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Can't connect 2 computers to Internet

By Norak ยท 12 replies
Apr 18, 2006
  1. Hey, I was wondering if any of you guys would be able to help me. I'm having a bit of trouble with either my modem or my computer, I don't know which.

    My Problem: I can't connect two computers to my internet (broadband).

    Modem: D-Link DSL-302G
    ISP: Optus
    Computer 1:
    AMD Athlon 64 3000+
    512 mb RAM
    Windows XP Pro
    120 gb HDD
    On-Board 10/100 mb Ethernet port
    Radeon 9550 256mb Graphics Card
    Computer 2:
    AMD Athlon 64 3200+
    512 mb RAM
    Windows XP Pro
    80 gb HDD
    On-Board 100/1000 mb ethernet port
    On-board graphics card
  2. Nodsu

    Nodsu TS Rookie Posts: 5,452   +6

    "Can't connect" means what? The plugs don't fit? :p

    What exactly do you want to do?

    By the looks of it, you should be attempting to connect the modem to one of the computers via USB and then use Windows ICS and a crossover cable to hook up the second.

    If you had other ideas, then you either didn't tell us about something or it just plain can't work.
  3. Peddant

    Peddant TS Rookie Posts: 1,403

  4. Daveskater

    Daveskater Banned Posts: 1,412

    we have a d-link dsl router too, quite possibly the hardest thing i have ever had to set up, and we still get problems where it randomly stops working.
    anyway, back to the point.
    make sure that the router (i'm assuing it's a router) is set up for your internet connection and says that it is connected in the status page
    if it's not a router then it'll probably be quite similar but i don't know :p
    yeah, so make sure that it is set up properly and i hope that helps :knock:
  5. Norak

    Norak TS Rookie Topic Starter

    I am only using a modem that has two ports - One USB and one Ethernet. I have connected one computer using the ethernet, and one using the USB. When one computer is connected, the other can't access the internet. It is really annoying.
  6. Samstoned

    Samstoned TechSpot Paladin Posts: 1,009

    you can't use the other if you use the usb and visa versa
    don't use the usb only work for 1 connection
    here's how to start
    use the rj45 jack connection to 1 machine get another nic card and run crossover cable to 2nd machine
    so 1st machines has 2 nic's in it 2nd has 1 nic if the one has no nic gonna have to buy another for that one
    they will both be able to surf at same time the config for doing this is not easy
    if you are running home it's worse than pro.
    the eayer way is get a router have it connect to the to via netowrk rj45's
    remove the modem connection software and config the router with your isp's user info
    get a nice little linksys or some such cheap as chips they are

    foot note
    I don't think ICS can use the usb as it make its own virtual nic and ICS need phisical nics to make a virtual one is that not right or is that for bridging
  7. kevinant

    kevinant TS Rookie

    Well you don't really need all these complicated materials... I use D-Link DSL-302G as well... you can connect with USB and ethernet simultaneously and surfing internet on both computer... But, there is one thing you have to be aware of! The USB should be connected before the ethernet. If you do not follow that order it won't work.
  8. jobeard

    jobeard TS Ambassador Posts: 12,485   +1,428

    humbug! Every user's guide I've seen for modems with both USB and Ethernet
    explicitly say one or the other but not both!

    the usual approach is either
    OR better
    modem---router---systemsA+B on the lan side
    the latter has the benefit of allowing either system to be powered off and the
    other still has access, which is NOT true with ICS.
  9. kevinant

    kevinant TS Rookie

    mmm that's sounds really weird to me... I can really use this modern to connect two computers to the internet using both Ethernet and USB. I even successfully created an intranet network using that....
  10. Ph30nIX

    Ph30nIX TS Rookie Posts: 232

    Kevinant is correct, that modem should allow two computers to be used. They upgraded it to the 502g which is effectively the same modem. ICS is just for of a pain in the *** especially when the modem supports two pcs.
  11. Daveskater

    Daveskater Banned Posts: 1,412

    Hello, kevinant, and welcome to Techspot :wave:

    Please take a look at the following threads to make your experience here as enjoyable as possible :)

    Message for all newcomers

    SNGX1275's Guide to making a good post/thread

    The Techspot FAQ

    If you could take a minute to fill in some of your profile information that would be helpful to all members of the forum :)
    Knowing someone's location in the world can be extremely helpful, even if you just put a country.

    Also remember to post any problems or questions that you have in the appropriate forums

    It's good to see that everyone's helping out but this thread dates back to April '06 :blush:

    Reading my original reply was a bit of a blast from the past :D
  12. technicalfury42

    technicalfury42 Banned Posts: 62

    Chances are, if you have multiple allocated IPs, both connections would work on the modem, but if you have only 1 IP from your ISP, one or the other would work, because there would be a DHCP lease problem.

    You can use a computer as a router, but the simplest ways are:

    1) Buy a real hardware router
    2) Get a second IP from your ISP and use a switch or let the modem behave as a switch.
  13. jobeard

    jobeard TS Ambassador Posts: 12,485   +1,428

    Yes, this is exactly the issue. Usually we get a single IP address from the ISP
    and attempting to connect two pcs via the modem creates an IP address conflict, hence the need for the router.
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