Need to change port of web UI for my R6400v2 Router

[Famous8]

I am setting up a server and need port 80 to be free to use a certain software. Unfortunately, my R6400v2 Router's web config page is on port 80. (Whenever I load my routers IP address, ex: 52.123.7.875, it loads the web config page)

How do I change the port of the web UI?

[FURRYe38]

What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?

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@Famous8 wrote:

I am setting up a server and need port 80 to be free to use a certain software. Unfortunately, my R6400v2 Router's web config page is on port 80. (Whenever I load my routers IP address, ex: 52.123.7.875, it loads the web config page)

How do I change the port of the web UI?

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