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UK's O2 network is blocking duckdns.org domains (feddit.uk)

submitted 11 months ago by [email protected] to c/[email protected]

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It too me a while to work out why my Nextcloud stuff wasn't working on my phone. It wasn't until I went to http://duckdns.org on mobile data I saw the block. I had changed ISP from one with IPv6, which I had setup, to an ISP without it, and thought it might be that. But it was just coincidence.

I've written to O2 but I doubt they will change anything, so I'll be changing network.

So heads up UK O2 self hosting people!

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[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

Yer, I used Rethink DNS in F-Droid to test this already. Basically it's fine when the DNS is encrypted.

Edit: I was wrong. It was just working again generally.Even with DoH DNS, I still see "Access denied" going to duckdns.org and my sites still don't work. Direct IP works. Not sure how this block is working yet.