How do I connect to the internet using another computers IP address?

I saw a friend of mine use his centrino to connect to his friends computer , I think just by using the same IP address as his friends.

I asked him how he did it but he refused, can someone please talk me through the steps or give me a link that might enable me learn this.

Also, I just wanted to know if it will work out if the host computer was connected to the internet via dial-up?
olienzigyAsked:
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MATTHEW_LConnect With a Mentor Commented:
Ok, but you said he wasnt using wireless or a cable, so there must be more to it then that.  There must be some form of a physical connection, whether it be Wired, Wireless, bluetooth, infared, something.
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MATTHEW_LCommented:
When you say connect to his friends computer do you mean view his friends desktop via the internet or just browse files, a web page etc?  Let me know.

If you are just talking about viewing his friends desktop via the internet their are some applications that allow this.  Some to check out would be UltraVNC, Dameware, or just the plain Microsoft Remote Desktop Client.  

HTH

Matt
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olienzigyAuthor Commented:
Hey Matt,
You probably right, didnt properly frame my question. I actaully meant his able to browse the internet when connected. About the remote desktop client thing, can u also let me know how this is done as I am a novice ad have tried using it several times but doesnt ever work, dont know if it has something to do with the operating system coz we both use winXP home, cheers!
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MATTHEW_LCommented:
Ok.  To start with for the remote desktop client there a a few things you need to keep in mind.  One remote connections must be enabled on the PC that you want to "connect" to.  To check this right click my computer, go to properties, click the remote tab, ensure both check boxes are checked.  Thats the first step.  Another thing is to make sure the Windows firewall is not going to block the remote connection, go to control panel and open up the windows firewall.  You can either turn it off, or better yet add an exception for the remote desktop service so that it allows it in.  Under the exception tab in windows firewall make sure there is a checkbox next to remote desktop.

Now you've taken care of what needs to be done on the PC to connect.  If your friend is using some form of Router like netgear, dlink, linksys, etc, you will need to have him do what is called port forwarding.  Alot of times it is listed under the applications and gaming section on the router web interface.  What you need to do is add an entry to forward port 3389 (the port microsoft RDP uses) to the internal ip address of your friends computer.  This is only if he is using a router, if he plugs directly into a dsl modem or calbe modem or even dial up internet you will not have to do this.  At this point you should be ready to connect remotely to your friend.  Open your remote desktop client and input the public IP address of your friends computer.  If you or him do not know this have him go to http://whatismyip.com and have him tell you the ip.

Hope this helps let me know if this is the answer your looking for or still have other questions,

Matt
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olienzigyAuthor Commented:
Hi Matt,

Thanks for the answer, u hav actually answered the second question, was hoping both will be answered. Well the first one was that.....My friend's mate was able to use his centrino laptop to connect to the internet (for browsing) without a cable, rather he did so by using the same IP address as my friends computer, not sure exactly how he did this but would like to learn it.

But u have perfectly answered the second question, thanks 4 that one
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MATTHEW_LCommented:
If you are referring to connecting to the internet without a wire.  You can do that via a Wireless network...Is that what you are getting at for the first question?
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olienzigyAuthor Commented:
No, there is no wireless network in that area, as a matter of fact my friend uses a cable to connect to the internet, but his mate has got a wirless laptop. So like I said earlier, I think he basically used the same IP address as my mates and was able to get connected to the internet though my mates computer...really dont know how he did it but i was there when he did so.
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MATTHEW_LCommented:
So when he is connecting via a network cable, he plugs this into your friends laptop?  Or does he plug this into some form of a router.  There are a couple things that he could be doing, he could be using Internet Connection Sharing via your friends laptop, or is just plugging into a switch / router that allows them to share internet access.  The latter of the two would more likely.  
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olienzigyAuthor Commented:
Believe me, he did not plug his laptop onto anything, he was just sitting on the bed side when he connected. I'm not not so much of a novice, so I would actually know if he pluged it onto a router or another computer
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olienzigyAuthor Commented:
Thanks anyway for the try but i think i found what i wanted, it actually a Ad-hoc connection. I c u were getting there. Now worries I'll hand u the points, cheers!
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MATTHEW_LCommented:
Ahhh....So wireless Ad hoc, should have thought of it.  Good work.
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olienzigyAuthor Commented:
Well its all gud, problem solved
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