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Resolved Fix IP Address being highjacked

Discussion in 'Networking (Hardware & Software)' started by FuzMic, 2016/11/20.

  1. 2016/11/20
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    Hi fellows

    I use fix ip address because an accounting require it fixed for sharing. My pc.win7 is in a Wifi LAN. When some mobile or tabloid log in, at times it high jack this lower number 192.16.1.6 because they use autoIP. This is show in the ipconfig.

    Is there a way to stop the hijacking.
     
  2. 2016/11/20
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    Who controls (is the admin of) the router? That "admin" needs to assign that fixed IP address to the MAC address of your PC's network card in the router's admin menu. Then, no matter what computer comes and goes, that PC, and only that PC will get that IP address.

    BTW, I suspect it is 192.168.1.6 and not 192.16.1.6.
     
    Bill,
    #2

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  4. 2016/11/20
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    Bill THANK YOU, got your & yes typographical error 168. Kind Regards.
     
  5. 2016/11/20
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    So it works now?
     
    Bill,
    #4
  6. 2016/11/20
    TonyT

    TonyT SuperGeek Staff

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    Set your comp IP to something like 192.168.1.99, far away from auto IP assignments.
     
  7. 2016/11/22
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    Bill, I have not tried your way ie assign fixed IP address to the MAC address of your PC's network card in the router's admin menu.

    I am actually thinking of Tony's idea of setting to 199. So is there a upper limit to the auto IP assignments. If there is, this will work easiest and almost foolproof..

    Thanks guys.
     
  8. 2016/11/23
    TonyT

    TonyT SuperGeek Staff

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    Just set it tp 192.168.1.99.
    Routers will auto assign IP addresses in sequence.
    It is unlikely that it will ever try to assign .99 unless you have 99 devices connected at the same time.
     
  9. 2016/11/23
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    There is a "subnet" limit for home routers that typically is from 192.168.1.0 through 192.168.1.255 for 256 addresses total (though 1 is typically reserved for the router itself).
     
    Bill,
    #8
  10. 2016/11/23
    TonyT

    TonyT SuperGeek Staff

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    Most home routers usually limit DHCP to 50 addresses by defaut. That number can be changed to 254 if needed. Routers also usually have a setting whereby one can set which range of addresses is used for DHCP, e.g. 192.168.1.2-50 or 192.168.1.100-254, etc.

    I always set my routers DHCP to use 192.168.1.100-254 and use 2-100 for static addresses.

    All Class C (the type used by most home routers) IPv4 networks are limited to 254 addresses, the first IP of a network is the network number (usually a router) and the last IP is reserved for Broadcast IP.
     
  11. 2016/11/23
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    DHCP on my Netgear is 192.168.1.2 to 192.168.1.254.

    1.1 is reserved for the router's LAN address.

    I've not seen that 50 address limit before. I don't see it would be there but makers do strange things.
     
  12. 2016/11/23
    TonyT

    TonyT SuperGeek Staff

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    I'll bet there's a setting in the control panel, either the Setup page or DHCP section where the last string of numbers can be changed.
     
  13. 2016/11/23
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    Well, sure. I can limit it if I want. In fact, I have mine set to allow only 10 devices via DHCP, plus my printer which is set by static assignment. But the default was not limited to 50.
     
  14. 2016/11/23
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    Thank you guys the real meaningful sharing. Cheers!

    Some supplier guy just told me that for a TP-link router with 2 huge antenna, we cannot set high numbers eg 192.168.1.188 else it will point to some distant address that may have a similar name when we ping eg ping \\sharedFd. That is it will not point to the set higher number 192.168.1.188
     
  15. 2016/11/23
    Bill

    Bill SuperGeek WindowsBBS Team Member

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    That sounds fishy to me. I would like to see some documentation on that.
     
  16. 2016/11/23
    rsinfo

    rsinfo SuperGeek Alumni

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    That's a new one ! The supplier must mean that the distance increases as you go up the ip addresses. Lol !
    Hope it was true, then we only have to increase the IP address to increase the range of the wifi signal & not bother about anything else.
     
  17. 2016/11/24
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    My reading of this thing is

    I have a number of tabloids with auto ip address. Then when i ping the shared folder it went to another ip address in the WAN.

    So with low number of the shared folder and fix address of the lower range for the the tabloids, it does not go to the distant ip. So the idea is to keep all pcs or tabloids address in the LAN within each other so that the next communication don't go astray.

    I don't know if this make sense.
     
  18. 2016/11/24
    TonyT

    TonyT SuperGeek Staff

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    False data. Communication can go astray is if the IP doesn't exist or if the IP is incorrect. The IP address is a routing number only, it determines WHERE the communication is supposed to go, it does not regulate anything.

    When you change a network computer's IP address, pings to the computer may fail at first because other computers on the LAN do not yet know the IP has changed. It can take several minutes or longer until the changed computer broadcasts its IP change to the LAN.
     
  19. 2016/11/24
    FuzMic

    FuzMic Well-Known Member Thread Starter

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    Tony Thanks for clarifying
     

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