On Sun, Oct 30, 2022 at 6:36 AM William Goodspeed wrote:
> Hello! I rented a VPS in USA and I'm currently in China. I'm having
> trouble to download files from it and I believe it's caused by the TCP
> congestion control.
>
> When I tried to download files via scp, the download speed started with
> 500K/s and downgrade over time. Approximately 1 min later, the
> download was stalled. What's worst was that I wouldn't able to connect
> to obsd host after stalled (unless wating sometime to make it `forget'
> my connection). I tried on a VPS with GNU/Linux and BBR. That didn't
> happen.
>
> My question is:
>
>1. Is there a way to apply modern congestion control (like BBR) to
> OpenBSD? (From stackoverflow, that's not supported)
>2. If there isn't, how to implement that on OpenBSD? Please point
> out some resources like OpenBSD source code or whatever.
>
> I'm not quite a programming expert but I'm interested in making it
> work. I had a few linux kernel module developing experenice. Maybe I
> can try to implement that on OpenBSD.
>
> I'm looking forward to your reply.
>
> --
>
> William Goodspeed (龚志乐)
> Langfang, Hebei, PRC
Have you tried this with another system? In my experience, the Great
Firewall of China does this type of rate-limiting to any traffic they don't
recognize, and is not necessarily a problem on the OpenBSD side.
