Protocol Property

The protocol used for the DNS request.

Syntax


 getProtocol(): DnsProtocols;

 setProtocol(protocol: DnsProtocols): void;

enum DnsProtocols {
  ptUDP,
  ptTCP,
  ptTLS,
  ptHTTPS
}

This property specifies the protocol used for the DNS request when Query is called. Possible values are:


0 (ptUDP - default)	UDP is used. This is the most commonly used DNS protocol.
1 (ptTCP)	TCP is used.
2 (ptTLS)	TCP with TLS is used. Set DNSPort to the port which the server uses for TLS connections. Typically this is port `853`.
3 (ptHTTPS)	HTTP is used. The DNS request is made over HTTP. DNSServer must bet set to a URL of a server accepting DNS over HTTPS (DoH) requests. See the DoHMethod configuration setting for additional options when using this protocol.