Website not accessible on 02 network

[DocCotton]

Hi,

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. 

Thanks,

[liggerz87]

Yep a problem I just tried on o2 4g didn't work either it could be a site certificate that could be a probpem

[Martin_CN]

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 

[dgilbert2]

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.

[DocCotton]

Thanks for the help, much appreciated.  Any idea on a who to contact at 02? Hard to find contact details for a technical issue like this.

[Cleoriff · Accepted solution]

@DocCotton

If you ring customer services you then need to ask to speak to someone from the IT section

https://www.o2.co.uk/contactus