help USG20- vpn

baudetd

Hello

I have a problem with a UGS20-VPN router.
and I'm really pissed off...

following an update to 5.36, it reset itself,

I therefore wanted to import the config but this one does not want it, it runs in endless loops.

How can we downgrade?

thanks very much !!!!

PeterUK

Reboot to the other slot firmware

Zyxel_Kevin

Hi @baudetd ,

Greeting Forum,

Did you have serial console cable ? May I have remote session to check the issue today ?

Please kindly provide teamviewer/anydesk if you are available. Thank you

WJS

so device reboot itself endless loop ?

If so, you should not be able to log in the GUI or CLI , you need to fix it it by console cable..

baudetd

hello

Here is what I did to fix the problem:

the router had reset, I accessed the interface via the default ip address.
I downgraded the firmware to 5.35.

then I reinjected my config and it worked.


However, I still have some issues. when I connect to the interface, the cpu quickly rises to 100% and from time to time during the day I no longer have access to the interface and I have small vpn connection problems (because for information, I have 2 vpn to mount on 2 other ugs20)

then I have a "gateway timeout".
as if overloaded

Zyxel_Stanley

Hi @baudetd

ZLD5.36 Patch 2 Firmware has released. This update includes fixes for vulnerabilities, ensuring enhanced protection for your device against potential security risks.

baudetd

are you sure i didn't have problem like the previous version 5.36

Zyxel_Jeff

Hello @baudetd

Because V5.36P2 has CVE fixes for CVE-2023-33009 and CVE-2023-33010 and according to the symptom you mentioned "gateway timeout", we strongly suggest you update to our latest V5.36P2 firmware.

You can follow below steps to update firmware:

Step 1: Disconnect the WAN port connection and reboot your device.

Step 2: Access the device's Web-GUI using the LAN port.

Step 3: Update the firmware to our latest version, V5.36P2.

Thanks.

baudetd

this is my router ,

for update

with file for 1 running and 2 standby ?

Zyxel_James

@baudetd you may upgrade to both partitions. I strongly suggest you backup the configuration file

PeterUK

Are you able to unplug from WAN? If not add a block rule for VPN services to Zywall and reboot then upgrade standby to V5.36P2