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PO
 

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    <blockquote> <p>I got the IP address by right-clicking on the connection, status, support.</p> </blockquote> <p>Not sure about the "support" part, and I'm not on a Windows machine right now, but I think that the most easy and reliable way to figure out the IP address on Windows is to run "ipconfig" from the command line (Win+R, type "cmd", then "ipconfig" in the opened window). This, of course, should be done on the server side.</p> <p>However, the problem is that depending on the ISP your IP address may be not within the Internet, but within a local ISP network (so-called NAT). In this case, you'll need to use some sort of black magic called <a href="http://www.brynosaurus.com/pub/net/p2pnat/" rel="nofollow">TCP hole punching</a>, which is very complicated and not guaranteed to work. You can figure out if your address is local or not by looking at it. For IPv4 local addresses are almost always like 10.x.x.x or 172.16-31.x.x, or 192.168.x.x. Don't know about IPv6.</p> <p>You can also check your IP by visiting one of the special sites like <a href="http://www.whatismyip.com/" rel="nofollow">www.whatismyip.com</a>. If the address they tell you is different from the one you see by running "ipconfig" or looking at the connection properties, then you're almost certainly behind a NAT (or your ISP is using a transparent proxy, but that's rare).</p> <p>If you are directly connected to Internet (no local addresses and NAT), then you should also check if you have any firewall software and either to configure it to allow connections to the port you use, or make sure it's in "ask the user" (and not "silently reject") mode, or just disable it completely (this may put your computer at risk, especially if there is no anti-virus software or the system isn't up-to-date).</p> <blockquote> <p>Also, is it possible to get a fixed name for my computer that I can use instead of entering the IP address, as this changes every time I connect to the internet using my mobile phone?</p> </blockquote> <p>Yes, it's possible. There is the thing called DynDNS, and there are DynDNS providers like <a href="http://www.dyndns.com/" rel="nofollow">DynDNS.com</a>, where you can get a third-level domain name for free (like mycoolpc.dyndns.org). You'll have to install and configure some DynDNS client on your PC that will tell the DynDNS server its new IP each time each changed. I don't know anything about particular clients to use because I'm using the one built-in in my home router.</p>
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    1. POHow do I send data between two computers over the internet
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    1. USSergey Tachenov
    1. USSergey Tachenov
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    1. COThanks, I checked and my IP address starts with 41. If I am not behind a NAT should the IP address that used work? How do I get my IP address "within the Internet"? Should I use DynDNS to accomplish this?
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      1. USJohan
    2. CO@Johan, if it starts with 41, then you are probably directly connected to the Internet. Did you compare the address returned by "ipconfig" to whatever whatismyip.com says? If they are the same, then you're definitely safe. You should use this address at the client side to connect. If you have firewall software, you may have to disable it or configure to open the port used. DynDNS is not used to obtain IP addresses, it just registers a name for you, and a DynDNS client updates this name to point to your IP address each time it changes.
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      1. USSergey Tachenov
    3. CO@Sergey, yes they are the same. I'll try a few other options, it could be the firewall or something like that.
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