China will definitely block xmpp on any port. I know this because I have tested this very specifically from my own server. It lasted about a day and a dozen messages before it was blocked, and the box got absolutely slammed with vulnerability scans.
It also just gets blocked by autocratic firewalls. Deltachat is clutch because it can theoretically run on top of any email host so it’s way more difficult to block.
The protections for classified information are not just about information security. They are about physical and operational security as well. That’s why s SCIF has a “two locks” policy, and requires things like 4" steel doors.
SELinux isn’t really meant to be a user space “utility,” for lack of a better term. It’s meant to be an expert focused security framework for those with the expertise to both understand and implement robust security policies. Your average user daily driving Linux or even running a few self hosted services doesn’t really need complex security policies, and is definitely better served by some simpler tools.
This is 100% meant for his ex wife.
The US produces basically zero coffee. I’m sure there are plenty of snooty boutique roasters in Toronto who do the exact same thing as all the snooty boutique roasters in the US.
Source: have been to Toronto.
Gen Z was a mistake
I can almost guarantee you they are using it through a VPN or they have a western SIM card. If not I’d love to know what server they use, as I’ve tested this a bunch of times on several public and private servers and it’s always the same result. If it isn’t blocked on day 1 it will be blocked quickly.