Hi all,
I’m hoping to get some guidance on a site-to-site VPN setup I’m working on between a Peplink B One and a UniFi Cloud Gateway Ultra (UCG-Ultra).
Current state:
- I have an IPsec VPN established between the two devices
- The tunnel shows as connected/healthy on both sides
- However, I am not getting any routing between the LANs on either side
What I’ve checked so far:
- Local and remote subnets appear to be defined correctly on both ends
- Firewall rules don’t seem to be explicitly blocking traffic
- NAT settings look reasonable (but I could be missing something subtle)
Where I’m unsure:
- Is IPsec still the best approach for this type of setup between Peplink and UniFi gear?
- Would something like another VPN type (OpenVPN, WireGuard, etc.) be more reliable or easier to configure in 2026?
- Are there any known quirks between Peplink and UniFi when it comes to IPsec routing?
What I’m looking for:
- Common things to check when the tunnel is up but no traffic passes
- Recommended configuration patterns for this specific combination of hardware
- Any tutorials, guides, or example configs that walk through Peplink ↔ UniFi VPN setups
If anyone has this working (especially with a B One and UCG-Ultra), I’d really appreciate any pointers or even screenshots of key settings.
Thanks in advance for any help!