Yesterday I changed my ISP to one that allows port forwarding. Today the port forwarding has been enabled by the company and I set it up on the router.

After enabling it, my download and upload speed dropped from peaks of 50 MiB/s and valleys of 4-6 MiB/s to a very stable 2 MiB/s. Nothing else has changed in my qBittorrent configuration. If I close the ports again, the speed goes back to normal. I checked if the ports were open on various websites and all of them show that they are forwarded.

I was looking forward to be able to port forward and connect with every possible peer for years, and today has been a big disappointment in that regard!

Has anyone else seen something like this and if so, can you point me to the right direction to fix the problem?

Edit: Thanks everyone for your time and your help! Still working on it, but it's heartwarming to be on the receiving end of the goodwill of this community.

Sometimes I love the internet!

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[–] dividedby0@lemmy.dbzer0.com 1 points 1 day ago (5 children)

The speed test looks fine. Maybe they meter it as you say. Guess I'll have to contact them so they can explain wtf is happening to my connection.

[–] LodeMike@lemmy.today 2 points 1 day ago (4 children)

How did you do the speed test? You need to have an open port on your side and another IP address outside your network.

[–] dividedby0@lemmy.dbzer0.com 2 points 1 day ago (3 children)

Ah, I used the speedtest tool of cloudflare, ookla and openspeedtest. You are referring to https://iperf.fr/, right? When I get home I'll read how to do it properly!

[–] LodeMike@lemmy.today 2 points 1 day ago (1 children)

I am a Unix person I just get it from my distro:s package repository. I don't know if that URL is the correct address.

The steps are (simplified):

Get a server on your home IP (your seedbox will do) and a computer on the outside (you may prefer try a VPN) to stress test your connection.
Open a port to the machine at your house. Run iperf3 server on that port on that machine.
Connect to that machine from the one outside your home via a command which runs a speed test.
See results.

This specifically speedtests incoming connections to your IP address. Regular speedtests like fast.com, etc. Test outgoing. With the way TCP/IP works, your ISP can easily differentiate the two.

[–] dividedby0@lemmy.dbzer0.com 2 points 16 hours ago (1 children)

Man, if this is the simplified version, I'm totally fucked. I understand every word, but the order in which they are stringed together confuses me.

I'm waiting for a call of my ISP's IT service to see what's what. If they can't (or won't) fix my issue, I'll bite the bullet and I'm gonna buy a subscription to a VPN.

Thank you for the detailed explanation!

[–] LodeMike@lemmy.today 1 points 5 hours ago

Its identical ish to what you'd do if you host a website. You can also do that and just try downloading a large file from it (still while outside your network)

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