L2Tp Connection Attempt Failed Because The Security Layer
L2Tp Connection Attempt Failed Because The Security Layer . Select ethernet on the left and then click change adapter options on. But mine was set to 'optional encryption' and failing to connect. Unable to connect to L2TP Server from forums.untangle.com I am hoping that this fixing guide would have helped you in some way. After installing kb5009543, ip security (ipsec) connections which contain a vendor id might fail. When trying to connect to the vpn the message the l2tp connection attempt failed because the security layer encountered a processing error is displayed.