when I am connected to the net, and type ipconfig in command prompt, or I check my local area connection status, I get a certain IP address that I assumed is assigned by DHCP. But when I check a site like whatismyip.com. I get a whole different IP address that I can't seem to get anywhere else in my computer. What is up with that.
2007-06-12 03:58:19 · 10 answers · asked by croccifixio 2 in Computers & Internet ➔ Other - Computers
If you are using a router (some broadband modems have them built in) you actually have 2 different networks.
Most routers use a technology called NAT. Basically, it works like this:
You modem allows your router to connect to your ISP, and your ISP assigns your router an IP address. This address is a "Public" address, in other words, it is accessible from anywhere on the internet.
Your router has a built-in DHCP server that hands out addresses to all connected devices. This is called a "Private" address, as it is only accessible from your side of the router.
The router receives network requests (for web pages and whatnot) from devices on the Private side and hands that out through the Public connection to the modem, and then waits for the response. When a response is sent back to the modem it goes to the router, which then look up the Private IP of the device which requested the info and passes it along.
Thus, NAT routers are also firewalls in that they do not allow unsolicited packets through, because no one requested them.
Routers can be configured to forward unsolicited packets received on a designated port to a Private IP, allowing you to run your own webserver, gameserver, mailserver, and whatnot. This is also handy for gaining access to files stored on a computer at home while you are on the road.
2007-06-12 05:00:22 · answer #1 · answered by Steven K 1 · 0⤊ 1⤋
1. You can have any number of IP on one computer. Even one Ethernet card can have any number of IPs 2. does it keep the same IP address or uses a different IP address? It is you to decide to keep or change. If you move to a different network you may have to change the IP. It is like your home address. Imagine you moved your home from one town to another. 3. How do I find out what network I'm connected to? No single simple answer here. You may have to start by asking the person responsible for your network.
2016-05-18 01:11:16 · answer #2 · answered by ? 3 · 0⤊ 0⤋
The IP address assigned by your router is the one for your local network. This is a separate range of IP addresses than the internet. When you connect to the internet, you are probably going through the same router as the DHCP is on. That router obtains an IP address from your ISP (or get the one that's statically assigned if that's the case). That IP address is the one seen by whatisyourip.com.
Its simply a case of two different networks, the local one your router manages, and the network your ISP uses.
2007-06-12 04:04:25 · answer #3 · answered by Isofarro 3 · 1⤊ 0⤋
The IP address you see on whatismyip.com is the IP of your internet service providers server. This computer takes traffic and assigns it to you through DHCP.
2007-06-12 04:03:55 · answer #4 · answered by Thomas T 4 · 1⤊ 0⤋
Welcome to the world of NAT.
Remember back a few years when people were screamin that we are going to run out of IP addresses? So a bunch of organizations spent large amounts of money developing IPv6?
Well NAT fixed all this. Its called Network Address Translation. Its similar to a proxy, i.e. all computers connect to the internet through one IP address.
Nat installed on a gateway will give the network you are on its own network range and assign Hosts all sorts of host addresses. While the ip address it uses is totally different.
Going back, you network only needs 1 internet IP address and that is NAT-ed into your network.
2007-06-12 05:01:24 · answer #5 · answered by Anonymous · 0⤊ 0⤋
The ip you get with ipconfig is your local network ip that your router has assigned your computer. The one you get at whatismyip.com is your ip assigned by your ISP to your modem.
2007-06-12 04:02:21 · answer #6 · answered by Yoi_55 7 · 2⤊ 0⤋
One is the IP of your local network (or between your computer and modem/router) and one is your 'public' IP, the one the internet sees.
2007-06-12 04:04:00 · answer #7 · answered by Anonymous · 1⤊ 0⤋
you on a network?
the web site is your public ip
the other is your local network ip
2007-06-12 04:02:45 · answer #8 · answered by Anonymous · 1⤊ 0⤋
IP adresses change when u turn on the computer...
2007-06-12 04:05:55 · answer #9 · answered by Anonymous · 0⤊ 0⤋
i am interested. do you see this?
Your IP Is 219.93.153.253
2007-06-12 04:03:16 · answer #10 · answered by ddsa 2 · 0⤊ 2⤋