I am using a Mac mini OS X Mountain Lion Server (10.8.5). My goal is to have the server's own VPN service running over L2TP only.
The Mac mini is behind an AirPort Extreme (4th generation)
AirPort Extreme has:
static IPv4 address
no connection sharing (bridged mode)
Back To My Macdisabled (as for all the Macs and AirPorts on the network)
Internet connection via Ethernet to my ISP's box
has static public IP address
is the DHCP server with
IP addresses reservations configured for my AirPort Extreme & Mac mini and
private IP addresses from x.x.x.10 up-to x.x.x.50
has NAT/PAT rules for
UDP 500 - ISAKMP/IKE
UDP 4500 - IPsec NAT-Traversal
UDP 1701 - L2TP
Mac mini Server:
has static IP address
is the DNS server for the network
is (of course) the VPN server with the configuration as follows:
public IP address
10 for L2TP
my MacMini private-static IP address+
ISP'Box private IP address+
255.255.255.0(my private network)
NB: My ISP is NOT blocking any ports.
I am aware of the "advanced" guide provided by Apple.
I have been able to access the server when inside my network (-_-)
Trying to connect from 3G network with iPhone 4 gives
"L2TP VPN server did not respond"
Trying to connect from 3G OR other ADSL network with Windows8 gives
"error 789 the L2TP connection attempt failed because the security layer encountered a processing error during initial negociations with the remote computer"
Is this real life?