L2TP connecting but not assigning IP

bavaria
bavaria Posts: 30  Freshman Member
First Comment Fifth Anniversary
edited April 2021 in Security

Hi,

I have an USG 110 with the newest firmware and I setup a L2TP VPN.

I have following problem, two laptops (both Microsoft Surface) are working perfectly with the VPN.

But with all other Windows 10 (1909), I have a problem. Within the Zyxel VPN monitor I can see that this PC's can connect. But they don't get an IP address.

And after a short time the PC's disconnect and get different errors, mostly 718 or 829.

I also tried the NAT regedit hint, but it doesn't work.


Do you have an idea?

Accepted Solution

  • bavaria
    bavaria Posts: 30  Freshman Member
    First Comment Fifth Anniversary
    Answer ✓
    Hello Zyxel_Jerry,


    sorry for the late answer, 
    I configured the vpn as you mentioned, but I had the problem that it cannot connect on some W10 machines.
    I setup now IKEv2 with a certificate and it works on all machines from beginning.
    Thanks.

All Replies

  • Zyxel_Jerry
    Zyxel_Jerry Posts: 1,283  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 50 Answers 1000 Comments

    Hi @bavaria

    Can you share the VPN settings (VPN connection and VPN gateway) on USG110 ?

    PHASE1 &2-red.png
    l2tp-red.png

    What is the L2TP settings on Win10?

    win10 l2tp settings.png

    Do you have any AD authentication?

    Untitled Image

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  • bavaria
    bavaria Posts: 30  Freshman Member
    First Comment Fifth Anniversary
    Answer ✓
    Hello Zyxel_Jerry,


    sorry for the late answer, 
    I configured the vpn as you mentioned, but I had the problem that it cannot connect on some W10 machines.
    I setup now IKEv2 with a certificate and it works on all machines from beginning.
    Thanks.
  • bavaria
    bavaria Posts: 30  Freshman Member
    First Comment Fifth Anniversary
    Hello Zyxel_Jerry,


    sorry for the late answer, 
    I configured the vpn as you mentioned, but I had the problem that it can't connect on some W10 machines.
    I setup now IKEv2 with a certificate and it works from beginning.
    Thanks.
  • bavaria
    bavaria Posts: 30  Freshman Member
    First Comment Fifth Anniversary
    Hello Zyxel_Jerry,


    sorry for the late answer, 
    I configured the vpn as you mentioned, but I had the problem that it can't connect on some W10 machines.
    I setup now IKEv2 with a certificate and it works from beginning.
    Thanks.

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