on 02-11-2018 10:30
Our website www.doccotton.com can not connect with 02 servers. It works via a VPN, on every other mobile network and via wifi but something from 02 stops the connection - it doesnt appear to be the adult filter but may be a DNS issue. Please could you investigate.
Solved! Go to Solution.
on 02-11-2018 10:40
It's Let's Encrypt valid TLS (SSL) certificate. If that was the case half of internet wouldn't work.
DNS entries are fine, couldn't find any technical issues.
Must be some kind of filters/problems O2 has.
Or perhaps they launching similar business and decided to silence the competition
on 03-11-2018 19:52
I'm no expert but on a trace route, when on O2 its getting know where near your server to be a cert issue. I had a similar problem earlier in the year with EE which turned out to be a DNS issue with their servers. One to raise with O2 I'm afraid but it could take time.