which ports need to be public for vpn l2tp access through the firewall
I have setup VPN L2TP on my macbook pro, I can access the VPN on my iPad locally just fine. When I try to access it through the internet, externally, I receive the message ( on my iPad) "The L2TP-VPN server did not respond. Try reconnecting. If the problem continues, verify your settings and contact your administrator". I suspect this is due to my router ( apple time capsule ) and its built in firewall. I should be able to put in a rule to allow the ports through. which ports are necessary?
MacBook Air (13-inch Mid 2013), OS X Mavericks (10.9)