I come from VyOS and really liked it, but still prefer opnsense for the GUI, constant updates and plugins. VyOS started losing appeal once they opted for subscription stable iso access (even if they did give me a free subscription for some comment contribution in their repo). Also, I have to admit, that VyOS needs a fraction of the resources needed by opnsense.

I tried virtualizing Windows on proxmox and it went smooth

I would try this route first.

Here is my logic: it’s the effort to find what you are looking for in a bunch of files and I don’t know how many lines of source code versus the effort to search for some packets (which you should listen for anyway in the final solution) sent from a specific IP address over a relatively small amount of time.

I don’t know from 1903 to 1980 but from 1890 to 1903 they did not fly at all. The first “modern” flight happened in December 1903.

Me also can’t stand the changed control panel UI. Most of the times I just hit WIN+R and type “control”

I am using windows 11 since the preview both for work (dev) and for gaming (although I switched to the steam deck as my main gaming platform) and don’t remember any breaking or blocking bugs. On the contrary, using bluetooth headset got a lot better and easier with win11. Which bugs did you spot?

I am not saying your server is not secure, but just fencing off IMAP from the web is not enough to limit spammers from relaying mail through your server. They usually exploit a misconfigured SMTP server, which does run on port 25 (plain or start TLS mode)