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Anyone else seeing UDP throttling on GreenCloudVPS?

Hi all,

I've been trying to optimize a WireGuard VPN tunnel running on one of their VPS boxes and hit a consistent ~360 Mbps wall. Narrowed it down to inbound UDP being capped at the network level on the VPS.

Test setup:

  • Separate VPS on a different network sending 700 Mbps UDP to the GreenCloudVPS box
  • Sender shows 700 Mbps out, 0% loss
  • GreenCloudVPS receiver gets ~415 Mbps with 41% packet loss
  • TCP between the same two servers: no issues, 700+ Mbps both ways
  • Outbound UDP from GreenCloudVPS: also fine at ~700 Mbps

So inbound UDP being dropped, which kills WireGuards UDP throughput. TCP through the tunnel is fine at the same ~360 Mbps ceiling.

I've ruled out:

  • CPU bottleneck (both ends have headroom)
  • Home router/firewall (pfSense, no traffic shaping, tested without firewall)
  • WireGuard config (kernel module, tuned buffers, AVX2 enabled)
  • VPS network cap (TCP gets full speed)

Is this is a known GreenCloudVPS thing or specific to certain locations/plans? What are y'all getting for UDP throughput on their boxes?

Thanks in advance!

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