Visualstudio / IIS / ASP.NET create a web proxy for web service calls

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C#

ASP.NET

IIS

Visual-Studio

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I'm consuming a web service which is bound to a specific IP adress.
e.g. https://service.ExternalCompany.com/GetInformation allows only request from (185.10.20.30)

I'm creating a windows application which should be used on multiply computers and networks. So the webservice rejects the request because of wrong source IP addresses.

My approach would be to change the endpoint uri to my own webservice.
Do I have to implement a httpListener (Webserver example class found in the web) or is there a way to configure IIS?

I would listen on https://service.myWebserver.com take the request, send it to https://service.ExternalCompany.com and return the result.

What I have tried:

MyWindowsApplication (dynamic IP) <=> service.MyWebserver.com[path] (fix IP) <=> service.ExternalCompany.com[path]