Firmware V5.36(ABWD.0) issues

Agor76

Hi team,

we're facing stability issues once upgraded to new firmware V5.36(ABWD.0) on a couple of USG FLEX 700. The firewalls suddenly became unresponsive, no response from https gui and ssh, switching off the power is the only remaining option.
Both firewalls have been upgraded from few hours and this issue happened for two times. Do I have to reverto to the previous release which is V5.35(ABWD.0) ? We had no problem with it

Regards

Agor

USG_User

We've updated our USG Flex 700 to 5.36 on yesterday and didn't experience any problems until now.

Agor76

Unfortunatly, we had to perform a downgrade of our FLEX 700s to the previous release (V5.35), manual reboot needed every 2-3 hours.
Now, we're a little bit concerned about the security issue which affects the firmware 5.35, could somebody from Zyxel please help ?

Agor

Zyxel_Cooldia

Hi @Agor76 ,

Can you send me diag-info in PM for analysis.

noc_aba

Hello

after upgrde to V.5.36 we have exactly the same issue, as Agor, on a couple of ATP800 in HA.

After about 3-4 hours the active ATP800 becomes unresponsive (not even vpn or ssh access) and the only solution is to reboot manually, compelled to be phisically there to do that.

Europe zyxel support claims they have not heard about this problem. Strange, isn't it ?

best regards

Paolo

Agor76

https://community.zyxel.com/en/discussion/comment/51419#Comment_51419

Hi Zyxel_Cooldia,

we have been forced to downgrade to the previuos firmware version (V.5.35) due to the stability issue. I'm in an office with more than 200 employees and working using a firewall that crashes every 3-4 hours was merely impossible. The previous version works fine, never had a problem so far.

But I guess that you're asking for the diag-info from the affected firmware which is v.5.36 isn't it ?
Should I collect those diag-info once rebooted after the crash ?

Regards

Agor

rbc

I had the same issue as Agor and Paolo. I upgraded yesterday to firmware 5.36 on an ATP800 and ATP500. Today both routers disconnected all the remote workers. Interestingly enough, onsite users were still able to use the internet while the remote workers were disconnected.

I could not log in to the management page until I manually rebooted the routers. Then remote workers could connect for a few hours. Then the same issue.

Tech support said they haven't heard of this issue and suggested that I downgrade the routers to 5.35.

After 6 hours on the old firmware, I haven't seen the same issue. I think it's a firmware bug. Maybe a memory leak?

PeterUK

Hmmm my VPN300 and FLEX200 seem fine on V5.36

Agor76

Having remote workers connected seems to make the issue worse. I'm saying this because I also manage some Flex 200 and 500 having no issue on V5.36 but no one is remotely connected.

Flex700 with remote workers connected crashes after few hours on v5.36. No issue on v5.35. It's definitely a firmware problem.

As I wrote before, we have been forced to downgrade the routers to 5.35 and they're fine now, but I'm feeling a little bit concerned due to the security issues bounded to 5.35. Hope that Zyxel will help soon

Regards

Elgen07

Hi

After upgrading my USG FLEX 100 to 5.36, ports 5 and 6 didn't come back up, but last night port 6 came back up after 28 hours. There are measuring instruments without OS that are connected to the ports. Could it have any reason?

Datamail

We have te same exactly issue, but te problem itself begun on patch 5.35, and we did the update thinking that was a firmware problem and the issue was not solved.

we have also bought a new flex 500, but same result, excluding then an hardware defect.

we have opened a support ticket , but up to now, no solution