New Zealand ADSL Mailing List


RE: Netgear Router and Alcatel STP Modem

From: Fickling, Sam (Sam Fickling) <sam.fickling_at_hp.com>
Date: Mon, 16 Jun 2003 14:17:27 +1200
Message-ID: <2E94204C7720924D8646DFE898B0DBAF02CB4A44@nzmexc01.asiapacific.cpqcorp.net>

>As I remember it the STP supports PPTP (like a Home) - if the Netgear
>support PPTP then the following should work.

> Netgear <-PPTP-> STP <--PPPoA--> RAN

So the STP is capable of becoming a PPTP 'server'? What parameters would I use on either end to set this sort of thing up?

>>So I eventually had to put the Modem into DHCP spoofing mode and everything
>>seemed to work fine.

>This is what I would call bridging, the STP emulates the RAN as an ethernet
>router and bridges to the RAN via PPPoA. The inside nic of the STP will have
>the same IP address as the PPP peer (the RAN), your machine is given the PPP
>client IP address and you route via a default gateway.

Well, I guess the end result is theoretically still the same, but with Spoofing, the Modem is making the layer 2 connection, dialing and making a Layer 3 connection, but with Bridging the modem is basically acting as a protocol translation device (Layer 2) while the router is making the layer 3 connection. Is that correct?

>Your NetGear should have a real world IP address and all incoming
>connections should come through unfiltered by the modem. Why do you say that
>the connections are terminating on the modem?

Well, even though I have opened some external ports on the router on the PAT config page, I can't connect to any services inside. I also can't ping the router's external address from the outside even though I have turned on the 'respond to pings on external interface' option on the router and I can ping the external address from inside the network (not a very good test I know, but all I can do at the moment).

Does anyone know if there is any way to do PPPoA dialing from a PC, or to get the Netgear to do PPPoA dialing?

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Received on Mon Jun 16 14:20:16 2003

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