VPN Setup – Not Working

[JerryZ]

I am having a basic problem with VPN on a Simple Server home install.
Here are my basics:

My Server is Behind an existing Gateway/Router and sits on the Network

1) Setup Router
ï router lan address = 192.168.1.1
ï subnet mask = 255.255.255.0
ï dhcp on
ï dhcp server starts at = 192.168.1.9
ï dhcp server ends at = 192.168.1.200
ï dns server (opendns servers) = 208.67.222.222, 208.67.220.220

I used this setup for VPN
Setup Server Preferences
ï open server preferences
ï go to file sharing: turn on file sharing
ï go to vpn: turn on vpn
shared secret = somethingsecretive
ip address range = 192.168.1.101 – 192.168.1.199
ï go to users
ï make new user(s) with all options enabled

vpn type = L2TP over IPSec

When I attempt to connect with wireless or ethernet, I get a failed to connect error.

May 2 10:23:56 macbook-pro-15 pppd[4210]: L2TP connecting to server ‘xxxx.dyndns.org’ (24.2.xxx.xx)…
May 2 10:23:59 macbook-pro-15 pppd[4210]: IPSec connection started
May 2 10:24:09 macbook-pro-15 pppd[4210]: IPSec connection failed

I’ve Got Dyndns working, and it appears the other services, File Sharing, Wiki, etc.

Ideally, I would like to use this VPN connection when I am away from home to get email & browse securely.

[JerryZ]

Additional info from the log

5/2/08 8:09:06 PM pppd[3130] pppd 2.4.2 (Apple version 314) started by root, uid 501
5/2/08 8:09:07 PM pppd[3130] L2TP connecting to server ‘xxxxxxxxx.dyndns.org’ (xx.x.xxx.90)…

5/2/08 8:09:08 PM com.apple.launchd[108] (com.seagate.notificationexec.plist) Throttling respawn: Will start in 10 seconds
5/2/08 8:09:10 PM pppd[3130] IPSec connection started

5/2/08 8:09:11 PM pppd[3130] IPSec connection established

5/2/08 8:09:11 PM pppd[3130] L2TP connection established.
5/2/08 8:09:11 PM pppd[3130] Connect: ppp0 <--> socket[34:18]
5/2/08 8:09:12 PM pppd[3130] MS-CHAP authentication failed:
5/2/08 8:09:12 PM pppd[3130] Connection terminated.
5/2/08 8:09:12 PM pppd[3130] L2TP disconnecting…

5/2/08 8:09:12 PM pppd[3130] L2TP disconnected

[JerryZ]

I resolved this issue with port forwarding the Server VPN ports on my AEBS –
udp: 500, 4500; udp/tcp: 50

This allowed me to get the VPN working.

[Author]

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