Have you been able to get PPTP working? For me neither work. I get the following errors for PPTP on the server:
Sun Sep 4 10:24:43 2011 : DSAuth plugin: Could not authenticate key agent for encryption key retrieval.
Sun Sep 4 10:24:43 2011 : sent [CHAP Success id=0xa9 "S=55299EAA89204494CACFF6D5BC5EFD1123090965 M=Access granted"]
Sun Sep 4 10:24:43 2011 : CHAP peer authentication succeeded for edljedi
Sun Sep 4 10:24:43 2011 : DSAccessControl plugin: User 'edljedi' authorized for access
Sun Sep 4 10:24:43 2011 : MPPE required, but keys are not available. Possible plugin problem?
Sun Sep 4 10:24:43 2011 : sent [LCP TermReq id=0x2 "MPPE required but not available"]
Sun Sep 4 10:24:43 2011 : Connection terminated.
and the following errors on the laptop:
9/4/11 8:24:39.055 AM pppd: pppd 2.4.2 (Apple version 560.13) started by edljedi, uid 502
9/4/11 8:24:39.452 AM pppd: PPTP connecting to server 'delariviere.net' (68.15.133.50)...
9/4/11 8:24:39.992 AM pppd: PPTP connection established.
9/4/11 8:24:40.278 AM pppd: Connect: ppp0 <--> socket[34:17]
9/4/11 8:24:40.000 AM kernel: PPTP domain init
9/4/11 8:24:43.345 AM pppd: PPTP error when reading socket : EOF
9/4/11 8:24:43.345 AM pppd: PPTP error when reading header : read -1, expected 12 bytes
9/4/11 8:24:43.350 AM pppd: Connection terminated.
9/4/11 8:24:43.384 AM pppd: PPTP disconnecting...
9/4/11 8:24:43.388 AM pppd: PPTP disconnected
I have tried all the various solutions for this one to no avail. I would much prefer to get L2TP working but at this point I would settle for at least one.
I'm pretty sure it's a server problem since I have tried to connect with a Mac OS X 10.7 system, my iPhone and WinXP. All fail. I had tried simplifying my shared key on L2TP to no avail as someone else had suggested. If I could figure out what is supposed to happen after the SCCRP step (what the connecting machine is supposed to send back, maybe I can figure out why it is not).
On my server I get the same errors as you. On my laptop I get:
9/4/11 8:31:53.854 AM pppd: L2TP connecting to server 'server.net' (68.133.xx.xx)...
9/4/11 8:31:53.863 AM pppd: IPSec connection started
9/4/11 8:31:54.029 AM racoon: Connecting.
9/4/11 8:31:54.029 AM racoon: IPSec Phase1 started (Initiated by me).
9/4/11 8:31:54.030 AM racoon: IKE Packet: transmit success. (Initiator, Main-Mode message 1).
9/4/11 8:31:54.181 AM racoon: IKE Packet: receive success. (Initiator, Main-Mode message 2).
9/4/11 8:31:54.201 AM racoon: IKE Packet: transmit success. (Initiator, Main-Mode message 3).
9/4/11 8:31:54.339 AM racoon: IKE Packet: receive success. (Initiator, Main-Mode message 4).
9/4/11 8:31:54.346 AM racoon: IKE Packet: transmit success. (Initiator, Main-Mode message 5).
9/4/11 8:31:54.473 AM racoon: IKEv1 Phase1 AUTH: success. (Initiator, Main-Mode Message 6).
9/4/11 8:31:54.473 AM racoon: IKE Packet: receive success. (Initiator, Main-Mode message 6).
9/4/11 8:31:54.473 AM racoon: IKEv1 Phase1 Initiator: success. (Initiator, Main-Mode).
9/4/11 8:31:54.473 AM racoon: IPSec Phase1 established (Initiated by me).
9/4/11 8:31:55.475 AM racoon: IPSec Phase2 started (Initiated by me).
9/4/11 8:31:55.477 AM racoon: IKE Packet: transmit success. (Initiator, Quick-Mode message 1).
