ZyXEL Communications G-2000 Plus User Manual

ZyAIR G-2000 Plus User’s Guide

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Chapter 17 Certificates

Click CERTIFICATES, Trusted CAs to open the Trusted CAs screen. This screen displays 
a summary list of certificates of the certification authorities that you have set the ZyAIR to 
accept as trusted. The ZyAIR accepts any valid certificate signed by a certification authority 
on this list as being trustworthy; thus you do not need to import any certificate that is signed by 
one of these certification authorities. See the following figure. 

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.

MD5 Fingerprint

This is the certificate’s message digest that the ZyAIR calculated using the MD5 

algorithm. 

SHA1 Fingerprint

This is the certificate’s message digest that the ZyAIR 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 64 ASCII characters to convert the 

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).

Export

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.

Note: When you are saving your certificate, use "cer" or "cert" as 
the file name extension.

Apply

Click Apply to save your changes back to the ZyAIR. You can only change the 

name, except in the case of a self-signed certificate, which you can also set to 

be the default self-signed certificate that signs the imported trusted remote host 

certificates.

Cancel

Click Cancel to quit and return to the My Certificates screen.

Table 69   My Certificate Details (continued)