SpeedFusion VPN & OSPF: One-Way Traffic Issue

I’m setting up a lab with a Peplink B One 5G and a UniFi EFG. The goal is to use the Peplink for SpeedFusion VPN and bonding, while the UniFi EFG handles advanced packet inspection. Here’s the setup:

The main office has a Peplink B One 5G connected to a UniFi EFG, with OSPF configured between them in Area 0.0.0.1. The EFG’s WAN IP is 192.168.1.2/29, connected to the Peplink’s LAN at 192.168.1.1/29. The main office subnet is 10.0.35.0/24, and a PC on this network has the IP 10.0.35.21.

The remote office has another Peplink B1 connected to the main office Peplink via SpeedFusion VPN. The remote office subnet is 192.168.49.0/24, and there’s a PC on this network with the IP 192.168.49.12.

The problem: The main office PC (10.0.35.21) can ping the remote office PC (192.168.49.12) without issues. But the remote office PC (192.168.49.12) can only ping up to the LAN gateway of the UniFi EFG; it can’t reach the main office PC (10.0.35.21).

For testing, I set a full allow ANY-ANY rule on the UniFi EFG firewall, so this shouldn’t be a firewall issue. OSPF appears to be set up correctly in Area 0.0.0.1, and routes are being shared.

Looking for advice on what might be causing this one-way traffic issue. Is there something specific to OSPF or the UniFi EFG’s handling of return traffic that could be blocking the remote office’s access past the EFG? Any insights would be appreciated.





Update: This was an issue on the Ubiquity site (No suprise). The WAN firewall rules were not allowing the traffic in from the WAN site.

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