Cisco Cisco Email Security Appliance C160 Mode D'Emploi

You can control from which IP addresses users access the Email Security 
appliance. Users can access the appliance from any machine with an IP address 
from the access list you define. When creating the network access list, you can 
specify IP addresses, subnets, or CIDR addresses.

AsyncOS displays a warning if you do not include the IP address of your current 
machine in the network access list. If your current machine’s IP address is not in 
the list, it will not be able to access the appliance after you commit your changes.

You can create the network access list either via the Network Access page in the 
GUI or the 

adminaccessconfig > ipaccess

 CLI command. 

 shows 

the Network Access page with a list of IP addresses that are allowed to connect to 
the Email Security appliance.

To create a user access list via the GUI:

Use the System Administration > Network Access page. 

Click Edit Settings. 

Select Only Allow Specific Connections.

Enter the IP addresses that will be allowed to connect to the appliance.

You can enter an IP address, IP address range or CIDR range. Use commas to 
separate multiple entries.

Submit and commit your changes.