how to find my own IP address
The next piece of code actually seems to work on linux even if the remote port is not accessible or, more amazing, if the remote host doesn't exist. Again, this is not a general solution because it doesn't work on solaris which of course is where I needed it!
For a non-existing host or port it just returns 0. A modification to find the publicly addressable IP of your machine:. Depending on your setup, this procedure may take up to six minutes to complete DNS timeout and route timeout for eleven servers. For me it typically takes a fraction of a second. Likely you want to know all your IP addresses, not just the one the whole world knows about.
Java program to find IP address of your computer
This works nattily on Solaris and Linux , and some poor sod might extend it to work on windoze:. DKF : That info is probably available through the ipconfig program, though I've no idea what it returns on machines with multiple network addresses. Later, I didn't work on this anymore because I wanted to use a better method.
The dns package looked promising.
Mike Tuxford adds Similar to the ifConfig proc above for Linux, when you know the location ifconfig and only need one interface IP, which is perhaps the most common case, the below should work. FW : Or, to see what IP your machine is seen from the outside, do some web scraping :.
A problem with some of the above solutions is that they rely on parsing the output of some other program and hence will not work on localized operating systems.
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Plus, it just doesn't feel clean. Parsing ipconfig is iffy, has no guarantees with multihomed machines including those with virtual NICs.
Fortunately, on XP-class Windows boxen, it's actually much easier to do it the internal way. Via twapi or ffidl, you can hit a couple of Windows APIs; one that will tell you the IP address of a specific interface, and another that will work out the interface for a given route. Combining those, we can grab the IP for a given side of the PC, without having to go out to the network although it needs to be connected.
This proc has a couple of advantages; it doesn't need the internet it needs a network, else there isn't an IP to return, but it doesn't actually connect to anything to retrieve the IP.
It's entirely self-contained ,it will ignore disconnected interfaces so if your lan is unplugged, and you are connected via WiFi, that's the interface you get and on a multihomed machine, it will ive you the IP for the interface that is pointing to the IP you give it. Also, the IP you give it doesn't have to exist. It's longer than it probably needs to be. Filtering out Based on information provided by kbk in the Tcl Chatroom I made the following code that will obtain most information you may ever want to know about the available network interfaces:. The above example command would change the IP address of the Local Area Connection network connection to It would also set the Subnet Mask to The below information is for how to specify and adjust your network settings through the command prompt.
Changing your network settings will require root access. Someone who's outside your home network and does not have access to your network router cannot change your IP address. Do not be concerned about your computer's security if your IP address has changed. It's more likely that it's normal behavior than an attack.
How-To Find Your Local IP Address In Windows 7 or Vista
How do I change my IP address? Additional information How to find my IP address. How to change the IP address of an Android phone or device.
How can I fix an IP conflict? How to determine the IP address of a computer or website. How do I determine the physical location of an IP address? However, the router has its own IP address that the connected devices use to communicate with it and also another one that the router uses to interface with the internet. Some people change their public, external IP address to avoid online bans or to bypass country location restrictions that some sites impose on video content. An external, public IP address is the address used to communicate with networks outside of your own, like those on the internet.
This practice isn't common for home users since most are configured with a dynamic IP address , but it might be the case for you, in which case you can contact your ISP to request a new, static IP address. You can't change your external internet IP address on your own. The local IP address assigned to your router and any device behind the router, is called the private IP address.
Check out our tips for finding the default gateway IP address of your router and your computer's IP address. To change the router's IP address, log in to the router as an administrator.
How to Change Your IP Address
From the control panel, change the IP address to whatever you like. However, this IP address is usually changed when there's a problem with it. The default IP address should suffice for most situations. Another way to change a static IP address is to first find out where the address is being assigned from.