Cisco Cisco Web Security Appliance S170 사용자 가이드

Once the CSR has been generated, submit it to a certificate authority (CA). The CA will return the 
certificate in PEM format.

If you are acquiring a certificate for the first time, search the Internet for “certificate authority services 
SSL server certificates,” and choose the service that best meets the needs of your organization. Follow 
the service’s instructions for obtaining an SSL certificate.

You can also generate and sign your own certificate. Tools for doing this are included with OpenSSL, 
free software from 

http://www.openssl.org

.

In addition to root certificate authority (CA) certificate verification, AsyncOS supports the use of 
intermediate certificate verification. Intermediate certificates are certificates issued by a trusted root CA 
which are then used to create additional certificates. This creates a chained line of trust. For example, a 
certificate may be issued by example.com who, in turn, is granted the rights to issue certificates by a 
trusted root CA. The certificate issued by example.com must be validated against example.com’s private 
key as well as the trusted root CA’s private key.

Cisco periodically releases upgrades (new software versions) and updates (changes to current software 
versions) for AsyncOS for Web and its components. 

occur 

Before you start the upgrade, save the XML configuration file off the Web Security appliance from 
the System Administration > Configuration File page or by using the 

saveconfig

 command. 

Save other files stored on the appliance, such as PAC files or customized end-user notification pages.

When upgrading, do not pause for long amounts of time at the various prompts. If the TCP session 
times out during the download, the upgrade may fail.

After the upgrade completes, save the configuration information to an XML file. 

Save the appliance configuration file (see 

).