L2TP VPN timeout on android device after 2 minutes

Options
eifelrudi
eifelrudi Posts: 11
First Comment Fifth Anniversary
image  Freshman Member
edited April 2021 in Security

Hi,

i have configured L2TP VPN over Wizzard - connection from android works fine. i can access the remote devices.

But - after 2 minutes the connection is dropped (disconnected) from Zywall 110.

Firmware: 4.35 (AAAA.2)

image.png


All Replies

  • eifelrudi
    eifelrudi Posts: 11
    First Comment Fifth Anniversary
    image  Freshman Member
    Options

    Hi,

    ich kann die Frage noch besser in Deutsch formulieren ...

    Ich habe l2tp und ipsec-vpn komplett lauffähig mit der Zywall, unter l2tp vom android-tablet bekomme ich aber immer nach 2 Minuten einen Disconnect - siehe Protokoll oben.

    Wie gesagt, l2tp habe ich per Wizzard eingerichtet - und grundsätzlich funktionierts ja, aber mit diesem Disconnect ist natürlich kein Arbeiten möglich.

    IPSec-VPN funktioniert mit verschiedenen (Windows-)Clients einwandfrei.

  • PeterUK
    PeterUK Posts: 4,753
    250 Answers 2500 Comments Friend Collector Ninth Anniversary
    image  Guru Member
    edited February 2020
    Options

    Have you set for the VPN user with lease time to 2mins? As that is a bug that has been fixed in V4.35(AAAA.0)ITS-WK46-r90773 and is not in 4.35 (AAAA.2)

    In L2TP VPN set keep alive timer to 1 second

  • eifelrudi
    eifelrudi Posts: 11
    First Comment Fifth Anniversary
    image  Freshman Member
    Options

    i have done - no change.

    i have tested zwice, 2 minutes after connect zywall disconnects me.

  • eifelrudi
    eifelrudi Posts: 11
    First Comment Fifth Anniversary
    image  Freshman Member
    Options
    image.png


  • PeterUK
    PeterUK Posts: 4,753
    250 Answers 2500 Comments Friend Collector Ninth Anniversary
    image  Guru Member
    edited February 2020
    Options

    What is your Phase 1/2 Setting for SA life time? I have 86400

    Does the ZyWALL 110 have the WAN IP or is their another NAT router?

  • eifelrudi
    eifelrudi Posts: 11
    First Comment Fifth Anniversary
    image  Freshman Member
    Options

    same values here

  • PeterUK
    PeterUK Posts: 4,753
    250 Answers 2500 Comments Friend Collector Ninth Anniversary
    image  Guru Member
    edited February 2020
    Options

    Just changed my ZyWALL 110 to 4.35 (AAAA.2) and no problems connecting my android device by VPN when user lease time set to 1440

  • zyman2008
    zyman2008 Posts: 248
    50 Answers First Comment Friend Collector Ninth Anniversary
    image  Master Member
    Options

    I suggest all to update your firmware to this hot fix ASAP. If you running with 4.35.

    https://businessforum.zyxel.com/discussion/3925/zyxel-security-advisory-for-the-remote-code-execution-vulnerability-of-nas-and-firewall-products


Categories

Security Help Center

EnglishTiếng ViệtРусскийไทย中文（台灣）