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Question about IP addresses

Discussion in 'Forum Management' started by Brian123, Feb 4, 2007.

  1. #1
    On my forum, I have 3 people with the same IP address.
    Is it likely to be the same person with 3 accounts, or is it possible for different people to have the same IP address?
    SEMrush
     
    Brian123, Feb 4, 2007 IP
    SEMrush
  2. Jacqueline

    Jacqueline Well-Known Member

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    #2
    Different people can have the same IP address, and it is quite common.

    When people connect to their ISP with a modem, they get handed an IP Address out of a pool of IPs. They use it while they're online, then when they hangup and are no longer using it, their IP gets put back into the pool. When someone else calls, they get the same IP. So if two people do not know each other, but they use the same Internet provided, then they will show with the same IP address. You'll find when you look at these accounts that they post from a lot of IPs as it changes all the time.

    Another example happens for larger ISPs, such as AOL. There are not enough IPs to go around for everyone that connects to their service, so they use a technique called NAT (network address translation). Basically, it makes it so that hundreds of people can go out using the same IP address through the translation. You will typically see multiple IP addresses for the user similar to the example above.

    You can do a dns lookup on the ip addresses to get an idea of what is going on with it.

    If you have two users posting from the same IP address and that IP address never changes, then the chances are good that they are posting from the same computer.

    I hope that helps!
     
    Jacqueline, Feb 4, 2007 IP
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  3. Smyrl

    Smyrl Tomato Republic Staff

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    #3
    IP address alone does not necessarily tell the story. If using a dialup connection you have no control over the IP you are using and it is subject to change each time you log in. If member always posts from the same IP, member probably is on static IP. You could have members from same company posting, or members from same household. Check to see if these members bump each other's threads, are online at the same time etc for other hints.
     
    Smyrl, Feb 4, 2007 IP
  4. Brian123

    Brian123 Well-Known Member

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    #4
    Thank you both for those very well written answers.
     
    Brian123, Feb 4, 2007 IP
  5. Diether

    Diether Peon

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    #5
    As long as they are not spamming or causing trouble I wouldn't worry to much about it.
    It's like Jacqueline and Smyrl said, could be people from the same company (or school), same house,...
    So not much to worry about :)
     
    Diether, Feb 5, 2007 IP
  6. Brian123

    Brian123 Well-Known Member

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    #6
    Not its not a spam issue, it's a moral one. You see I know this person, and in one account he has made some very good posts, but on another account he has lead everyone to believe he is someone he is not.
     
    Brian123, Feb 5, 2007 IP
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  7. Diether

    Diether Peon

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    #7
    If you know him, can't you just ask it then?

    "I saw a few accounts with a the same ip as yours. Any chance you registerd a couple of times" or something similar ?
     
    Diether, Feb 5, 2007 IP
  8. Brian123

    Brian123 Well-Known Member

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    #8
    Problem resolved!
    He didn't have two accounts, because the other person was online same time as him, and one of the IP addresses was a works one.
    When they are both at home, both IP addresses are the same though?
     
    Brian123, Feb 5, 2007 IP
  9. Jacqueline

    Jacqueline Well-Known Member

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    #9
    I'm glad you solved it!
     
    Jacqueline, Feb 5, 2007 IP
  10. pepsicola27

    pepsicola27 Guest

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    #10
    I think this guy is a Dr. Jeckel and Mr. Hyde. Although weird, I know people who would do this to either make themselves appear more insightful than others.

    My friend has a technical forum and creates dummy posts that ask technical questions then he logs in with his smarty-pants account and answers his own questions. I know that he's trying to populate his forum instead of having someone else do it for money.

    As far as your poster, You can not have the same IP at home and at work. You can remote control your home computer but it's not possible to get the same IP at home and at work. His company most likely has a business class internet connection unlike the residential cable/dsl offered for home use. And these are almost always on different backbones that use different addressing schemes.

    Compare the posts from each user ID and see if there are similarities in spelling, punctuation, slangs, etc. It's not unheard of for people to create more than one account. After all, some people really believe in the anonymity of the Internet.

    My 2 cents.
     
    pepsicola27, Feb 6, 2007 IP
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