Slow routing of OPENVPN & Wireguard traffic through UCG Ultra - Fritzbox brings full speed

VPN
1

My Gateway Ultra, is single core bottlenecked by special traffic and I don’t understand why. I use my Fritzbox in Bridge Mode, which works fine. On my PC und normal conditions I get full Gigabit, but only 500 Mbit with VPN on. Checking HTOP of the Gateway Ultra one Core is at 100% if it needs to route VPN traffic which I thought would just be UDP traffic. If I disable the VPN and run test again speed is Gigabit again and the cores are evenly at 75%. Connection my PC directly to Fritzbox I get full Gigabit with and without VPN (always same VPN Server and same target server, testet multiple times)

Why does my Unifi Device struggle to route VPN traffic (UDP basicly) but non VPN Traffic (which is also udp I guess, as speedtests are mostly udp connections) are not? Does someone know if the Gateway Max can handle more? Is there a setting I need to set in the console? I disabled Intrusion detection, and Device and traffic identification.

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Wouldn’t begin to comment on VPN throughput configurations but that screencap shows no performance concern. Load average means much more in *nix based systems and your system seems relatively idle.