Cisco Cisco Email Security Appliance C390 사용자 가이드

system also requires general access over that port in order to send email messages. 
After a connection is made to 

upgrades.ironport.com

, IronPort Customer 

Support can to use the SSH tunnel to obtain access to the appliance. As long as 
the connection over port 25 is allowed, this will bypass most firewall restrictions. 
You can also use the 

techsupport tunnel

 command in the CLI.

In both the “Remote Access” and “Tunnel” modes, a password is required. It is 
important to understand that this is not the password that will be used to access 
the system. After the password and the system serial number are provided to your 
Customer Support representative, a password used to access the appliance is 
generated.

After the techsupport tunnel is enabled, it will remain connected to 

upgrades.ironport.com

 for 7 days. At the end of the 7 days, established 

connections will not be disconnected but will be unable to re-attach to the tunnel 
once disconnected. The time-out set on the SSH tunnel connection does not apply 
to the Remote Access account; it will remain active until specifically deactivated.

You can use the Help > Support Request page or the 

supportrequest

 command 

(see the Cisco IronPort AsyncOS CLI Reference Guide for more information about 
the 

supportrequest

 command) to email the configuration of your appliance to the 

IronPort Customer Support team and/or additional users, and enter comments 
describing the issue for which you need support. This command requires that the 
appliance is able to send mail to the Internet.