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Broadband router help needed

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  • 19-12-2002 2:38pm
    #1
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭


    Hello. I've just got broadband (from the lovely people at www.irishbroadband.ie) today and am trying to set up a software router.
    At the moment I have 4 computers connected to an ethernet hub - works fine.
    I can't figure out how to connect the broadband modem to it all (the modem has an ethernet connection).
    The broadband works fine when connected directly to one computer, but if i connect it to the hub it dosnt work(even if there is only one other computer connected). Should it?
    Would I have to get a second ethernet card on one of the computers to get it working?


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    #2
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    Do you have to use some sort of software to connect via the modem or is it a router?


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    #3
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    No software needed. I just connect it to the ethernet port and put in the necessary tcp/ip info.


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    #4
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    It should then be just a matter of setting the router's IP as the default gateway on the client machines.
    Can they ping the router etc.?


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    #5
    SkepticOne
    Closed Accounts Posts: 6,718 ✭✭✭SkepticOne


    You will need a router that does NAT (network address translation). One end goes into the IBB modem and the other end goes into hub. If the IBB modem also operates as a NAT router then you won't need a separate router.


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    #6
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    That too, forgot about that :)


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    #7
    SkepticOne
    Closed Accounts Posts: 6,718 ✭✭✭SkepticOne


    You will need a router that does NAT (network address translation). One end goes into the IBB modem and the other end goes into hub. If the IBB modem also operates as a NAT router then you won't need a separate router.

    The alternative (as mentioned) is to put an extra card into one computer and connect it up to the hub.


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    #8
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Should I be able to connect the modem to the hub and connect only one computer to the hub and expect it to work with the same settings as if the computer was connected directly to the modem? it dosn't seem to.


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    #9
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    Can you ping the modem?


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    #10
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    No, I dont think so.
    The modem's ip isnt in my tcp/ip settings, if thats any help...


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    #11
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    Does the modem have a private IP assigned to it?
    What are the TCP/IP settings you're using on the client machine that works?


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    #12
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    I have my IP put in:62.221.16.x
    subnet mask:255.255.255.192
    Gateway (it is called Router on my computer):62.221.16.65
    and two dns server addresses.
    The modem has an address too: 10.100.1.x


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    #13
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    If you only have one public IP address from them (and the router can do nat), you'll need to specify a private IP on each computer in that range and use 10.100.1.x as the gateway.
    Did you get more than one static IP from them?


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    #14
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Yes, only one.

    I think the first step should be to get onw computer working through the hub - without using a softrouter.

    Should I have to change my settings to do that?


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    #15
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    If the router can do nat, give the clients IPs of 10.100.1.10/11/12/13 or whatever you want and give them the IP of the modem as the gateway address, make sure they're on the same subnet.
    Specify the DNS addresses that you have.
    Then see if you can ping the modem/other pcs.
    If you can, try pinging something on the net.
    It's possible the modem isn't going to do nat, so if that's the case you'll need to stick in another network card and then share out the connection via Wingate or something.


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    #16
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Ok, I've got it hooked through the hub to one computer(haven't brought a router into it yet) by using the 'uplink' port on the hub.
    I think I should be able to get it sorted now, it'll ust take a while:)

    Thanks for your help so far.


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    #17
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    but I cheated! :) Got a Belkin hardware router (€84).


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    #18
    Frank Grimes
    Registered Users Posts: 5,338 ✭✭✭Frank Grimes


    Originally posted by Mr. Flibble
    but I cheated! :) Got a Belkin hardware router (€84).

    No NAT on the modem then?


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    #19
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Nope, not as far as I can tell.
    No manual or anything with it - just a little white box.
    All 4 computers are buzzing away happily now :)


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    #20
    Packet
    Registered Users Posts: 188 ✭✭Packet


    The root cause sounds like a straight-through versus cross-over ethernet cable issue.


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    #21
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Is the hub uplink port just a crossedover port? I tried connecting the modem both to it and to the normal port and it didn't help.


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    #22
    SkepticOne
    Closed Accounts Posts: 6,718 ✭✭✭SkepticOne


    Without a the proper router (either within the modem or otherwise), you can't share a single IP across multiple computers because there is no means to direct the incoming packets to the appropriate computers.


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    #23
    Mr. Flibble
    Registered Users Posts: 2,364 ✭✭✭Mr. Flibble


    Thats a bit skepitcal ;)


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    #24
    GUI
    Registered Users Posts: 1,237 ✭✭✭GUI


    dlink 504 router
    very cheap
    it has isdn/adsl modem in 1 as well as 4 port switch and uplink port


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