httprequest.UserHostName in .net core

Question

Couldn't find the UserHostName property on HttpRequest. And nothing about it in any forums. Has this been dropped? Any idea?

Answer 1

The accepted answer is not correct. someHttpContext.Request.Host corresponds to the Host header used in the HTTP request. For example: fetching http://example.org/test will result in example.org.

UserHostName used to return the DNS hostname of the client IP address making the request (which is someHttpContext.Connection.RemoteIpAddress). It looks as though the only recourse is to manually resolve the DNS hostname from the IP address with e.g. Dns.GetHostEntry.