Why can't I set a WAN interface to 0.0.0.0 on ATP/USG FLEX firewall?

Zyxel_Emily

Question:
Why can't I set a WAN interface to 0.0.0.0 on ATP/USG FLEX firewall? I encountered an issue while setting PPPoE on an USG FLEX firewall. I tried to configure the WAN interface with IP: 0.0.0.0 and mask: 0.0.0.0. However, the setting appeared problematic.

Answer:
The issue will be resolved in the next official version 5.41. If you encounter this issue, follow these steps to resolve it:

If you need an immediate workaround before upgrading:
Access the CLI and enter the following commands:
Router(config)# interface <interface_name>
Router(config-if-ge)# ip address 0.0.0.0 0.0.0.0
Router(config-if-ge)# exit
Router(config)# write