Site-to-Site VPN is disconnected after Nebula 18.30 is released

Zyxel_Emily

Question:
Why is Site to site VPN disconnected after Nebula 18.30 is released? How to resolve this issue?

Answer:
It is a bug on Nebula 18.30. To resolve this issue, follow the steps to recover Site-to-Site VPN connection.

1. Go to Configure > Firewall > Site-to-Site VPN.
   For Secondary interface, select "None".
   For Nebula VPN, turn OFF "Enabled".
   Click "Save" to save the settings.
   
2. For Nebula VPN, turn ON "Enabled".
   Click "Save" to save the settings.
   
3. Wait for 3-5 minutes. Go to Monitor > Firewall > VPN connections and check "Status" in Site connectivity.