Firewall USG Flex 100 unable to add the device to Nebula Cloud

Mihu · September 2024

Hi, I recently bought a second-hand fireewal USG Flex 100 (firmware V5.39(ABUH.0)). The device does not have a current license. Is it possible that without a valid license you cannot add a device to Nebula Cloud? It is seen as Offline (attachment).

ZTP configuration is impossible, and trying with a USB drive also does not give any results.

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Zyxel_Melen · September 2024

Hi @Mihu,

It is possible to add a device to Nebula without a license. Your device cannot be online because the firmware version doesn't support ZTP mode. Please help to reference this FAQ to find the firmware that supports ZTP and downgrade:

https://community.zyxel.com/en/discussion/21496/nebula-i-cannot-use-native-mode-to-register-and-deploy-my-firewall-on-nebula

Zyxel_Melen · September 2024

Hi @Mihu,

It is possible to add a device to Nebula without a license. Your device cannot be online because the firmware version doesn't support ZTP mode. Please help to reference this FAQ to find the firmware that supports ZTP and downgrade:

https://community.zyxel.com/en/discussion/21496/nebula-i-cannot-use-native-mode-to-register-and-deploy-my-firewall-on-nebula

Firewall USG Flex 100 unable to add the device to Nebula Cloud

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