It will likely just fallback to http on networks like that. Shitty ISPs and corporate networks are why we need fallbacks like that. I would suggest using a VPN

It will likely just fallback to http on networks like that. Shitty ISPs and corporate networks are why we need fallbacks like that. I would suggest using a VPN if you are on such a network. The only downside with HTTP 2 & 3 is software support. If you are in Google, you probably already use it just because the load balancer supports it. With self hosted, you are dependent on whatever you are using adding support. I remember playing with SPDY way back on nginx for example. It wasn't that hard to get going and it made a difference for our mobile users (who are on shitty networks by default). With anything self hosted, security is indeed a key concern; especially if you are using alpha versions of new functionality like this which is what you would be doing effectively.