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PPTP behind NAT DSL router

Forgive me if this has been asked and answered before.

I have a DSL router with a non-routable IP inside (which is the outside interface of my Astaro FW).  I'd like to be able to terminate PPTP sessions on the ASL box.

On my DSL router, I allow GRE and 1723 through but can only NAT TCP/UDP ports.  So I tell it to NAT all incoming connections for 1723 to the outside interface of my Astaro.

I've set up Masquerading, and rules allowing PPTP and GRE in.  I've added a local user, given it VPN access, and configured the road warrior section.

My live log looks like the following:

pppd 2.4.0 started y (unknown), uid 0
using channel 4
Using interface ppp0
Connect: ppp0  /dev/ttyp0
scan_authfile: found IP address 127.0.0.1
sent [LCP ConfReq id=0x1 ]
LCP: timeout sending Config-Requests
Connection terminated.

Running ASL 2.023.  Trying to connect with Win2k and WinNT4.

Is my problem the DSL router needing to NAT GRE?

TIA Matt

[ 27 March 2002: Message edited by: mlinzbach ]

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