Your L2tp and pptp address range should should be out of the range of each other and outside of the scope of any dhcp or existing fixed IP addresses
The correct ports need to be forwarded to your server if you're behind a NAT device
The correct ports need to be open on any firewall your running
If your connecting via domain name, the domain name has to resolve to your IP address from the Internet
If your connecting via IP address you'll need a fix external IP address
Thanks for the reply -
My routers local address is 10.0.1.1
My server is reserved as 10.0.1.2
My L2TP and PPTP address range is 10.0.1.201-210
My router is an airport extreme and has been configured to forward port 1723 by the server itself.
I am connecting via a static external IP address
Anything else i can try?