Overload - ZyWALL USG 50

follet

Hello. I have 2 ISP connections in 192.168.1/24 subnet. Yesterday I faced up with internet trouble. It works unstable, 50-70% of packages were missed. The gateway automatically changed to 192.168.1.10 and I do not have access even to web access for manage settings or see log. After 5 min all works fine, like nothing happened. I was surprised! Successfully I logged in web console and saw temporary overload of CPU in graph.

How to investigate what's impact to this issue?

Screenshot from 2019-09-17 08-27-37.png

Zyxel_Cooldia

Hi @follet

Welcome to Zyel Community. ?

When the CPU goes high, you can check session monitor to see if there is abnormal traffic/large session in Device.

Also, maybe you can find something abnormal event/log in device “Monitor > log”.

 

Session Monitor at “Monitor > System Status”

Log at “System > Log”

Zyxel_Cooldia

Hi @follet

Welcome to Zyel Community. ?

When the CPU goes high, you can check session monitor to see if there is abnormal traffic/large session in Device.

Also, maybe you can find something abnormal event/log in device “Monitor > log”.

 

Session Monitor at “Monitor > System Status”

Log at “System > Log”

follet

Thank you for respond.

In "Session Monitor at “Monitor > System Status”" I see only 50 records, not high load system.

Screenshot from 2019-09-19 09-28-19.png

In the "Log at “System > Log”" screen I see only notice by firewall, i do not see any other records. But firewall activity is too high (maybe) one record per each seconds.

Screenshot from 2019-09-19 09-31-50.png

Now CPU is 5-10% load as normal status, but sometime once a week the overload status can be.

Zyxel_Cooldia

Hi @follet

It seems fine now. You can check those item that we have mentioned previously when the issue happen again.

follet

It is unpredictable event, I'll try when it happens... Thank you!