CODEWITHSUNDEEP
ipip-address
Al Renaud
Al Renaud

Reputation: 71

How can we know our own external ip address on the client

How can we know our own EXTERNAL IP address on the CLIENT (=our computer); NOT our internal IP address, NOT through an existing web site, NOT through a new website we would fabricate for this question; JUST with pure client OS commands scripting and/or JavaScript? Is that possible? In fact, if someone as a way to do that they should collect 1 million dollars because nobody has EVER come up with an answer to that on ANY website on this planet to my knowledge, A.R.

Upvotes: 0

Views: 450

Answers (4)

Chong Yu
Chong Yu

Reputation: 470

As Gricha mentioned, it can be requested via external site. There is an open source project that is also hosted.

You can get your external IP info in JSON format by calling this API:

curl http://ip2country.sourceforge.net/ip2c.php?format=JSON

in C#, there must be a similar method to call web API.

The project info is here: http://code.google.com/p/ip-address/

Upvotes: 1

pollirrata
pollirrata

Reputation: 5286

I think somebody DID ask that already, but using C#

IPHostEntry host;
string localIP = "?";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
    if (ip.AddressFamily == AddressFamily.InterNetwork)
    {
        localIP = ip.ToString();
    }
}
return localIP;

I don't know the OS you're targeting, but you might create an console application and read the value from it

Hope it helps

Upvotes: 1

Gricha
Gricha

Reputation: 1032

You can't do that without going out of your current network.

To know your IP address you need to ask your router about. It's your router that gives you the IP in his network.

To know the IP address that belongs to your router in their network - you need to ask someone in that network about your IP. Because that network gives him an IP.

Finally if you want to know your IP outside your ISP's network - you need to ask someone outside your ISP's network about it.

Upvotes: 0

Alden
Alden

Reputation: 2269

You can't find an external ip address from a simple system call. You can receive it from the router, which is probably router specific, or you need to make a call from an something out side of your lan. Typically this is done through a HTTP request or some other popular internet service.

Also, individual computers on a local network don't have an external ip. The router has one address and forwards packets to the individual device.

Upvotes: 0

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