My ipv4 adress doesn't say the ones you listed on the guide, what should I do? (It's 25.13.197.179)
This means your router (if you have one) isn't doing any NAT. Are you the only computer on the network?
You probably don't even have to worry about port forwarding since your computer has been is assigned your public (external) IP address.
Here is a short explanation:
When you connect your modem to the internet it requests a public IP address from your ISPs servers. The server replies and leases your modem a public IP address.
Multiple computers can't be assigned the same IP address without causing problems, that is where routers come in.
Routers will assign your computer a private IP address. The three private ip address ranges are: 10.X.X.X, 172.16.X.X, and 192.168.X.X. These addresses can never be "used on the internet". Your router does something called NAT (network address translation). I will use requesting a web page as an example.
If you request a web page from your computer (going to
www.google.com in a web browser) your computer sends the request using the private IP address, when it gets to your router NAT is used to basically switch to your public IP address to make the request. Google receives the request and sends the requested information back to your router using your public IP address. The router then uses NAT again to forward the information back to your computer using the private address.
Think of it like an office telephone number and extensions. Your office telephone number is your Public address. Anyone can pick up a phone and call the office and the secretary/phone system (router) will answer. The secretary/phone system will then forward the request to your extension (private IP address) so you get the phone call. Only people in your office (network) can call you by dialing your extension. Anyone outside the office (network) has to dial your phone number.
NAT was created because the world was running out of IPV4 addresses. Before it existed each device that connected to the internet needed a public IP address. And like I said before, no two devices can have the same public IP address. With NAT many computers can effectively use the same public IP address.
You may have heard of IPV6. This is the next version of IP addresses. They aren't 4 octets anymore, they are much longer. Which means that there are MANY MANY more possible addresses. In total there are only 4,294,967,296 IPV4 addresses. Which seems like a lot, but now that more of the world is connecting to the internet that number is actually VERY low. With the new protocol IPV6 there are a possible 340,282,366,920,938,463,463,374,607,431,768,211,456 addresses. Not all of which are allocated to be public.... but we won't be running out of them any time soon. Not many people on our side of the world use IPV6 yet, but eventually I think everyone will.
If you really want to learn about this stuff:
Let me Google that for you!
