Some nice way to confirm that settings are applied.
@kar I check my settings with a website called https://ipleak.net . Maybe you can refer users to that website or a website like it.
Good input thanks :)
Also: https://dnsleaktest.com is a nice site for this.
Also don't forget https://www.grc.com/dns/dns.htm
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Also: https://dnsleaktest.com is a nice site for this.