Information
Sets DNS server(s) to be used by the appliance to perform DNS queries
Rationale:
The security appliance may perform DNS queries in order to achieve URL filtering or threat protection against Botnet traffic.
Solution
* Step 1: Run the following to enable the DNS lookup
HOSTNAME(CONFIG)# DNS DOMAIN-LOOKUP _<interface_name>_ <interface_name> is the name of the interface connected to the DNS server</div>
* Step 2: Configure the group of DNS servers
HOSTNAME(CONFIG)# DNS SERVER-GROUP DEFAULTDNS
* Step 3: Acquire the enterprise authorized DNS servers' IP addresses <dns_ip_address> and for each of them, run the following command to configure the DNS server in the DNS server group
HOSTNAME(CONFIG-DNS-SERVER-GROUP)#NAME-SERVER _<dns_ip_address>_