www.ipv4ipv6.net

ipv6 site

2024-03-28T10:06:18Z

Dedicated Web Server on a defined IPv4 Address (192.168.1.2)

Public IP Address API

https://www.ipify.org/

https://www.ipv4ipv6.net/api/IpAddress/

https://test-ipv6.com/

https://findipv6.com/

https://whatismyipaddress.com/

IPNetwork command line and C# library

https://github.com/lduchosal/ipnetwork

Microsoft’s IPv6 Portal	http://www.microsoft.com/ipv6/
UK IPv6 Resource Centre	http://www.cs-ipv6.lancs.ac.uk/ipv6/
6Bone.Net	http://www.6bone.net/
IPv6 News and Links	http://www.hs247.com/
WIDE Project	http://www.v6.wide.ad.jp/
IPv6 Information	http://www.ipv6.org/

IPv6 address types

2024-04-28T23:20:57Z

IPv6 addresses have three types:

Global Unicast Address –Scope Internet- routed on Internet

Unique Local — Scope Internal Network or VPN internally routable, but Not routed on Internet

Link Local – Scope network link- Not Routed internally or externally.

Global and Public Addresses

Global addresses are routable on the internet and start with 2001:

Internal Addresses- Link Local and Unique Local

These addresses are not routed on the Internet and are reserved for internal networks.

IPv6 has two Internal address types.

Link Local
Unique Local

Link Local

These are meant to be used inside an internal network, and again they are not routed on the Internet.

Link local addresses start with fe80

They are restricted to a link and are not routed on the Internal network or the Internet.

Link Local addresses are self assigned i.e. they do not require a DHCP server.

A link local address is required on every IP6 interface even if no routing is present.

Unique Local

Unique Local are meant to be used inside an internal network.

They are routed on the Internal network but not routed on the Internet.

The address space is divided into two /8 spaces: fc00::/8 for globally assigned addressing, and fd00::/8 for locally assigned addressing.

For manually assignment by an organisation use the fd00 prefix.

nslookup www.ipv4ipv6.net

F:\net8.0\publish>nslookup www.ipv4ipv6.net
服务器:  UnKnown
Address:  fd18:f22c:7814:d900:1af2:2cff:fe78:14d9

非权威应答:
名称:    www.ipv4ipv6.net
Addresses:  2606:4700:3036::ac43:b4af
          2606:4700:3032::6815:23ec
          104.21.35.236
          172.67.180.175

ping -6 www.ipv4ipv6.net

F:\net8.0\publish>ping -6  www.ipv4ipv6.net

正在 Ping www.ipv4ipv6.net [2606:4700:3032::6815:23ec] 具有 32 字节的数据:
来自 2606:4700:3032::6815:23ec 的回复: 时间=219ms
来自 2606:4700:3032::6815:23ec 的回复: 时间=218ms
来自 2606:4700:3032::6815:23ec 的回复: 时间=218ms
来自 2606:4700:3032::6815:23ec 的回复: 时间=220ms

Google dns server 2001:4860:4860::8888 and 2001:4860:4860::8844.

matter ipv6 address

How to Enable or Disable IPv6 in Windows 10

2024-02-16T11:28:55Z

Considerations Before Enabling IPv6:

ISP Support

DNS Server Support

Router Support

ISP Support

Not all ISPs offer IPv6 connectivity.

Router Support

Ensure that your router supports IPv6.

Option One: To Enable or Disable IPv6 or its Components using Microsoft Easy Fix Wizard
Option Two: To Enable or Disable IPv6 in Network Adapter Properties
Option Three: To Enable IPv6 for Specific Network Adapter in PowerShell
Option Four: To Enable IPv6 for All Network Adapters in PowerShell
Option Five: To Disable IPv6 for Specific Network Adapter in PowerShell
Option Six: To Disable IPv6 for All Network Adapters in PowerShell

如果你确定有 IPv6，但我们检测不到，有两个可能的原因：

1.你的单位通过网络策略阻断了与外界的 IPv6 通信

2.你看到的 IPv6 地址不是公网地址。任何以“::”“fc”“fd”或“fe”开头的地址都无法接入 IPv6 互联网。

3.当内容商同时提供 IPv4 和 IPv6 时，你的浏览器会优先通过 IPv4 连接。

How to Get IP Address in Blazor WebAssembly

2024-02-16T11:03:09Z

You can use a third party API, such as https://www.ipv4ipv6.net/api/IpAddress/, to get the IP address of the current request in Blazor. The script https://www.ipv4ipv6.net/api/IpAddress/ will return the IP address in text format. But this is a workaround. As of now, there is no way to achieve this. In the following code snippet, the IP address will be retrieved from the https://www.ipv4ipv6.net/api/IpAddress/ API through a JS interop call to the Blazor server.

