ZyXEL Communications NBG410W3G Series User Manual

Chapter 11 Certificates

NBG410W3G Series User’s Guide

Click SECURITY > CERTIFICATES > Trusted CAs to open the Trusted CAs screen and 
then click Import to open the Trusted CA Import screen. Follow the instructions in this 
screen to save a trusted certification authority’s certificate from a computer to the ZyXEL 
Device. The ZyXEL Device trusts any valid certificate signed by any of the imported trusted 
CA certificates.

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You must remove any spaces from the certificate’s filename before you can 
import the certificate.

CRL Distribution 

Points

This field displays how many directory servers with Lists of revoked certificates 

the issuing certification authority of this certificate makes available. This field 

also displays the domain names or IP addresses of the servers.

MD5 Fingerprint

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

Apply

Click Apply to save your changes back to the ZyXEL Device. You can only 

change the name and/or set whether or not you want the ZyXEL Device to 

check the CRL that the certification authority issues before trusting a certificate 

issued by the certification authority.

Cancel

Click Cancel to quit and return to the Trusted CAs screen.

Table 58   SECURITY > CERTIFICATES > Trusted CAs > Details (continued)