You aren’t a moron at all. If you haven’t been exposed to it I wouldn’t expect you to know what it is.

So virtualization is kind of like taking multiple computer operating systems and running them on one physical server. So instead of needing a physical server for each system, you can run dozens. Then you can have clusters of physical machines that are running hundreds of virtual machines (computers) per cluster.

As a virtualization engineer, I work with VMware products (Now owned by Broadcom) to design and implement virtual infrastructure. This allows organizations to run multiple virtual machines on fewer physical servers, which enhances scalability and simplifies backup and recovery processes. Think of it as creating a digital version of a computer that can be easily adjusted and moved around.

Virtualization Engineer. Finally doing what I am passionate about. I was a stock broker 10 years ago. It was a crazy ride.

So I’m not sure if this is the problem affecting your friend, however, RCS messaging uses additional ports rather than just the standard tcp/443 port to send traffic. This port is specifically tcp/5223. If your friend connects to a wireless network that has a firewall that doesn’t have the port open, then the RCS messages will fail to send/receive until they are either connected to their cellular network or a wireless network that doesn’t have that port blocked.

The catch is, if you try to send a message while you are on a network where the traffic isn’t allowed, the RCS message doesn’t attempt to resend right away after changing to a network where the traffic is allowed.

I have a firewall in my house that has very strict rules and I had to enable a firewall policy to allow this traffic to be able to send / receive RCS messages when I was connected to my home’s WiFi. My wife’s company WIFi network has that port blocked so she doesn’t connect to it anymore and RCS works just fine.

If you want to see if this is the case for your friend’s phone, have them use their mobile network while sending / receiving RCS messages to test.

No it has not. Validated on Ubuntu 16.04, 18.04, 20.04, 22.04 running CrowdStrike Sensor

Windows Server OSes running CrowdStrike affected too