ZyXEL Communications P-2602HWLNI User Manual

 Chapter 19 Certificates

P-2602HWLNI User’s Guide

Click Security > 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 
ZyXEL Device to accept as trusted. The ZyXEL Device 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. 

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 ZyXEL Device calculated using 

the MD5 algorithm. 

SHA1 Fingerprint

This is the certificate’s message digest that the ZyXEL Device 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.

Apply

Click Apply to save your changes back to the ZyXEL Device. 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 119   My Certificate Details (continued)