l2tp/ipsec force client to use pre-sharedkey

[matteo77]

Hi All,

I've configured a L2TP/VPN with a Pre-Shared Key on my PfSense and it works correcty but i noticed that when the client does not provide the shared key he can establish a connection anyway!
My question is: How to force the clients to provide the pre-shared key?
Thank you in advance

[johnpoz]

Your going to have to give us a bit more to go on vs just saying you have setup l2tp/ipsec..

https://www.netgate.com/docs/pfsense/book/l2tp/l2tp-with-ipsec.html

What client are you using?