[_Host.cshtml/index.html]

<script>
function GetAddress() {
    var script = document.createElement("script");
    script.type = "text/javascript";
    script.src = "https://www.ipv4ipv6.net/api/IpAddress/";
    document.getElementsByTagName("head")[0].appendChild(script);
};
function DisplayIP(response) {
    document.getElementById("text").innerHTML = "Your IP Address is " + response.ip;
}
</script>

[index.razor]

@page "/"
@inject IJSRuntime jsRuntime

<button @onclick="GetIp">Get IP!!!</button>
<textarea id="text" style="width:50%;height:40px;" />

@code{
          public async Task GetIp()
          {
                 await jsRuntime.InvokeAsync<object>("GetAddress");
          } 
}

Ohter

github.com

https://github.com/vandycknick/cloudflare-ddns

Cloudflare DDNS allows you to run your own Dynamic DNS service from the comfort of your own infrastructure. Combined with a Raspberry PI or whatever spare hardware you still have lying around, it helps promote a more decentralized internet at a low cost. During execution, it resolves your current public IPv4 and IPv6 addresses and creates/updates DNS records in Cloudflare to point to your home address. It keeps track of any DNS records that it is managing, giving you some peace of mind and allowing it to run in non-empty Cloudflare zones without having to worry that your public blog gets taken down. Any stale or duplicate records will get safely cleaned up.

How to Get Real Visitor IP Address (Restoring Visitor IPs) with Nginx and CloudFlare.

2024-02-09T03:09:20Z

One annoying issue, however, is the fact that because it’s a proxy you see incoming requests as coming from CloudFlare servers rather than the original client. So if you’re doing any cool data analytics on your server your source IP information will be borked.

To provide the client (visitor) IP address for every request to the origin, Cloudflare adds the "CF-Connecting-IP" header. We will catch the header and get the real ip address of the visitor.

There’s an easy way to fix it, however.modify your nginx configuration to let you get the real ip address of your visitors for your web applications that behind of Cloudflare's reverse proxy network.

I run Nginx as my main webserver,which allows you to specify a set of proxy server IPs and the original IP header within the forwarded traffic so you can map it properly.

So, using Nginx, edit your nginx.conf file and add the following to your http section:

http 80;
include cloudflare.conf
real_ip_header X-Forwarded-For;

$ curl https://www.cloudflare.com/ips-v4
173.245.48.0/20
103.21.244.0/22
....
131.0.72.0/22

cloudflare.conf

So, using Nginx, edit your nginx.conf file and add the following to your http section:

set_real_ip_from 173.245.48.0/20;

set_real_ip_from 103.21.244.0/22;

set_real_ip_from 103.22.200.0/22;

set_real_ip_from 103.31.4.0/22;

...

set_real_ip_from 2405:b500::/32;

set_real_ip_from 2405:8100::/32;

set_real_ip_from 2a06:98c0::/29;

set_real_ip_from 2c0f:f248::/32;

real_ip_header CF-Connecting-IP;

Restart Nginx and you’ll start seeing original IPs in your logs.

Useful links

The bash script may run manually or can be scheduled to refresh the ip list of CloudFlare automatically.

https://github.com/ergin/nginx-cloudflare-real-ip

How to Check if a Given IP Address is IPv4 or IPv6 in C#

2024-02-09T02:04:10Z

There are various ways to check if an IP address is IPv4 or IPv6.

Example 1: Using IPAddress.TryParse() Method
Example 2: Using Regex
Example 3: UsingSystem.Net.IpAddress

System.Net.IpAddress can be used to check whether it is IPV4 or IPV6 address.

Add Namespaces

using System;
using System.Net;
using System.Net.Sockets;

use IPAddress.Parse(ipv6address)

var ipv6address = this._httpContextAccessor.HttpContext.Connection.RemoteIpAddress.ToString();

var headers = this._httpContextAccessor.HttpContext.Request.Headers;

if (headers.ContainsKey("X-Forwarded-For"))
{
    ipv6address = headers["X-Forwarded-For"].ToString().Split(',', StringSplitOptions.RemoveEmptyEntries)[0];
}

ipv6address = headers["CF-Connecting-IP"].ToString();

IPAddress address = IPAddress.Parse(ipv6address); /* https://learn.microsoft.com/en-us/dotnet/api/system.net.ipaddress.isloopback?view=net-8.0 */

var isipv6address = false;

if (address.AddressFamily == AddressFamily.InterNetworkV6)
    isipv6address = true;
else
   if (IPAddress.IsLoopback(address) && address.AddressFamily == AddressFamily.InterNetwork)
    isipv6address = false;

source:https://learn.microsoft.com/en-us/dotnet/api/system.net.ipaddress.isloopback?view=net-8.0

useful links

https://www.tutorialsrack.com/articles/413/how-to-check-if-a-given-ip-address-is-ipv4-or-ipv6-in-csharp

How to Get Client User IP Address In ASP.NET Core Web API

2024-02-09T01:53:19Z

How to Get User IP Address In ASP.NET Core Web API.

This page summarize information about how to retrieve client and server IP address in ASP.NET Core web applications.

Get client user IP address

Client IP address can be retrieved via HttpContext.Connection object. This properties exist in both Razor page model and ASP.NET MVC controller. Property RemoteIpAddress is the client IP address. The returned object (System.Net.IpAddress) can be used to check whether it is IPV4 or IPV6 address.

public string ClientIPAddr { get; private set; }

public async Task<IActionResult> OnGetAsync()
{
	// Retrieve client IP address through HttpContext.Connection
	ClientIPAddr = HttpContext.Connection.RemoteIpAddress?.ToString();
	return Page();
}

Access HttpContext in ASP.NET Core

Refer to documentation Access HttpContext in ASP.NET Core | Microsoft Docs to understand the details of accessing HttpContext in ASP.NET Core applications.

For requests forwarded by proxy servers

This means the client IP of HttpContext.Connection.RemoteIpAddress is the IP address of the proxy servers.

If the HTTP request is first processed by a reverse proxy server, the only approach to get the client IP address in server side is to look into the forwarded headers if there are any. For example, Retrieve Client IP Address in cloudflare with HTTP Ingress.

    var headers = this._httpContextAccessor.HttpContext.Request.Headers;

    if (headers.ContainsKey("X-Forwarded-For"))
    {
        ipv6address = headers["X-Forwarded-For"].ToString().Split(',', StringSplitOptions.RemoveEmptyEntries)[0];
    }

    ipv6address = headers["CF-Connecting-IP"].ToString();

A Simple Public IP Address API

2024-02-09T03:22:51Z

API Usage

Using https://www.ipv4ipv6.net/is ridiculously simple. You have three options. You can get your public IP directly (in plain text), you can get your public IP in JSON format, or you can get your public IP information in JSONP format (useful for Javascript developers).

Code samples 1

var httpClient = new HttpClient();
var ip = await httpClient.GetStringAsync("https://www.ipv4ipv6.net/api/IpAddress/");
Console.WriteLine($"My public IP address is: {ip}");

output

My public IP address is:98.28.39.165

Code samples 2

using System;
using System.Net;

namespace Ipify.Examples {
    class Program {
        public static void Main (string[] args) {
            WebClient webClient = new WebClient();
            string publicIp = webClient.DownloadString("https://www.ipv4ipv6.net/api/IpAddress/");
            Console.WriteLine("My public IP Address is: {0}", publicIp);
        }
    }
}

API URL	Response Type	Sample Output (IPv4)

`https://www.ipv4ipv6.net/api/IpAddress/`	`text`	`98.207.254.136`
`https://www.ipv4ipv6.net/api/IpAddress/?format=json`	`json`	`{"ip":"98.207.254.136"}`

How much of the world uses IPv6?

2024-02-09T01:55:50Z

Since it's been around longer, IPv4 is more widely used, but IPv6 adoption is growing as addresses on the older IP run out. According to Google data, around 40% of the world has adopted IPv6 as of June 2023. Google also breaks down that data by country, which varies pretty widely. The U.S., for example, is at over 50% adoption while Australia is at just over 29%, Sweden is at 19%, and Argentina is at 18.4%.

Is IPv4 faster than IPv6?

2024-02-08T17:43:00Z

Most of the time, IPv6 doesn't appear to be much faster than IPv4. Cloud-based tech company Sucuri tested the two IPs against one another in multiple scenarios and didn't appear to find much of a difference in speed.

There are some situations where IPv6 seems to be faster, though. Facebook ran a test back in 2015, for example, and determined its website loaded 10-12% faster on IPv6. The large number of variables between the two makes it difficult to see which is faster without extensive testing in a highly controlled environment.