Suddenly locked out

hahaPfsenseGOBRRR

I configured my network accordingly, it worked yesterday like a charm! So like schedule my server went to bed for several hours and woke up as told (cronjob, wakealarm), so did I and wanted to log in via LAN and im being timeouted. Tried it from the webGUI and a SSH connection. Nothing worked, even from other LAN devices. Yet the internet that flows through the server and thereafter (WAN) to the Router works fine. Even though I havent touched anything since my server went to scheduled sleep mode, the internet works fine and anti-rule for LAN is active (checked as well, there are no blocked IP's as it should be from the LAN side) I cannot explain myself what happened that is causing this. Yesterday I was able to login and configurate everything. I configured following important things (and those were tested as well before the server went off, so before the server worked fine with these configurations!):

Port to 10443
(private) IPv4 address to 192.168.34.[...]
{and thats literally it! nothing more even though I have still a lot to do, but since it was already late I couldn't do much more..}

I wasn't able to install Snort or anything else than just shellcmd for the Qemu Guest Agent (-->Proxmox, pfsense is installed as VM), didn't have time to configurate the Firewall, just the bare minimum had been done effectively.
Since I'm a total networking-noob and thereafter not having a single clue what went wrong over the schedule, I ask for help. Please be as explicit as possible with explanations, instructions or questions so that we can avoid communication issues :)
{
Btw. I came at least that far to figure out some possible fixes, spoiler: They didn't work:

--> Using a different device connected to the LAN
--> Pinging from LAN as well as WAN devices (no reaction, 100% data pack loss, the internet connections flowing through LAN all work fine, they all pass through pfsense and after that are redirected to the router
--> restarting everything
}
Thanks!

stephenw10

So what was shut down here, the Proxmox server? Not just the VM?

Does pfSense respond at the virtual console?

Does it show the expected IPs there?

Are you sure your traffic from LAN side clients is actually going through pfSense? Does it stop if you shut down the pfSense VM again?

Steve