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unable to receive incoming data packets

Discussion in 'Networking (Hardware & Software)' started by simon111, 2007/10/15.

  1. 2007/10/15
    simon111

    simon111 Inactive Thread Starter

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    recently i decided it would be a good idea to re formnat my hard drive on my dell dimension desk top computer, wireless networking via a netgear adaptor working well at this point. i reinstalled windows XP professional and all seemed to go well. i also reinstalled my netgear wireless adaptorwithout any problems. However although my computer regularly tells me that it has an excellent connection i can't connect to the internet. According to windows the wireless adaptor is working ok. the icon in the bottom right of the screen with 2 computers, which normally flash alternately, has only one of the computers flashing, when i double click on this icon it apears that hundreds or thousands of outgoing packets have been sent but only 0 or 1 incoming packet received. the wpa psk password is correct, the windows and now macafee firewalls are disabled, the wirelss modem is set to accpet all comers with the correct password. I have exhausted my ideas and was wondering if anybody had any others? Thank you.
     
  2. 2007/10/15
    ReggieB

    ReggieB Inactive Alumni

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    If this was a cable network, I'd suggest checking cables. However, on wireless I think you have to assume that the other systems on the network don't know how to return packets to you. So probably worth checking the basics. If your IP address isn't compatible with your wireless router's IP address, the router won't be able to return packets to you. Have a look at this tool:

    http://www.nicholshayes.co.uk/Node2Node.html

    Enter the IP of your computer as Computer 1, and put the router's IP address in as Computer 2. The masks should be same for both. Then Check the address. You should get no errors. If you get errors it means there is something wrong with the IP address assigned to your PC.
     

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  4. 2007/10/15
    simon111

    simon111 Inactive Thread Starter

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    re. unable to receive incoming data packets

    thanks for the very prompt reply.

    i will follow your suggestion, it may not be for a few days though for work reasons.
    one other detail which i omitted is that when i try to "repair" the connection i am told that it is impossible to renew my ip address and to contact my network administrator or ISP.
    Being a bear of simple mind i find it odd that simply reinstalling windows has resulted in a connection that previously worked malfunctioning now...
     
  5. 2007/10/16
    simon111

    simon111 Inactive Thread Starter

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    incompatible ip addresses, therefore no incoming data packets

    Editted to remove external IP addresses - ReggieB

    i did as suggested and got the following message regarding the ip addresses of the computer which is unable to receive incoming data packets but can send them ok and the router. i couldn't find the subnet mask for the router so input the same one as the computer

    Computer 1
    IP address is 169.254.202.129/255.255.0.0
    Subnet is 169.254.0.0
    Subnet Broadcast address is 169.254.255.255
    Node Number is 0.0.202.129

    Computer 2
    IP address is x.x.6.199/255.255.0.0
    Subnet is x.x.0.0
    Subnet Broadcast address is x.x.255.255
    Node Number is 0.0.6.199

    The computers belong to different subnets. They will only commuicate via a router

    The subnet masks match


    not sure where to go from here....


     
  6. 2007/10/16
    ReggieB

    ReggieB Inactive Alumni

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    Two things that tells me.

    First the less important - the router address you've entered is the external address of the router (I've removed the key unique part of it from your post as it usually best not to post live external addresses). It should have an internal address that probably starts with 192.168. It is the address that appears in the address field of you browser when you connect to the router from a PC inside your network.

    Second - 169.254.202.129 for the PC. Addresses starting with 169.254 are auto-generated by Microsoft Operating Systems when they can't connect to a DHCP server. That is, it tells me that you computer is failing to connect to your network at a fairly fundamental level.

    First check that the SSID of the wireless network you are trying to connect to is correct for your network (you may have miss-typed this or you could even be inadvertently trying to connect to a neighbour's network).

    Are you using the in-built Window system to manage your wireless connection or are you using Netgear software. In general, using the in-built Windows system works best.
     
  7. 2007/10/16
    simon111

    simon111 Inactive Thread Starter

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    unable to recieve incoming data packets

    definately trying to connect to the correct ssid with the correct password. it tells me there is an excellent connection.

    using windows / bthome hub software to connect, trying to figure out how to disbable bt bit

    thanks for removing the unique part of the ip address - its quite obvious i know nothing about this sort of thing!

    i may be slow in replying to any other tips or questions.
    thanks
     
  8. 2007/10/16
    ReggieB

    ReggieB Inactive Alumni

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    Ah! a Brit!

    It could be the BT software. Did they supply a wireless NIC with the hub?

    I've not had a play with one of these units. Unless they've added some bespoke authentication system, I think you should be able to connect to the network without any of the BT software installed. That doesn't help if you've already installed it.

    Have you tried getting support from BT?
     
  9. 2007/10/16
    tuktaktim

    tuktaktim Inactive

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    APIPA address not good

    Computer 1 is receiving an automated IP address. Which computer is connecting wirelessly? I would try hardwiring into the router with the desktop first then accessing the router through the interface, by typing in the ip address of router in a browser address bar. ONce there you can set up security measures for your network and also add the MAC address of your laptop(MAC filtering) so that your network will only allow that connection. If all this is too much, take a look at portforward.com
     
  10. 2007/10/23
    simon111

    simon111 Inactive Thread Starter

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    unable to receive incoming data packets - RESOLVED!

    Thanks for all the advice. I removed the bt software but to no avail. I then had a look at the wireless usb adaptor settings and changed it from "infrastructure" to adhoc settings and that seemed to do the trick.

    I still don't really understand it but all works fine now

    thanks
     
  11. 2007/10/24
    ReggieB

    ReggieB Inactive Alumni

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    I would have thought "infrastructure" should have been the right setting. However, if it's fixed, don't break it. Leave it as it is if it works.
     

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