morezh  Freshman Member

Then your firewall has already been accessed and " edited ". Make sure you have a backup of your configuration and restart it from standby firmware. Then you can update it again. (With a bit of bad luck, you will have to reset it and reload the config after the restart to standby firmware).

If you mean the USG20 VPN -> this has been renamed and corresponds to the USG FLEX 50. If you effectively mean the USG 20... it's EOL and EOS for a long time.

With an uptime of more than a year, the firewall will still have an old affected firmware on it. Perform a firmware update

Is USG FLEX 50 the prdouct has been renamed

These legacy firewalls have been EOL or EOS for a long time.

The firmware files at this link can no longer be considered reliable since EVERYONE has the possibility to upload to this share...

Login via Console Router# configure terminal Router#(config) ip dns server cache-flush

Same error on various ATP 200s. Bypass *.sharepoint.com in the URL and DNS Threat Filter exclude and then clear the cache via the Web CLI of the firewall. After that, access works again. (This is only an emergency solution!)

After 14 years of Zyxel and about 8 of them with USGs/ATPs/NXCs as WLAN controllers, it's obvious when exactly 8 APs are online 😉

Do you have enough AP Licenses?