Application scenarios of the USG9000 DNS transparent proxy

The DNS transparent proxy function of the firewall can change the destination addresses of certain DNS request packets to the DNS server addresses of other ISPs (such as the DNS server address of ISP2). DNS requests are forwarded to different ISPs, and therefore the web server addresses obtained through resolution belong to different ISPs, and Internet access traffic is forwarded through different ISP links. This helps prevent the issue that a link is congested, whereas other links are idle and ensures that all link resources are fully used.

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