ASP.NET CORE에서 클라이언트 IP 주소를 어떻게 얻습니까?

ASP.NET CORE에서 클라이언트 IP 주소를 어떻게 얻습니까?

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MVC 6을 사용할 때 ASP.NET에서 클라이언트 IP 주소를 얻는 방법을 알려주십시오 Request.ServerVariables["REMOTE_ADDR"].

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API가 업데이트되었습니다. 언제 바뀌 었는지 확실하지 않지만 12 월 말 에 Damien Edwards 에 따르면 다음 과 같이 할 수 있습니다.

var remoteIpAddress = request.HttpContext.Connection.RemoteIpAddress;

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로드 밸런서의 존재를 처리하기 위해 일부 대체 논리를 추가 할 수 있습니다.

또한 검사를 통해 X-Forwarded-For헤더는로드 밸런서가 없어도 설정됩니다 (추가 Kestrel 계층 때문에)?

public string GetRequestIP(bool tryUseXForwardHeader = true)
{
    string ip = null;

    // todo support new "Forwarded" header (2014) https://en.wikipedia.org/wiki/X-Forwarded-For

    // X-Forwarded-For (csv list):  Using the First entry in the list seems to work
    // for 99% of cases however it has been suggested that a better (although tedious)
    // approach might be to read each IP from right to left and use the first public IP.
    // http://stackoverflow.com/a/43554000/538763
    //
    if (tryUseXForwardHeader)
        ip = GetHeaderValueAs<string>("X-Forwarded-For").SplitCsv().FirstOrDefault();

    // RemoteIpAddress is always null in DNX RC1 Update1 (bug).
    if (ip.IsNullOrWhitespace() && _httpContextAccessor.HttpContext?.Connection?.RemoteIpAddress != null)
        ip = _httpContextAccessor.HttpContext.Connection.RemoteIpAddress.ToString();

    if (ip.IsNullOrWhitespace())
        ip = GetHeaderValueAs<string>("REMOTE_ADDR");

    // _httpContextAccessor.HttpContext?.Request?.Host this is the local host.

    if (ip.IsNullOrWhitespace())
        throw new Exception("Unable to determine caller's IP.");

    return ip;
}

public T GetHeaderValueAs<T>(string headerName)
{
    StringValues values;

    if (_httpContextAccessor.HttpContext?.Request?.Headers?.TryGetValue(headerName, out values) ?? false)
    {
        string rawValues = values.ToString();   // writes out as Csv when there are multiple.

        if (!rawValues.IsNullOrWhitespace())
            return (T)Convert.ChangeType(values.ToString(), typeof(T));
    }
    return default(T);
}

public static List<string> SplitCsv(this string csvList, bool nullOrWhitespaceInputReturnsNull = false)
{
    if (string.IsNullOrWhiteSpace(csvList))
        return nullOrWhitespaceInputReturnsNull ? null : new List<string>();

    return csvList
        .TrimEnd(',')
        .Split(',')
        .AsEnumerable<string>()
        .Select(s => s.Trim())
        .ToList();
}

public static bool IsNullOrWhitespace(this string s)
{
    return String.IsNullOrWhiteSpace(s);
}

_httpContextAccessorDI를 통해 제공되었다고 가정합니다 .

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project.json에서 다음에 대한 종속성을 추가하십시오.

"Microsoft.AspNetCore.HttpOverrides": "1.0.0"

에서 Startup.cs의의 Configure()방법 추가 :

  app.UseForwardedHeaders(new ForwardedHeadersOptions
        {
            ForwardedHeaders = ForwardedHeaders.XForwardedFor |
            ForwardedHeaders.XForwardedProto
        });  

그리고 물론 :

using Microsoft.AspNetCore.HttpOverrides;

그런 다음 다음을 사용하여 ip를 얻을 수 있습니다.

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 is maybe because of:

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)

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You can use the IHttpConnectionFeature for getting this information.

var remoteIpAddress = httpContext.GetFeature<IHttpConnectionFeature>()?.RemoteIpAddress;

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var remoteIpAddress = HttpContext.Features.Get<IHttpConnectionFeature>()?.RemoteIpAddress;

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In ASP.NET 2.1, In StartUp.cs Add This Services:

services.AddHttpContextAccessor();
services.TryAddSingleton<IActionContextAccessor, ActionContextAccessor>();

and then do 3 step:

1. Define a variable in your MVC controller

   private IHttpContextAccessor _accessor;
   

2. DI into the controller's constructor

   public SomeController(IHttpContextAccessor accessor)
   {
       _accessor = accessor;
   }
   

3. Retrive the IP Address

   _accessor.HttpContext.Connection.RemoteIpAddress.ToString()
   

This is how it is done.

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First, in .Net Core 1.0 Add using Microsoft.AspNetCore.Http.Features; to the controller Then inside the relevant method:

var ip = HttpContext.Features.Get<IHttpConnectionFeature>()?.RemoteIpAddress?.ToString();

I read several other answers which failed to compile because it was using a lowercase httpContext, leading the VS to add using Microsoft.AspNetCore.Http, instead of the appropriate using, or with HttpContext (compiler is also mislead).

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In my case, I have DotNet Core 2.2 Web App running on DigitalOcean with docker and nginx as reverse proxy. With this code in Startup.cs I can get the client IP

app.UseForwardedHeaders(new ForwardedHeadersOptions
        {
            ForwardedHeaders = ForwardedHeaders.All,
            RequireHeaderSymmetry = false,
            ForwardLimit = null,
            KnownNetworks = { new IPNetwork(IPAddress.Parse("::ffff:172.17.0.1"), 104) }
        });

::ffff:172.17.0.1 was the ip that I was getting before using

Request.HttpContext.Connection.RemoteIpAddress.ToString();

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get ipaddress and hostname in .net core

put this code in controller

Follow these Steps:

var addlist = Dns.GetHostEntry(Dns.GetHostName());
string GetHostName = addlist.HostName.ToString();
string GetIPV6 = addlist.AddressList[0].ToString();
string GetIPV4 = addlist.AddressList[1].ToString();

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This works for me (DotNetCore 2.1)

[HttpGet]
public string Get() 
{
    var remoteIpAddress = HttpContext.Connection.RemoteIpAddress;
    return remoteIpAddress.ToString();
}

참고URL : https://stackoverflow.com/questions/28664686/how-do-i-get-client-ip-address-in-asp-net-core