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 3 points 23 hours ago* (last edited 23 hours ago) (13 children)

I'm completely sure! Yesterday it was running ok all day. Today, I port forwarded and left home for a couple hours, after coming home I checked the computer and saw the low speed. The first thing I did was think about what had changed and I closed the ports. The speed went up immediately. I tested it a couple more times with different ports and the same thing happened.

[–] LodeMike@lemmy.today 2 points 23 hours ago (12 children)

What the fuck?

Maybe they meter incoming speed? Try running a speedtest using a web server or iperf3 or something.

[–] _cryptagion@anarchist.nexus 8 points 22 hours ago (8 children)

more likely they just know it's bittorrent traffic. that's not hard for an ISP to sniff out, if you aren't using a VPN. it's not uncommon for ISPs to throttle bittorrent traffic automatically.

[–] cassandrafatigue@lemmy.dbzer0.com 3 points 12 hours ago (1 children)

And the reasons they do it run the gamut from 'mildly shitty' to 'profoundly shitty'.

You might consider routing torrent traffic through multiple old garbage laptops on your network, then putting your regular traffic through on an 'unforwarded' looking computer at full speed? Might work.

[–] dividedby0@lemmy.dbzer0.com 1 points 11 hours ago (1 children)

I'll look into it, but I don't think this is something I would be capable of doing. Would a couple of raspberrys work?

[–] cassandrafatigue@lemmy.dbzer0.com 2 points 10 hours ago (1 children)

Yeah but ancient secondhand laptops are about the same price, come with storage, and you're taking ewaste out of circulation.

[–] dividedby0@lemmy.dbzer0.com 2 points 10 hours ago (1 children)

That's a great point!

[–] cassandrafatigue@lemmy.dbzer0.com 2 points 9 hours ago

Reduce, reuse, recycle, steal shit!

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