Whenever you use the internet through a modem, you are using a connection given by an Internet Service Provider(ISP).
Each computer connected to a router has two IP addresses.
- The WAN IP or the Global IP: This is the IP of your router and all computers connected to a particular router will have the same Global IP. Generally these routers have dynamic IPs ,ie, the IP changes each time you reboot the router.They can have static IPs as well but that involves a long procedure. Want to check your Global IP? Go to www.ipchicken.com.
- The LAN or the Local IP: A router may have more than a single computer connected to it. Now as I mentioned, the global IP of each computer remains the same as that of the router. If any information was to be passed to a specific computer in the router's connection, it would be impossible to differentiate between the different computers. Hence LAN or local IPs are used. They uniquely identify computers in a LAN. To check your LAN IP, type ipconfig in cmd if youre using windows and ifconfig in the terminal if youre using a linux based OS.Generally this IP is something like this: 192.168.1.1 .
While youre browsing the internet, your WAN IP is visible. Anything wrong you do, they'll trace your IP to your router and youre done for.
Its always better to do it through a friends router or use proxy services.
The LAN IP address of a machine changes each time you disconnect and reconnect to a network, there are a few simple commands to set it to a static value, but this is the general scenario.There is one thing about your router, your laptop, your mobile or anything that uses the internet. Its called a MAC Address.
Its a hexadecimal code that is related to the hardware. It doesn't change, ever. The MAC address looks a bit like this: 1E:4D:58:9C:76:3A
You want to hack WiFi networks, you have to spoof your MAC.Can it be done? Yes. Wait and read on.
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