(Removed from selfhost@lemmy.world since it was apparently not related to self host)

Hello, Since 2 weeks I investigate in my whole homelab the cause of an issue. Let me explain it :

I experience slow network speed when accessing my services from outside (outside local network without a VPN to connect directly into it).

Context :

My local network is all in 1Gb, my ISP download and upload speeds are 500Mb each.

Setup :

Since a while I set up a Librespeed server to be able to benchmark speed to my homelab from everywhere. When doing a direct connection from GbE pc to server, I get perfectly 1000Mb (more or less) symmetric speeds.

I was running caddy to reverse proxy it, and basically when connecting trough the domain (therefore trough the proxy) locally I got 980Mb (Surely the overhead that is caused by https and having one more hope).

(And I need to mention that when doing fast[dot]com, speedtest[dot]net or even librespeed[dot]org speedtests I got roughly 500Mb symmetric speeds, my ISP wasn’t lying)

So for now all of it is okay and working as intended.

Issue :

Here comes the problem when doing a speed test to my server (so trough speed.example.com) from a friend computer (who got 450 and 400 Mb on librespeed[dot]org servers), he got around 100Mb download (so homelab upload) and 400Mb up.

Tried other scenarios, from my home (the same where is located the homelab), I connect to the internet trough protonVPN or windscribe (all free tier).

While I was getting around 300-400Mb from librespeed[dot]org servers. I was sometimes getting 7-8Mb from speed.example.com (my libre speed install).

Even when working better I only got something like 80 down and 200 up, better but I was always really lower than popular speedtests or just a bit that could be somehow be margin error (around 40Mb on 400Mb), but was always here, it was not able to get right speeds.

Potential issue with librespeed :

Thinking that librespeed was not working good, so I tried to make a file transfer in file browser service, (Tried going trough and around caddy), getting around 100-110MB per sec without any VPN, going down to 8MB when transferring from the VPN.

Iperf got the same results around 100Mb of transfer speed going from VPN instead of 500Mb.

Maybe this isn’t really clear but I’d be really happy and respectful if someone could help me with this. Feel free to ask questions. :)

EDIT : tried to use nginx but this was even worse as even locally the speeds are not stable at all (not able to have full gigs local speeds) But don’t worry this is an other problem I will maybe resolve later

And little question, does WAN 500/500 speeds means that I can use 500Mb up and down at the same time, or that I can only use 250 each a the same time?