I'm about to do the same and was gathering the necessary information yesterday. The best thread I found was this one: http://marc.info/?l=openbsd-misc&m=138836875831549&w=1
The article on Undeadly http://undeadly.org/cgi?action=article&sid=20120427125048 is outdated. I've not been able to find a clear write up on the web of a complete working configuration for making a L2TP / IPsec VPN connection to an OpenBSD machine with an iPhone. I'll give it a go with what I found but if anyone who has it working with local authentication can post their ipsec.conf and npppd.conf, I would appreciate it! Daniel ==== Original message from Gordon Turner at 21-7-2014 2:35 > Hey List, > > I am trying to use OpenBSD 5.5 as an VPN end point for iOS 7.0 and OSX > 10.9 native VPN clients, using L2TP / IPsec.