9/4/11 8:31:55.613 AM racoon: IKE Packet: receive success. (Initiator, Quick-Mode message 2).
9/4/11 8:31:55.614 AM racoon: IKE Packet: transmit success. (Initiator, Quick-Mode message 3).
9/4/11 8:31:55.615 AM racoon: IKEv1 Phase2 Initiator: success. (Initiator, Quick-Mode).
9/4/11 8:31:55.615 AM racoon: IPSec Phase2 established (Initiated by me).
9/4/11 8:31:55.615 AM pppd: IPSec connection established
9/4/11 8:32:15.616 AM pppd: L2TP cannot connect to the server
9/4/11 8:32:15.681 AM racoon: IKE Packet: transmit success. (Information message).
9/4/11 8:32:15.681 AM racoon: IKEv1 Information-Notice: transmit success. (Delete IPSEC-SA).
9/4/11 8:32:15.684 AM racoon: IKE Packet: transmit success. (Information message).
9/4/11 8:32:15.684 AM racoon: IKEv1 Information-Notice: transmit success. (Delete ISAKMP-SA).
Based on the timestamps, something is expected to be happening between the 31 min 55 second mark and the 32 min 15 second mark when it hangs up. The fun part is the server keeps saying "here's an IP, how bout this one, or this one":
2011-09-04 10:31:55 EDT Incoming call... Address given to client = 192.168.x.140
Sun Sep 4 10:31:55 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:31:55 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:31:55 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:31:55 2011 : L2TP received SCCRQ
Sun Sep 4 10:31:55 2011 : L2TP sent SCCRP
2011-09-04 10:31:56 EDT Incoming call... Address given to client = 192.168.x.141
Sun Sep 4 10:31:56 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:31:56 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:31:56 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:31:56 2011 : L2TP received SCCRQ
Sun Sep 4 10:31:56 2011 : L2TP sent SCCRP
2011-09-04 10:31:58 EDT Incoming call... Address given to client = 192.168.x.142
Sun Sep 4 10:31:58 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:31:58 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:31:58 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:31:58 2011 : L2TP received SCCRQ
Sun Sep 4 10:31:58 2011 : L2TP sent SCCRP
2011-09-04 10:32:06 EDT Incoming call... Address given to client = 192.168.x.128
Sun Sep 4 10:32:06 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:32:06 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:32:06 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:32:06 2011 : L2TP received SCCRQ
Sun Sep 4 10:32:06 2011 : L2TP sent SCCRP
2011-09-04 10:32:10 EDT Incoming call... Address given to client = 192.168.x.129
Sun Sep 4 10:32:10 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:32:10 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:32:10 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:32:10 2011 : L2TP received SCCRQ
Sun Sep 4 10:32:10 2011 : L2TP sent SCCRP
2011-09-04 10:32:14 EDT Incoming call... Address given to client = 192.168.x.130
Sun Sep 4 10:32:14 2011 : Directory Services Authentication plugin initialized
Sun Sep 4 10:32:14 2011 : Directory Services Authorization plugin initialized
Sun Sep 4 10:32:14 2011 : L2TP incoming call in progress from '72.254.xx.xx'...
Sun Sep 4 10:32:14 2011 : L2TP received SCCRQ
Sun Sep 4 10:32:14 2011 : L2TP sent SCCRP
2011-09-04 10:32:15 EDT --> Client with address = 192.168.x.140 has hungup
2011-09-04 10:32:16 EDT --> Client with address = 192.168.x.141 has hungup
2011-09-04 10:32:18 EDT --> Client with address = 192.168.x.142 has hungup
2011-09-04 10:32:22 EDT --> Client with address = 192.168.x.143 has hungup
2011-09-04 10:32:26 EDT --> Client with address = 192.168.x.128 has hungup
2011-09-04 10:32:30 EDT --> Client with address = 192.168.x.129 has hungup
2011-09-04 10:32:34 EDT --> Client with address = 192.168.x.130 has hungup