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Simple Network question

Discussion in 'The Pub' started by matty88, Jan 3, 2007.

  1. azkwazere

    azkwazere Ahhh Yes, Ahhh Yes....

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    port isn't forwarded...

    aZk.
     
  2. matty88

    matty88 LPG Installer :p

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    and how do I do that?
     
  3. maxy0987

    maxy0987 New Member

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    You know what, lets try it this way...

    Remove the cable from PC1 and plug it into PC2. Make sure it's the same cable etc, that way you remove that as a point of failure.

    Check to see is windows recognizes the network connection. It'll be in the network connections tab. Create one if needed, it should be able to obtain the IP itself etc, it should just 'know' of the connection.

    Then see if you can ping the router. http://192.168.100.1/ is the link i think for most motorolla modems.

    Then see if you can get net access.
     
  4. maxy0987

    maxy0987 New Member

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    No, shouldnt be an issue, the cable is in the same port as the other one, its a modem, not a router, no port forwarding done
     
  5. azkwazere

    azkwazere Ahhh Yes, Ahhh Yes....

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    POrt forwarding is always done, just not across a network, i really dont get how this this is set up. I need a picture... some one draw me a picture

    aZk.
     
  6. maxy0987

    maxy0987 New Member

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    OK it's like this....

    PC1(office) ----------Modem
    PC2(other)--------------|

    So he wants to remove the cable from PC1 and plug it in PC2 and have it work.

    Yes port forwarding is done but it shouldnt need to be fiddled with (and isnt even an option in the modem)
     
  7. matty88

    matty88 LPG Installer :p

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    Quick pic I drew

    The modem is a Motorola SurfBoard USB Cable Modem SB4100
     

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    Last edited: Jan 3, 2007
  8. azkwazere

    azkwazere Ahhh Yes, Ahhh Yes....

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    X-over cables wont work with ethernet ports on modems, ther cat five standard config cables. Are you 100% sure in the orginal setup thata x-over is used to join the modem to the office PC?

    aZk.
     
  9. maxy0987

    maxy0987 New Member

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    go to your Local Area Connections in the control pannel.

    Go to the connection properties, click on the TCP/IP protocol and in the options in there make sure it's set to 'Obtain IP address automatically'
     
  10. maxy0987

    maxy0987 New Member

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    I thought you needed straight through cables for this also, however he'd see lights ****ing up on his modem if this was the case, im assuming he's checked and it looks fine?


    EDIT: Found your problem chief...
    http://homepage.ntlworld.com/robin.d.h.walker/cmtips/ethernet.html

    You need a straight through cable to go from pc to modem. Not a crossover, if you check your modem lights they should be broken.
     
  11. matty88

    matty88 LPG Installer :p

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    I did that ^^^ previously, will try it tomorrow. I'm fairly certain the cable that joins the modem to the office PC normally is crossover, as we use it to network games between my PC and the family laptop.
     
  12. azkwazere

    azkwazere Ahhh Yes, Ahhh Yes....

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    if he isn't getting pcakets through then that would be my assumption is all.... have a look and both ends of the head and see if the pairs are switched...

    aZk.
     
  13. azkwazere

    azkwazere Ahhh Yes, Ahhh Yes....

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    i could have solved this 20mins ago if someone had of drawn me a pic earlier.

    Simple solution... cut the head off and crimp a standard cat five back on.

    Done.

    aZk.
     
  14. matty88

    matty88 LPG Installer :p

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    could I then set up to like it was (is) now?
     
  15. maxy0987

    maxy0987 New Member

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    um, no you cant.
    You need a straight through cable to go from pc to modem.
    Crossover from PC to PC.

    That's all there is to it, last time you get the pc to work you must've used a different cable or something
     
  16. stocky

    stocky New Member

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    solve all your problems by going wireless
     
  17. matty88

    matty88 LPG Installer :p

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    I rekon Stocky!

    Might buy a router, looking at a Billion brand, very good I hear, {www.billion.com.au}, would it let me share the net at cable speeds as I know the routers are ADSL.
     
  18. stocky

    stocky New Member

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    yeah shouldnt be a problem. cable modem speeds are still very slow compared to the speeds a router can handle
     
  19. dawg

    dawg Member

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    mate, you need a PATCH (STRAIGHT THROUGH) not a CROSSOVER cable when going from modem to pc.

    Crossover (usually red) = PC to PC
    Patch/Straight (usually blue) = Modem/Router/Switch to PC

    Have you fixed the problem yet?
     
  20. matty88

    matty88 LPG Installer :p

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    Nope mate, just gave up lol, but it's annoying me as I have done it before, it must be that Optus have one MAC address assigned per customer, that's the only conclusion I can come up with.
     

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