Solved: iPhone and Mac do not connect to Synology L2TP/IPSec VPN: The L2TP-VPN server did not respond

Error message: „The L2TP-VPN server did not respond. Try reconnecting. If the problem continues, verify your settings and contact your Administrator.“


Go to Synology and open the VPN server. Open the settings menu for L2TP/IPSec VPN.

Remove the checkmark from “Enable SHA2-256 compatible mode (96 bit)”.