46

a stupid naive question

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whoareu@lemmy.ca
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piracy@lemmy.dbzer0.com
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Hello,

I am using qbittorrent for torrenting and my ISP has refused to open up firewall because of fucking “security” reasons. however I can still seed the torrent how is that possible? I mean all the incoming connections should be blocked right? isn’t it how firewall works?

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Grippler@feddit.dk
18 points

That sounds weird and super invasive…where is this?

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Baggins [he/him]@lemmy.ca
21 points

They’re probably just using CGNAT.

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Grippler@feddit.dk
9 points

That’s not a firewall though, which is what OP mentions.

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Baggins [he/him]@lemmy.ca
17 points

Does OP really know exactly what technology at his ISP is preventing him from “opening ports”?

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whoareu@lemmy.caOP
8 points

It’s definitely not CGNAT. I have tested it using traceroute.

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bier@lemmy.blahaj.zone
8 points

Ipv4 shortage lead to a lot of IPS adopting CG-NATs where they are sharing one exit IPv4 for multiple end users and that’s why opening a port on the end user side won’t do a thing as your just opening a port in the ISP Network and not to the Internet

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lemmyingly@lemm.ee
2 points

Who says the ISP isn’t blocking ports via a firewall?

I thought it was common practice for ISPs to block certain ports for residential connections?

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cmnybo@discuss.tchncs.de
3 points

They will usually block port 25 so you can’t run a mail server. It’s unusual for an ISP to block everything unless you are on CGNAT.

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