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l2tp VPN error from clients w10 with KB4577671 RRS feed

  • Question

  • Hi, i have standart WS 2016 with RRAS roles (all updates is disabled), i use l2pt PSK security VPN connection also with crypto pro + ipsec.

    Generally there is no problems. But last few days i have some new case:

    if client device (win 10) have installed update  KB4577671 i cant connect to my servers

    link to update: https://support.microsoft.com/en-us/help/4577671/windows-10-update-kb4577671

    The full error message is:

    Remote Access error 789 - The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer

    If i delete on clients this update i have no errors. Is it a bug in in KB671 or something else?

    Thanks.

    Tuesday, October 20, 2020 9:49 AM