I am trying to setup a home VPN with IPsec as I have read about PPTP having some security problems and being outdated. I found an article on the web that shows you how to setup an IPsec VPN here which I was able to follow and setup, but when I went to connect to it I could not. I tried port scanning the router from the LAN and by using a computer outside of my LAN and both scans concluded that port 500 (the VPN port) was closed. Is there something else I have to do to set it up to listen so clients can connect? I checked the error logs and everything was clean so I am confused here.
In addition, from what I know IPsec is supposed to be a wrapper around L2TP so am I supposed to setup L2TP first and then configure my IPsec to work with L2TP which would explain why it's not "listening"? If so, could you kindly share a link with me that helps me accomplish that? I've gone though the first couple pages of Google and all I can seem to dig up is PPTP guides. Many thanks!