ZyXEL Communications P-2608HWL-Dx Series User Manual

P-2608HWL-Dx Series User’s Guide

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Chapter 19 Certificates

Click Security > Certificates > Directory Servers to open the Directory Servers screen. 
This screen displays a summary list of directory servers (that contain lists of valid and revoked 
certificates) that have been saved into the ZyXEL Device. If you decide to have the ZyXEL 
Device check incoming certificates against the issuing certification authority’s list of revoked 
certificates, the ZyXEL Device first checks the server(s) listed in the CRL Distribution 
Points field of the incoming certificate. If the certificate does not list a server or the listed 
server is not available, the ZyXEL Device checks the servers listed here.

MD5 Fingerprint

This is the certificate’s message digest that the ZyXEL Device calculated using 

the MD5 algorithm. You cannot use this value to verify that this is the remote 

host’s actual certificate because the ZyXEL Device has signed the certificate; 

thus causing this value to be different from that of the remote hosts actual 

certificate. See 

 for how to verify a remote host’s 

certificate.

 

SHA1 Fingerprint

This is the certificate’s message digest that the ZyXEL Device calculated using 

the SHA1 algorithm. You cannot use this value to verify that this is the remote 

host’s actual certificate because the ZyXEL Device has signed the certificate; 

thus causing this value to be different from that of the remote hosts actual 

certificate. See 

 for how to verify a remote host’s 

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 64 ASCII characters to convert the 

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

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 of the certificate.

Cancel

Click Cancel to quit configuring this screen and return to the Trusted Remote 

Hosts screen.

Table 100   Trusted Remote Host Details (continued)