[pptp-server] Using PoPToP in conjunction with L2TP and a PPP concentrator

Tim Wilfong tim.wilfong at aubeta.net
Mon Apr 23 21:13:26 CDT 2001


Has anyone tried using PoPToP to terminate the PPP session somewhere other
than
the server that that PoPToP is running on. i.e. It is feasible to take the
PPP
session and send it out an L2TP tunnel to an PPP concentrator, so that the
user 
that is using PPTP to "dial-in" looks just like users dialing into that
dial-up 
server. Has anyone tried experimenting with this? It seeems that PoPToP
already
sends the PPP sessions to a seperate PPP daemon to handle the termination of
the
PPP session, so it would be a matter of modifying an L2TP (or PPPoE, for
that 
matter) client to take these sessions and tunnel them to a PPP concentrator.

If this could be set up, then a Linux server running PoPToP could be used as
a tunnel switcher to allow legacy PPTP clients to access an L2TP-based VPN 
server, thus allowing easier migration to an L2TP-based VPN solution. (Of
course, 
there are many security implications from this, but let's ignore those for
now.)

-- Tim Wilfong



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