About classes of IP
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  • 1 Post By mahadev

Thread: About classes of IP

  1. #1

    Join Date
    Oct 2011
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    Roumania and Puerto Rico
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    65

    Default About classes of IP

    I have a question that i have not yet found conclusive answer . Many of us have dynamic IP and how they shared classes on 4 classes , I wonder what happens when someone changes an ip and this ip banned from a forum in which it is used?this take BAN ?without having anything wrong?



    Thank's


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  3. #2

    Join Date
    Dec 2010
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    2,427
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    Well, there are stuff like gateways, physical addresses, and subnetworks after subnetworks. Also, your ISP and city can be traced. You can be traced even if you would use thousands of routers. Basically, there are other unique markers for your IP, and they cannot be changed unless you change your ISP or country etc. It's the reason why hackers try to take over wireless networks. An example, if someone knows your network card configuration and your ISP's DNS (or something else for that matter) then changing an IP won't matter. In this case changing a county won't do you any good too. lol And this is only network level. Also, your OS, OS hostname, browser, cookies, browser sessions etc. are unique.
    Last edited by silentninja; October 18th, 2011 at 07:12 AM.

  4. #3

    Join Date
    Oct 2011
    Location
    Budapest
    Posts
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    An ISP has a certain range of IP addresses. For example I go to a site, like What Is My IP Address? Lookup IP, Hide IP, Change IP, Trace IP and more... and check my IP, suppose it's 78.92.81.89 (it's not but it's an example, an IP from my ISP).
    Then I go to Database Query, copy paste my IP in the search box, check ALL under "Global Resource Service" and press search.
    Among a lot of irrelevant text blocks like 'Not allocated by...' or 'Mirror', or ''IANA...", there will be one that says:

    inetnum: 78.92.80.0 - 78.92.87.255
    netname: ADSL-20071114
    descr: T-Online DSL Client pool
    descr: Hungarian Telecom
    country: HU

    (not much secret I posted speedtest screenshots so I suppose this is nothing more)

    So you will see my provider.
    If you're admin of this forum and want to ban me you can ban that range - but then you'll ban everyone coming from the ADSL range of this provider which is a lot of people.
    But instead you take a look at the logs and maybe notice there's only 3 people on the forum coming from this IP range regularly. You ban me, and if after a couple days there will be a new person from same IP range it's likely that it's me again. Pretty much works the same for any website, or trcker, or ftp or whatsoever.

    So even tho many people have dynamic addresses (especially adsl i suppose), normally one doesn't need to ban an IP or a certain range to get rid of someone. It just requires a little work.

    (I never administered 'public' stuff or banned people from anywhere, this is just an idea how it could be done)

    I doubt your MAC address can be seen, but you could be authenticated based on existing site cookies on you hard drive (that's how facebook or google can trac us even if logged out).
    silentninja likes this.

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