USG 110 kernel UDP_CONNECTION_ERROR_UNKNOWN

prif · May 2019

Hello.
Sometimes my usg 110 unreachable.
I can not ping it and web interface is not working.
It`s longs from 15 second to some minutes.
Today I saw this error in debug log in time when USG was stuck.
kernel: <0>[ConnTrack_UDP(2301)]: UDP_CONNECTION_ERROR_UNKNOWN
What this error means?

PS I have the latest firmware installed.

Zyxel_Stanley · May 2019

Hi @prif

What firmware version is working on your USG110?

Does your PC behind USG when you testing ICMP and WebGUI? When issue occurring, can PC access to internet?

Can you connect console cable between PC and USG110 to collect level8 logs by terminal tool until the symptom happen again?

Change console log level: Router> debug kernel console-level 8 (default is 1)

prif · May 2019

Firmware version is 4.33(AAAA.0)
Yes, my PC is behind USG. There is no internet access.

I will try with console cable.

prif · May 2019

Yesterday my USG was self-rebooted.
Console log before reboot is in attachment.
And in debug log there is error while booting about conntrack:
kernel: nf_conntrack: automatic helper assignment is deprecated and it will be removed soon. Use the iptables CT target to attach helpers instead.

Zyxel_Stanley · June 2019

Hi @prif
Can you send your configuration by private message for further check?

USG 110 kernel UDP_CONNECTION_ERROR_UNKNOWN

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