Application scenarios where the USG6000 serves as the DNS Client

The firewall serves as the DNS Client and uses DNS to dynamically obtain the IP address corresponding to the domain name for user communications.
When the firewall executes the following services, it can serve as the DNS Client to send DNS request packets to the DNS Server.
Perform the ping or tracert operation in domain name mode.
Access the security center platform in domain name mode to update the signature database.
Access the CA server in domain name mode to obtain the certificate online.

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