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Ludovic_D · May 23

No patch for USG 20 and USG 20W ?

ZdenekB · May 23

ZYWALL 1100 - erno : -42008, ermsg : Firmware not compatible ! I try upload file : 473AAAA1ITS-23WK21-r109592.bin

morezh · May 24

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.

lion_perm · May 24

Trying to update FLEX50 (USG20-VPN) via web, USB

Zyxel_Stanley · May 24

ZLD4.73 & 5.36 Patch 2 Firmware has been officially released.
This new version also includes a fix for the identical issue.

lion_perm · May 25

Didn't work

Zyxel_James · May 26

Please refer to this article and try again

Zyxel_James · May 29

@Akran Go to Configure > Firmware Management > Firewall, select Upgrade Now as the Upgrade policy, and click Save.

The upload file 473AAAAxxxxx.bin is for ZyWall 110. For ZyWall 1100, you can find the filename is 473AAACxxxxx.bin

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