Cisco Cisco Email Security Appliance C390 기술 참조

You can configure the appliance to use the Internet root servers for all DNS queries except specific local 
domains.

mail3.example.com> dnsconfig

Currently using the Internet root DNS servers.

No alternate authoritative servers configured.

Choose the operation you want to perform:

- NEW - Add a new server.

- SETUP - Configure general settings.

[]> new

Please enter the domain this server is authoritative for. (Ex: "com").
[]> example.com

Please enter the fully qualified hostname of the DNS server for the domain "example.com".

(Ex: "dns.example.com").

[]> dns.example.com

Please enter the IP address of dns.example.com.

[]> 10.1.10.9

Currently using the Internet root DNS servers.

Alternate authoritative DNS servers:
1. com: dns.example.com (10.1.10.9)

Choose the operation you want to perform:
- NEW - Add a new server.

- EDIT - Edit a server.

- DELETE - Remove a server.
- SETUP - Configure general settings.

[]> 

You can configure the appliance to use your own DNS cache server.

mail3.example.com> dnsconfig

Currently using the Internet root DNS servers.

Alternate authoritative DNS servers:

1. com: dns.example.com (10.1.10.9)

Choose the operation you want to perform:

- NEW - Add a new server.

- EDIT - Edit a server.

- DELETE - Remove a server.

- SETUP - Configure general settings.

[]> setup

Do you want the Gateway to use the Internet's root DNS servers or would you like

it to use your own DNS servers?

1. Use Internet root DNS servers

2. Use own DNS cache servers

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