate > Trusted Certificates > Import to open the Trusted
Certificates Import screen. Follow the instructions in this screen to save a trusted certificate
to the ZyWALL.
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You must remove any spaces from the certificate’s filename before you can
import the certificate.
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.
SHA1 Fingerprint This is the certificate’s message digest that the ZyWALL calculated using the
SHA1 algorithm. You can use this value to verify with the certification authority
(over the phone for example) that this is actually their 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 lowercase letters, uppercase letters
and numerals to convert a 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).
Export Certificate Click this button 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.
OK Click OK to save your changes back to the ZyWALL. You can only change the
name.
Cancel Click Cancel to quit and return to the Trusted Certificates screen.
Table 224 Object > Certificate > Trusted Certificates > Edit (continued)
LABEL DESCRIPTION