Cisco Cisco Email Security Appliance C170 사용자 가이드

Select Network > DNS.

Click Edit Settings. 

Select whether to use the Internet’s root DNS servers or your own internal DNS server or the Internet’s 
root DNS servers and specify alternate DNS servers. 

If you want to use your own DNS server(s) enter the server ID and click Add Row. Repeat this for each 
server. When entering your own DNS servers, specify a priority as well. For more information, see 

.

If you want to specify alternate DNS servers for certain domains, enter the domain and the alternate DNS 
server IP address. Click Add Row to add additional domains.

You can enter multiple domains for a single DNS server by using commas to separate domain 
names. You can also enter multiple DNS servers by using commas to separate IP addresses.

Choose an interface for DNS traffic.

Enter the number of seconds to wait before cancelling a reverse DNS lookup.

You can also clear the DNS cache by clicking Clear Cache.

Submit and commit your changes.

Some network environments require the use of traffic routes other than the standard default gateway. You 
can manage static routes via the GUI through the Routing page on the Network tab, or the CLI, via the 

routeconfig

 command.

You can create, edit, or delete static routes via the Routing page on the Network tab. The Email Security 
appliance can use both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) static 
routes, which you can create and manage separately on the Routing page. You can also modify the 
default IPv4 and IPv6 gateways from this page.

Click Add Route for the type of static route you want to create on the Routing page. The Add Static 
Route page is displayed. 

Enter a name for the route.

Enter the destination IP address.