Revision as of 14:00, 3 February 2017 (view source) AA-Andrew (talk \| contribs) m (→‎Setting up OpenL2TP) ← Older edit		Latest revision as of 00:04, 18 August 2018 (view source) Reedy (talk \| contribs) (clean up)
__NOTOC__<indicator name="L2TP">[[File:Menu-L2TP-Relay.svg\|link=:Category:~~L2TP_Handover~~L2TP Handover\|30px\|Back up to the L2TP Handover page]]</indicator> ==Setting up OpenL2TP== The OpenL2TP [http://www.openl2tp.org/downloads download page] offers version 1.8, which compiles straight out of the tarball. This is the configuration I'm ~~using -- with~~using—with my IP addresses and tunnel secret removed, naturally! If you don't want tunnel authentication, leave out the 'secret=' and 'auth_mode=' lines. peer profile create profile_name=a.gormless ===Musings=== PPP over GPRS connections is a bit, well, weird. The PPP connection that pppd on your laptop establishes is not all the way through to your LNS as you might expect. It isn't even terminated in the mobile ~~network -- it~~network—it's actually terminated on the modem. What this means is that the username and password you give to pppd are verified by the ~~modem -- which~~modem—which just accepts anything you supply. The proxy authentication username that the LAC presents is a UK 07xxx phone number. It also presents a CHAP authentication ID, challenge and response. These are ignored unless you enable allow_ppp_proxy. The 'calling number' and 'called number' in the incoming call request are the SIM's ICCID. [[~~Mobile_IPv6~~Mobile IPv6\|IPv6]] ===Things to do=== Work out how to identify individual SIMs and supply the correct IP address to each one. If you set 'auth_none' to 'no' in the ppp profile then PPP forces the other end to ~~authenticate -- this~~authenticate—this is separate from the PPP proxy authentication although it uses the same username and secret. The username is currently a telephone number (447...) so I think I can use that. I've got this working, in as much as it allows entries in the LNS's chap-secrets to contain IP addresses and the correct one is passed to the modem. However (at least on pppd 2.4.5 with openl2tp 1.8) I haven't found a way to set the IP address on the LNS's end of the link. If you use the '-- local:remote' syntax in chap-secrets it picks up the remote IP but not the local one.

OpenL2TP (view source)

Revision as of 00:04, 18 August 2018