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For example, you may need to tell a tech support person your public IP address if you lose your internet connection or if you want to give someone permission to administer your network remotely. Even if you think you know your public IP address, you should check anyway because it may have changed. The difference between static and dynamic addressing is at the root of a lot of connectivity problems.
If you want to learn more, you can read about the differences between IPv4 and IPv6, and which is better. There are several simple ways to identify your public IP address.
Another way to find your public IP address is to use Google search. Remember: all these tools tell you your public IP address -- the one the internet uses to find your network -- not the local IP address behind your router. Your public IP address is public.
Keep a History of your External IP Addresses
Just as there are tools that let you find your public IP address, there are tools that let other people find your public IP address, too. That might alarm you, and rightly so. Everything you do online is tagged with your IP address: your emails, your online shopping activity, your browsing history. Someone who knows your IP address can identify your location, just as you can. But a motivated stalker or criminal might make that effort; so may law enforcement.
Thanks a lot!! I think a better way to convey the mac address is to liken it to a post office box.
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You have a specific box number assigned to you. And if you decide to change it later, you can. In response to the Vagaters comment: Vagaters uses a mix of data available through the browser and http connection to try to identify banned users. Regular IP or cookie bans, which most other chats use, have proven to be inefficient.
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The site uses the camamba. Leo — Thanks for the insightful piece. As you have noted in many other posts, the recipient of an email sent from Google, Yahoo, etc can often glean the IP address from which it was sent. Thanks, J Levin. Hi Leo, Very well explained and similied. Thank you. Thanks a lot. Very simply and effectively u clarified my doubts Thanx Leo…. I was very much confused initially but now very much relaxed. Post office example was awesome. Well stated Leo. Could you further expand on the difference with a mobile device MAC address vs a standard desktop or laptop? I logged into my wireless network and someone hacked into my network.
Can that be traced to the exact location if I provide the Mac Address? Mac You could only determine who hacked into your account if you know who happens to own the machine with that MAC address. There is no registry where MAC address are stored. I have a doubt.
What's my (external public) IP address (command line)? | cawdloristabo.tk
In data link layer we use mac address. Why can not we use ip address instead of mac address in data link layer. Using your analogy, if the color of my mailbox has changed then my mail carrier should still be able to deliver the mail, correct? Recently one incident happened in our office. Someone sent emails from rediff to one girl and the IP address shown was of our office.
The police found our office IP and they found some port no. I am confused how the ISP gave port no. My friend is genuine and he hasnt done aytign wrong. They only typically go as far as the first router.
Using the metaphor, if all incoming mail is addressed only to the mail room how does the mail clerk know who to send it to? Packets coming into the router can only be responses to packets sent by a computer within your network. Think of the packets you send out as having a complete return address so responses know where to go. Packets which are not responses — i. Thanks Ray.
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I will reword my question. There are probably many internal computers, how does the router choose between them? In simpler term, the router knows it was your computer sending the outgoing packets, so it knows where to send the incoming packets which come in response to the request.
MAC addresses were originally meant to be pre-allocated and unchangeable but some devices [often home Internet routers] allow MAC addresses to be changed. IP addresses are also allocated to network devices [that are enabled and connected]. If you connect a laptop wirelessly and with an Ethernet cable to your Router, you will have two IP addresses, one for the network cable with the cable pugged in and one for the wireless adapter. I wish I had thought of it when I was teaching this subject. Hey Leo, Just wanted to point out that your posts are great!
You make it very easy to understand for guys like me who are new to the IT world. Please keep them coming. Spoofing or masking your IP Address can be traced only so far depending on how many changes that address makes.
What’s an IP address, and how does it work?
Great article! Hello, I got a pc from my friend, it was his old pc but with a new hard drive. My question is do i have his MAC address now or do i have the same one i had with my old pc? Also if i have his MAC address can i see which websites he visited and how can i delete it? PC was formated and cleaned with new hard drive. What matters is: this technique wifi mac sniffing plus big data analysis can make a very accurate portrait of you so they can send you very accurate ads; they can conduct very accurate location tracking using this technique as well.
A LOT of things have to happen for that scenario you outline to play out. Tetsujin 64k 15 15 gold badges silver badges bronze badges. Okay thanks for confirming that it is the router making all of the public IP's look the same.