Discussion: AT&T blocks the IOF website

I am unable to connect to the IOF website. I have AT&T mobile service and AT&T U-verse internet and wifi. No device connects, either at home or away. AT&T tech support admitted last night that IOF is blocked because of viruses and malware, but that I could pay $15 per month to utilize their special proxy server, whatever that is.
Does anyone else have this issue?

Just tried from my AT&T phone... and it is in fact unavailable directly. I can get there via an anonymizing proxy.

I have not been able to access the site from any of my devices for over 2 months now. AT&T also. I switch browsers and nothing. Tablet, phone, PC. All are blocked.

I have an older I-phone with AT&T service. Linked to the IOF orienteering.org website just fine. Browsed a couple of their pages, left the site, and came back again, all with no problems.

https version has problems with certificate, but http works fine for me.

https version has problems with certificate

Yikes, orienteering.org is hosted on a 5€/month shared host?