Why access point keep blinking orange/green and not connecting to Nebula

Zyxel_HsinBo

If your Zyxel access point (AP) is blinking Orange/Green slowly (1-second interval), it means the AP is trying to connect to the Nebula Cloud but has failed to establish a stable connection. This issue is usually related to local network configuration or internet connectivity.

Troubleshooting Steps

1. Check if the AP Obtained a Local IP Address and firewall configuration

• If the AP does not have a private IP address:
  Verify that your router, DHCP server, and Ethernet cabling are working properly.
• If the AP does have a private IP address:
  Ensure your firewall is not blocking the required Nebula management ports:
  • TCP 4335
  • TCP 6667

2. Verify DNS Settings

To avoid DNS resolution issues, configure the AP or network to use a reliable public DNS server, such as:

• 8.8.8.8
• 8.8.4.4

3. Check Physical Connectivity

If the problem continues:

• Inspect the Ethernet cable quality.
• Check the uplink switch/router for instability.
• Replace the cable or change ports if needed.

Still Having Issues?

If the AP remains offline after completing the steps above:

• Review this guide for more help: How to check the Cloud Control Status when AP is offline on Nebula? — Zyxel Community
• Contact Zyxel Support with additional details or diagnostics files.