Technical Tip: How to restrict only IPV4 DNS requests from FortiProxy

When the admin user selects the 'Prefer DNS Result' to 'ipv4-strict' under the Explicit Proxy setting, that will not be saved in the GUI because the 'ipv6-status' is disabled.

To restrict only IPv4 DNS requests from FortiProxy, 'ipv6-status' should be enabled before enabling the 'ipv4-strict'.

From CLI:

config web-proxy explicit
    edit web-proxy
        set ipv6-status enable
        set pref-dns-result ipv4-strict
    end

From GUI: