Often you will want to know the IP address of someone visiting your website. While ASP.NET has several ways to do this one of the best ways we’ve seen is by using the “HTTP_X_FORWARDED_FOR” of the ServerVariables collection. Here’s why… Sometimes your visitors are behind either a proxy server or a router and the standard … Read more
Don’t parse it. Just ask. import socket try: socket.inet_aton(addr) # legal except socket.error: # Not legal
Using C#, With webclient its a short one. public static void Main(string[] args) { string externalIpString = new WebClient().DownloadString(“http://icanhazip.com”).Replace(“\\r\\n”, “”).Replace(“\\n”, “”).Trim(); var externalIp = IPAddress.Parse(externalIpString); Console.WriteLine(externalIp.ToString()); } Command Line (works on both Linux and Windows) wget -qO- http://bot.whatismyipaddress.com OR curl http://ipinfo.io/ip
I found the ioctl solution problematic on os x (which is POSIX compliant so should be similiar to linux). However getifaddress() will let you do the same thing easily, it works fine for me on os x 10.5 and should be the same below. I’ve done a quick example below which will print all of … Read more
See the documentation on how to access the Request object and then get from this same Request object, the attribute remote_addr. Code example from flask import request from flask import jsonify @app.route(“/get_my_ip”, methods=[“GET”]) def get_my_ip(): return jsonify({‘ip’: request.remote_addr}), 200 For more information see the Werkzeug documentation.
I am not sure if you can grab that IP from code that runs on the local machine. You can however build code that runs on a website, say in JSP, and then use something that returns the IP of where the request came from: request.getRemoteAddr() Or simply use already-existing services that do this, then … Read more
The simplest way to get the visitor’s/client’s IP address is using the $_SERVER[‘REMOTE_ADDR’] or $_SERVER[‘REMOTE_HOST’] variables. However, sometimes this does not return the correct IP address of the visitor, so we can use some other server variables to get the IP address. The below both functions are equivalent with the difference only in how and … Read more
As it turns out, the recent WebRTC extension of HTML5 allows javascript to query the local client IP address. A proof of concept is available here: http://net.ipcalf.com This feature is apparently by design, and is not a bug. However, given its controversial nature, I would be cautious about relying on this behaviour. Nevertheless, I think … Read more
If you are running behind a proxy like NGiNX or what have you, only then you should check for ‘x-forwarded-for’: var ip = req.headers[‘x-forwarded-for’] || req.socket.remoteAddress If the proxy isn’t ‘yours’, I wouldn’t trust the ‘x-forwarded-for’ header, because it can be spoofed.
According to this answer, it is possible, but rarely used. As for how to get it: I would tend to simply try and order one with the provider of your choice, and enter the IP address instead of a domain during the ordering process. However, running a site on an IP address to avoid the … Read more