Using the old port-based approach, you'd have to add a new SRV record with your DNS provider (and it could take up to 86400 seconds for clients to notice the change) and then also remember to edit your firewall (e.g. /etc/iptables.rules) to permit external traffic over that new port.
nslookup | Microsoft Docs nslookup set port: Changes the default TCP/UDP DNS name server port to the value specified. nslookup set querytype: Changes the resource record type for the query. nslookup set recurse: Tells the DNS name server to query other servers if it doesn't have the information. nslookup set retry: Sets the number of retries. nslookup set root Service overview and network port requirements for Windows May 27, 2020 Overview of common TCP and UDP Default Ports
List of Common Network Port Numbers – Utilize Windows
mac osx - How can I specify nameserver's port number in Can I specify non-default port number for nameserver in osx? Update: osx don't use /etc/resolve.conf, but use files under /etc/resolver/. I have wrote a file dev with content '127.0.0.1' to route all dns queries for *.dev domains to a local dns server (127.0.0.). But I cannot specify dns server's port … Why was 80 Chosen as the Default HTTP Port and 443 as the
Why was 80 Chosen as the Default HTTP Port and 443 as the
networking - How to redirect DNS to different ports Class: standard DNS class field (this is always IN). Priority: the priority of the target host, lower value means more preferred. Weight: A relative weight for records with the same priority. Port: the TCP or UDP port on which the service is to be found. Target: the canonical hostname of the machine providing the service, ending in a dot. Example: Important Port numbers for the Linux system administrator May 19, 2011 Wyse Management Suite (WMS) DNS Discovery | VDI Toolbox Dec 21, 2017 Port numbers, URLs, and IP addresses | Deep Security