SecuExtender randomly disconnecting from USG110

kyssling

Hello, we have a problem with a VPN connection via SecuExtender to the USG110 router.

The connection is disconnected from time to time and must be reconnected.
This is a completely random behavior, sometimes not disconnected for a whole day, sometimes more times a day in
various places , computers and internet.

I really tried almost everything I thought and left a ton of time ...
IPv6 shutdown, fixed IP for LTE modem - (even during the day the provider changed the IP address),
no sleep mode, latest drivers, updates, latest FirmWare for routers etc.

I spent two days at a branch, and the problem happened once.
My colleague was connected without any problems at the same time (so I would exclude a problem on the Internet at the branch office
and headquarters where USG110 is)

Disconnection in SecuExtender.log:

[2018/08/13 12:03:46] [SecuExtender Helper] Request (100): REMOVE 1795270848/1241578064 21 179742912 29927616
[2018/08/13 12:03:46] [SecuExtender Helper] Remove Routing
[2018/08/13 12:03:46] [SecuExtender Helper] Remove prioritize routing
[2018/08/13 12:03:46] [SecuExtender Helper] Succeed to delete prioritize route to 80.250.0.74
[2018/08/13 12:03:46] [SecuExtender Helper] Failed to read from client (2): 109, 0
[2018/08/13 12:03:46] [SecuExtender Helper] Start to Disconnect pipe ...
[2018/08/13 12:03:46] [SecuExtender Helper] Shutting down a pipe connection instance ...
[2018/08/13 12:03:46] [SecuExtender Helper] ==============================

and in the log on the Zyxel router:
2018-08-13 12:03:48, A.B.C.D, E.F.G.H, info, SSL tunnel has been disconnected
2018-08-13 12:03:48,,, debug, user, User, Set SSL VPN for user: VPN_Kysely src=160.218.116.179 LhFiYFCf4YACuO9V1mBpYARcqtpcMblbvHlagQdDT0IsrZajEbvDrWXh3ehsrPXX tunnel=0.0.0.0
2018-08-13 12:03:48,,, info, ssl-vpn, Account: VPN_Kysely, network extention has been accessed. sent=11375343 rcvd=176814057

(A.B.C.D. E.F.G.H changed)

If anyone would like to help with the problem (or someone has the same problem), I would like to provide complete logs
and I hear proposals for solutions.

Simple remark : On USG we have disabled session limit, latest FW 4.32(AAPH.0), service in Policy Control - only RDP and Ping.

Thank you! Václav

Zyxel_Stanley

Hi @kyssling

This log mentioned mainly about normal VPN connect/disconnect related information.

I will send you private message for checking this issue more detail.

kyssling