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On which Interface should Proxy DNS be set?

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Article ID: KB9877 KB Last Updated: 12 Aug 2010Version: 3.0
Summary:
On what Interface should Proxy DNS be set?
Symptoms:
Juniper firewall is not using DNS servers configured on Proxy DNS configuration.
Solution:

Ensure the Proxy DNS option is selected on the ScreenOS Interface configuration web page (Network > Interfaces) for all interfaces that are receiving DNS queries and need to be forwarded to the appropriate DNS servers as configured on the DNS Proxy Configuration web page (Network > DNS > Proxy )

Example:
Client (192.168.1.5)-------192.168.1.1 (Trust) Netscreen (Untrust) 1.1.1.1 -----------Internet

In the sample network, the Firewall should have following command:

set interface trust proxy dns

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