Hi All,
I'd like to know if there's a definitive list of ports that are blocked by O2 (or more likely, a list of open ports!).
I run a number of online services from home on a hobby basis and have recently set up a Radicale calDAV server running on port 5232. As I'm using NAT, I've chosen port 1984 as my public-facing port, and the arrangement works well when I access it via an internal network address, or using a ZTE MF60 MiFi on the 3UK network. I'm using a Motorola Moto-G and a Nexus 7 (2012).
Only O2 blocks me, and I was wondering if there's any way around this problem?
