ASP.NET Core: How to get remote IP address? - asp.net

Question

I try to get remote (client) IP addres:
var ip = httpContext.Features.Get<IHttpConnectionFeature>()?.RemoteIpAddress
But it works only for local requests (it will return ::1 value)
When I load page from remote machine the value is null. I investigated there is no IHttpConnectionFeature in the Features collection in this case.
Why? And how to get remote ip address correctly?

Answer 1

I know that this post is old but I came here looking for the same question and finnaly I did this:
On project.json add dependency:
"Microsoft.AspNetCore.HttpOverrides": "1.0.0"
On Startup.cs, in the Configure method add:
app.UseForwardedHeaders(new ForwardedHeadersOptions
{
ForwardedHeaders = ForwardedHeaders.XForwardedFor |
ForwardedHeaders.XForwardedProto
});
And, of course:
using Microsoft.AspNetCore.HttpOverrides;
Then, I got the ip like this:
Request.HttpContext.Connection.RemoteIpAddress
In my case, when debugging in VS I got always IpV6 localhost, but when deployed on an IIS I got always the remote IP.
Some useful links:
How do I get client IP address in ASP.NET CORE? and RemoteIpAddress is always null
The ::1 may be because:
Connections termination at IIS, which then forwards to Kestrel, the v.next web server, so connections to the web server are indeed from localhost.
(https://stackoverflow.com/a/35442401/5326387)

Answer 2

Just try this:
var ipAddress = HttpContext.Connection.RemoteIpAddress;
And if you have another computer in same LAN, try to connect with this pc but use user ip instead of localhost. Otherwise you will get always ::1 result.