L2TP VPN timeout on android device after 2 minutes

eifelrudi

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)

eifelrudi

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

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

i have done - no change.

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

eifelrudi

PeterUK

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

same values here

PeterUK

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

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