What changed before the last couple of days? My laptop was frequently dropping WiFi connection- a lot of times in the middle of zoom meetings. We use a router provided by AT&T. My wife complained of the same thing, so I thought I'll ping their customer support.
The customer support person proceeded to tell us they wanted to reconfigure our router to enable "5G". After some bewilderment we realized they were talking about 2.4G vs. 5G WiFi. And they will do it remotely. Ok fine go ahead, we said, and forgot about it.. until I got the call from my office IT security.
Apparently the AT&T support person left our router in passthrough mode. According to their K/B, "Placing a device in passthrough mode will remove firewall protection provided by the AT&T gateway."
I reset my router to default settings, and got myself a 100ft Ethernet cable to fix the issues.