ZyXEL Communications ZyWALL 2 Series User Manual

Page of 614
ZyWALL 2 Series User’s Guide 
15-16  
Certificates 
Table 15-5 Trusted CAs 
LABEL DESCRIPTION 
Issuer 
This field displays identifying information about the certificate’s issuing certification 
authority, such as a common name, organizational unit or department, organization 
or company and country. With self-signed certificates, this is the same information as 
in the Subject field. 
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. 
CRL Issuer 
This field displays “Yes” if the certification authority issues Certificate Revocation 
Lists for the certificates that it has issued and you have selected the Issues 
certificate revocation lists (CRL)
 check box in the certificate’s details screen to 
have the ZyWALL check the CRL before trusting any certificates issued by the 
certification authority. Otherwise the field displays “No”. 
Import 
Click Import to open a screen where you can save the certificate of a certification 
authority that you trust, from your computer to the ZyWALL. 
Details 
Select the radio button next to a certificate’s index number and then click Details to 
open a screen with an in-depth list of information about that certificate.  
Refresh 
Click this button to display the current validity status of the certificates. 
Delete 
Select the radio button next to the index number of a certificate that you want to 
delete and then click Delete to remove that certificate. 
15.10 Importing a Trusted CA’s Certificate 
Click CERTIFICATESTrusted 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 to the ZyWALL, see the following figure.