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r4ndom81
r4ndom81
Visitor III
March 11, 2024
Question

Disconnects with Windows 11 PC / 5G Router

  • March 11, 2024
  • 14 replies
  • 16606 views

Hi,
i'm using Forticlient VPN  now since approx 1.5 years for work, without any problems.
Usually i connect over a DSL Line with a LAN-Cable connected to my Windows 10 PC.
Sometimes, due to provider problems, i also use a Mobile Data Card, which is operating in a 5G Router. It provides a Wifi net, which my W10 PC connects to and Forticlient also runs smoothly.

Recently, i got a second machine with Windows 11 installed. Over the "normal" house-Wifi everything also works but when i try to use the same 5G Router connection, which is still working on my Windows 10 machine, Forticlient connects and then always immediately disconnects. Tried also to connect the 5G Router with a cable, but same effect...

Maybe someone knows this kind of preoblems and may help. Would appreciate :)

Cheers

    14 replies

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    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    Capture.PNG

    This is what the status says on my Ethernet Controller.

    Another additional information: The 5G Router is now connect via an Cat7 ethernetcable to the PC but it make no difference if connected over cable or Wifi.

     

    AEK
    SuperUser
    AEK
    SuperUser
    April 27, 2024

    - Disabled IPv6 on the Ethernet Adapters Properties (unchecked in the "Networking-list")
    --> Forticlient connects somehow: Bytes are send, the "Fortinet Virtual Ethernet Adapter" gets enabled, no bytes are recieved AND my Internet connection is completly gone on the PC.

    It seems connecting to the remote VPN server (even no traffic passes). You PC loses internet connection probably because all traffic is sent through the tunnel. You can confirm with command "route print".

    Here you need the support of the FortiGate admin so he confirms you are connecting and so he troubleshoots the traffic issue.

    AEK
    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    Hey,
    so do you mean when then IPv6 is disabeled or on default connection? I mean, on my other PC it runs with IPv6 and IPv4 enabled (as said did absolutely nothing in terms of modifing network properties. It always works smoothly since more than 1.5 years), no problem - what is the differnce here, i try to find out?

    And it also means, that i have to contact my companys IT dep. for doing anything on Fortigate? Im just an Enduser with no knowledge of Fortigate or else - just got the client to work remotly (statet that before). Sorry, if i ask possible "dump" questions :D

    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    And i did the route print command in the prompt window, when disbaling IPv6, but the data gives me no clue whats going on, sorry, again, no administrator or specialist :)

    AEK
    SuperUser
    AEK
    SuperUser
    April 27, 2024

    When you type "route print" do you see a default gateway through the tunnel?

    AEK
    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    Ive the results in front of me but where do i find the default gateway info?
    Got an Interface table, a IPv4 Route Table and a IPv6 Route table...

    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    Some thought but maybe its not a thing:

    on my other PC which is working with the 5G Router, the normal Ethernet Adapter is named "Ethernet" (1st device in the list) and the virtual Forticlient Adapters are named "Ethernet 3" and "Ethernet 4"...

    On the non working Mini PC the virtual Forticlient Adpaters are named "Ethernet" and "Ethernet 2" and my normal Adpater is named "Ethernet3". Is this order somehow important?

    r4ndom81
    r4ndom81Author
    Visitor III
    April 27, 2024

    tested different namings/orders now, didnt made any difference :)

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