How to Fix The L2TP Connection Attempt Failed Because the Security Layer Encountered a Processing Error on January 18, 2022 July 15, 2022 by Usman Pervaiz 0 An L2TP connection uses the Layer 2 Tunneling Protocol and is used mostly for supporting VPNs. A Virtual Private Network(VPN) is used to mask the origin of connection by reflecting the connection over a server… Read More