Mac OS X L2TP VPN won't connect
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Ah, I figured it out --- the "Shared Secret" "Machine Authentication" password was invalid. I reset it, and now it connects properly on all machines.
(Too bad the error message was totally incorrect. Hopefully someone else will find this before spending hours troubleshooting it... :^/ )
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Author by
Danica
Updated on September 17, 2022Comments
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Danica almost 2 years
I'm running Mac OS X Server 10.6, providing an L2TP VPN service. The VPN works just fine when connecting from all computers except one --- this one computer stays at the "Connecting..." stage for a while, then says "The L2TP-VPN server did not respond".
In the console, I see this:
6/7/10 10:48:07 AM pppd[341] pppd 2.4.2 (Apple version 412.0.10) started by jdoe, uid 503 6/7/10 10:48:07 AM pppd[341] L2TP connecting to server 'foo.bar.baz.edu' (256.256.256.256)... 6/7/10 10:48:07 AM pppd[341] IPSec connection started 6/7/10 10:48:07 AM racoon[342] Connecting. 6/7/10 10:48:07 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 1). 6/7/10 10:48:08 AM racoon[342] IKE Packet: receive success. (Initiator, Main-Mode message 2). 6/7/10 10:48:08 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 3). 6/7/10 10:48:08 AM racoon[342] IKE Packet: receive success. (Initiator, Main-Mode message 4). 6/7/10 10:48:08 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 5). 6/7/10 10:48:11 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit). 6/7/10 10:48:14 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit). 6/7/10 10:48:17 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit).
...and the "retransmit" messages continue until the error message pops up.
So far I've unsuccessfully tried:
- rebooting
- deleting the VPN profile and recreating it
- verifying the client's internet connection (it is able to reach the VPN server)
- connecting through several different networks (in case a router was blocking VPN packets)
- disabling the Mac OS X Firewall on the client
- making sure that the VPN settings exactly match those of other working computers
- running software update (the client is on 10.6.3)
Any ideas?