Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

You can use the 

ping

 command to ensure that the appliance can contact the local 

server. You can also use the 

telnet

 command to telnet to port 80 of the local 

server to ensure the local server is listening on that port.

AsyncOS includes the ability to revert the AsyncOS operating system to a 
previous qualified build for emergency uses. 

After upgrading to AsyncOS 7.0, you cannot revert to a version of AsyncOS 
earlier than 6.5.

Because upgrades cause one-way transformation of key subsystems, the reversion 
process is complex and requires qualification by Cisco IronPort Quality 
Assurance teams. IronPort certifies specific versions of CASE, Sophos, Outbreak 
Filters, and McAfee to AsyncOS versions. Not all prior versions of the AsyncOS 
operating system are available for reversion. The earliest AsyncOS version 
supported for this functionality is AsyncOS 5.5.0; prior versions of AsyncOS are 
not supported.

Using the 

revert

 command on a Cisco IronPort appliance is a very destructive 

action. This command destroys all configuration logs and databases. Only the 
network information for the management interface is preserved--all other network 
configuration is deleted. In addition, reversion disrupts mail handling until the 
appliance is reconfigured. Because this command destroys network configuration, 
you may need physical local access to the Cisco IronPort appliance when you 
want to issue the 

revert

 command.