Windows 11 and securextender frequent disconnects

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IanH
IanH Posts: 4 image  Freshman Member
First Comment
in Security
Having major problems with having a stable connection on a Windows 11 pro laptop.  Have disabled wifi and using ethernet only.  Connection disconnecting after 2 minutes almost every time using a BT router, continuous ping which is sub 6ms and a 30+ broadband connection.

Have re-installed client, rebuilt laptop, disabled AV from the Zywall directory, turned off firewall as a test.  Also tried account from a seperate machine which is OK.

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  • Zyxel_Kevin
    Zyxel_Kevin Posts: 988 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 100 Answers 500 Comments
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    Hi @IanH,
    Please kindly find the following FAQ to check if the symptom is the same. 
    https://community.zyxel.com/en/discussion/14013/ssl-vpn-disconnect-due-to-invalid-packet-size#latest
    If the issue still , we can have remote session. 
    Looking forward to your update.
    Thank you
  • IanH
    IanH Posts: 4 image  Freshman Member
    First Comment
    edited October 2022
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    Fantastic, I will give this a try and will report my findings.  Thank you for your assistance. 👍
  • IanH
    IanH Posts: 4 image  Freshman Member
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    The packet size was set to 1374, the issue is the firewall is on an earlier version of firmware 
    V5.30(ABAR.0) / 2022-04-20 01:43:59

    Every time, I try and install the firmware it fails.  I have a workaround of setting up a ping but need to work out how to update.
  • Zyxel_Kevin
    Zyxel_Kevin Posts: 988 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 100 Answers 500 Comments
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    Hi @IanH, 
    We have several SSLVPN issue on 5.30 .
    Did you have any error meassage when the upgrade failed?
    Kevin
  • IanH
    IanH Posts: 4 image  Freshman Member
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    Hi Kevin, no error, showing after the update.  Just the version is not changing from V5.30(ABAR.0) and then next log on, the update appears again.
  • Zyxel_Kevin
    Zyxel_Kevin Posts: 988 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Sales Associate 100 Answers 500 Comments
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    Hi @IanH, 
    Could we have the remote session to check the firmware upgrade issue ?
    We can start at 15:00 (UTC+8). Please kindly provide the remote information and available time via PM.
    Thank you. 

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