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bizarre ADSL Modem and router conflict.

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  • 28-09-2003 11:46am
    #1
    Boston
    Closed Accounts Posts: 17,163 ✭✭✭✭


    I'm tryign to connect my linsys 8 port router/switch (BEFSR81) to my newly acquired Netgear Single port adsl modem router (DM602) Right i connect them all up, the router see the modem, connects to the internet, gets an ip address and all that, yet i can't actually browse the net. It say website found and then nothing. I tried every type of cable i had, in case i wasn't connecting it right (cat 5 cross over between router an modem) nothing helped) the really bizarre thing though is that for some reason i can access MSN and Google but no other sites. Both of them have nat firewall protecting and i was wonderign if this might be the cause.


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    #2
    spongebob
    Closed Accounts Posts: 6,143 ✭✭✭spongebob


    dubble nat is the problem , NAT/fw on the router only and let it straight thru the modem. the return ports are probably fecked up royally in your config.

    M


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    #3
    Boston
    Closed Accounts Posts: 17,163 ✭✭✭✭Boston


    hmm nat forward, you mean like port forward? thing is i can set the modem/ router as jsut a modem, i would have thought this would fix things but it didn.t


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    #4
    Rew
    Moderators, Sports Moderators Posts: 8,679 Mod ✭✭✭✭Rew


    Originally posted by Muck
    dubble nat is the problem , NAT/fw on the router only and let it straight thru the modem. the return ports are probably fecked up royally in your config.

    M

    Double NATing is fine there is a guy here on a wireless lan who is being routed once and NAT'd 3 times. NATing and routing are essentially the sdame thing with a bit of messin here and thwere with headers. It only casuses a problem if u want to come back the other way.

    Your right though in the situation abouve there is no reason for double NATing


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    #5
    spongebob
    Closed Accounts Posts: 6,143 ✭✭✭spongebob


    maybe set internal address of modem to 192,168.0.1 and the router to 192.168.0.2 , tell machines behind router that the router is the gateway and tell the router to route via 192.168.0.1 to all destinations.

    but its late

    g'night!


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    #6
    MadKevo
    Closed Accounts Posts: 191 ✭✭MadKevo


    To clarify, are you already doing the following:

    1. Netgear Single port adsl modem router (DM602) configured in bridging mode only (bridged ethernet or RFC1483 or whatever the newer RFC is); vpi8/vci35/llc-snap, with no routing, NA(P)T or anything turned on. Perhaps an IP address to manage it though... *

    2. linsys 8 port router/switch (BEFSR81) configured as router (!) with PPPoE credentials entered here, DHCP set up for required range (different to network used in *) and an IP address on the linksys for management

    That should be it, but I think you've done all that already...
    Ensure latest firmware installed on both devices, see manufacturers' websites for more.

    HTH,
    /MK.


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