Cisco Cisco Email Security Appliance C190 Technical References

Cisco AsyncOS 9.1 for Email CLI Reference Guide

Chapter 3 The Commands: Reference Examples

DNS

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.

[]>

Adding an Alternate DNS Server for Specific Domains

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.

[]>

Using Your Own DNS Cache Servers

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: