Mysterious behaviour - remote access via hack? system log and ports listed - please help

I am using leap 15.5 and i’m behind a router with firewall.
I had a text file in kate opened and opened multiple tv recording files via vlc but was connected to the internet. I was shortly not in the room for a few minutes. After I came back the same video was still opened in vlc (in the front) but two lines of the txt file were deleted and the focus was different then before (like someone scrolled a few sites below). No other person was in my room in that time. The system protocol of that time is below.

what is quite interesting is that “net activiy viewer” ( a tool like netstat -a) listed me
on tcp and tcp6 2 local ports as State “LISTEN”: 631/ipp and 25/smtp (so 4 connections) and I don’t know why. I am using the computer as a desktop and not as a server. This seems to me new and I don’t know where it comes from. Maybe from a installation but it doesn’t make sense for me. I didn’t have these TCP ports in LISTEN one or two weeks ago. I also checked the list of running services but seems to be ok (no email smtp or whatever).
And the net activity viewer lists the following:

> **protocol|state|local port|remote port | program |command| remote host | remote address | PID**
>tcp 	LISTEN 	631 ipp 	* 	 	 	. 	* 	
>tcp 	LISTEN 	25 smtp 	* 	 	 	. 	* 	
>tcp6 	LISTEN 	631 ipp 	* 	 	 	. 	* 	
>tcp6 	LISTEN 	25 smtp 	* 	 	 	. 	* 	
>udp 	 	43571 	* 	 	 	. 	* 	
>udp 	 	323 	* 	 	 	. 	* 	
>udp 	 	5353 mdns 	* 	 	 	. 	* 	
>udp6 	 	36368 	* 	 	 	. 	* 	
>udp6 	 	323 	* 	 	 	. 	* 	
>udp6 	 	5353 mdns 	* 	 	 	. 	* 	

Below is a quote of yast center - miscellaneous - “Display the system’s log (/var/log/messages)” and it prints out the /var/log/message (because there are 2 other options). Is there something suspicious? Is it a typical log? Why are there at “2025-01-04T23:35” so much network activities/logs? Because that is arount the time I was not in the room. The last messages could be that I shut the computer down.
Also interesting is the following: “2025-01-04T23:36:20.499588+01:00 systemd[1]: Stopping Session 3 of User …” why session 3 ?

I am a experienced desktop user but with not that much knowledge about linux. And I didn’t read the message (/var/log/message) log at this detail level before.
Or are there any leap 15.5 exploits out there because it isn’t supported anymore?

2025-01-04T23:22:33.916159+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.kscreen/contents/ui/InhibitionHint.qml:27:5: QML Label: Binding loop detected for property "verticalAlignment"
2025-01-04T23:22:33.927338+01:00 <computername> kded5[1844]: Service  ":1.404" unregistered
2025-01-04T23:22:33.947076+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/items/PlasmoidItem.qml:125: TypeError: Cannot read property 'compactRepresentationItem' of null
2025-01-04T23:22:45.961513+01:00 <computername> systemd[1709]: Started VLC Media Player - Medienwiedergabe.
2025-01-04T23:22:45.996189+01:00 <computername> plasmashell[32291]: [00005597f33725d0] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
2025-01-04T23:22:46.225709+01:00 <computername> kded5[1844]: Registering ":1.408/StatusNotifierItem" to system tray
[removed vlc message]
2025-01-04T23:24:12.767296+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.kscreen/contents/ui/InhibitionHint.qml:27:5: QML Label: Binding loop detected for property "verticalAlignment"
2025-01-04T23:24:14.723035+01:00 <computername> plasmashell[1922]: kf.service.services: KApplicationTrader: mimeType "x-scheme-handler/file" not found
2025-01-04T23:24:14.744508+01:00 <computername> systemd[1709]: Started Kate - Erweiterter Texteditor.
2025-01-04T23:24:15.263717+01:00 <computername> kate[32342]: kf.service.services: The desktop entry file "/home/<user>/.local/share/applications/IzPack Online Documentation.desktop" has Type= "Link" instead of "Application" or "Service"
2025-01-04T23:24:15.263794+01:00 <computername> kate[32342]: kf.service.sycoca: Invalid Service :  "/home/<user>/.local/share/applications/IzPack Online Documentation.desktop"
2025-01-04T23:24:49.459043+01:00 <computername> plasmashell[1922]: kf.service.services: KApplicationTrader: mimeType "x-scheme-handler/file" not found
2025-01-04T23:24:49.472153+01:00 <computername> systemd[1709]: Started Dolphin - Dateiverwaltung.
2025-01-04T23:26:57.557011+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.kscreen/contents/ui/InhibitionHint.qml:27:5: QML Label: Binding loop detected for property "verticalAlignment"
2025-01-04T23:34:43.572760+01:00 <computername> plasmashell[32291]: [h264 @ 0x7f7b9400b5a0] get_buffer() failed
2025-01-04T23:34:43.572981+01:00 <computername> plasmashell[32291]: [h264 @ 0x7f7b9400b5a0] thread_get_buffer() failed
2025-01-04T23:34:43.573071+01:00 <computername> plasmashell[32291]: [h264 @ 0x7f7b9400b5a0] decode_slice_header error
2025-01-04T23:34:43.573150+01:00 <computername> plasmashell[32291]: [h264 @ 0x7f7b9400b5a0] no frame!
2025-01-04T23:34:43.578981+01:00 <computername> plasmashell[32291]: [00005597f3408630] main playlist: end of playlist, exiting
2025-01-04T23:34:43.632483+01:00 <computername> kded5[1844]: Service  ":1.408" unregistered
2025-01-04T23:34:43.654446+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/items/PlasmoidItem.qml:125: TypeError: Cannot read property 'compactRepresentationItem' of null
2025-01-04T23:35:10.108455+01:00 <computername> plasmashell[1922]: file:///usr/lib64/qt5/qml/org/kde/plasma/extras/PlaceholderMessage.qml:238:5: QML Heading: Binding loop detected for property "verticalAlignment"
2025-01-04T23:35:14.521288+01:00 <computername> plasmashell[1922]: kf.service.services: KApplicationTrader: mimeType "x-scheme-handler/file" not found
2025-01-04T23:35:14.550166+01:00 <computername> systemd[1709]: Started Net Activity Viewer.
2025-01-04T23:35:14.693408+01:00 <computername> plasmashell[1922]: QQmlVMEMetaObject: Internal error - attempted to evaluate a function in an invalid context
2025-01-04T23:35:14.693494+01:00 <computername> plasmashell[1922]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/main.qml:401: TypeError: Type error
2025-01-04T23:35:47.835225+01:00 <computername> kded5[1844]: org.kde.plasma.nm.kded: Unhandled active connection state change:  3
2025-01-04T23:35:47.837562+01:00 <computername> dbus-daemon[828]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.6' (uid=0 pid=957 comm="/usr/sbin/NetworkManager --no-daemon ")
2025-01-04T23:35:47.839435+01:00 <computername> dbus-daemon[828]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.45' (uid=1001 pid=1922 comm="/usr/bin/plasmashell --no-respawn ")
2025-01-04T23:35:47.840446+01:00 <computername> systemd[1]: Starting Network Manager Script Dispatcher Service...
2025-01-04T23:35:47.843311+01:00 <computername> systemd[1]: Starting PackageKit Daemon...
2025-01-04T23:35:47.846096+01:00 <computername> dbus-daemon[828]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
2025-01-04T23:35:47.846348+01:00 <computername> systemd[1]: Started Network Manager Script Dispatcher Service.
2025-01-04T23:35:47.847617+01:00 <computername> PackageKit: daemon start
2025-01-04T23:35:47.847920+01:00 <computername> avahi-daemon[827]: Withdrawing address record for <ipv6 adress> on eth0.
2025-01-04T23:35:47.847968+01:00 <computername> avahi-daemon[827]: Withdrawing address record for <ipv6 adress> on eth0.
2025-01-04T23:35:47.848011+01:00 <computername> avahi-daemon[827]: Leaving mDNS multicast group on interface eth0.IPv6 with <ipv6 adress>.
2025-01-04T23:35:47.849078+01:00 <computername> avahi-daemon[827]: Joining mDNS multicast group on interface eth0.IPv6 with address <ipv6 adress>.
2025-01-04T23:35:47.849394+01:00 <computername> avahi-daemon[827]: Registering new address record for <ipv6 adress> on eth0.*.
2025-01-04T23:35:47.849477+01:00 <computername> avahi-daemon[827]: Withdrawing address record for <ipv6 adress> on eth0.
2025-01-04T23:35:47.849561+01:00 <computername> avahi-daemon[827]: Leaving mDNS multicast group on interface eth0.IPv6 with address <ipv6 adress>.
2025-01-04T23:35:47.849637+01:00 <computername> avahi-daemon[827]: Interface eth0.IPv6 no longer relevant for mDNS.
2025-01-04T23:35:47.905701+01:00 <computername> avahi-daemon[827]: Files changed, reloading.
2025-01-04T23:35:47.905777+01:00 <computername> avahi-daemon[827]: No service file found in /etc/avahi/services.
2025-01-04T23:35:48.001032+01:00 <computername> avahi-daemon[827]: Withdrawing address record for <ipv4 adress> on eth0.
2025-01-04T23:35:48.001097+01:00 <computername> avahi-daemon[827]: Leaving mDNS multicast group on interface eth0.IPv4 with address <ipv4 adress>.
2025-01-04T23:35:48.001129+01:00 <computername> avahi-daemon[827]: Interface eth0.IPv4 no longer relevant for mDNS.
2025-01-04T23:35:48.027503+01:00 <computername> dbus-daemon[828]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.6' (uid=0 pid=957 comm="/usr/sbin/NetworkManager --no-daemon ")
2025-01-04T23:35:48.030887+01:00 <computername> systemd[1]: Starting Hostname Service...
2025-01-04T23:35:48.034213+01:00 <computername> chronyd[990]: Can't synchronise: no selectable sources
2025-01-04T23:35:48.034292+01:00 <computername> chronyd[990]: Source <ipv4 adress> offline
2025-01-04T23:35:48.045817+01:00 <computername> dbus-daemon[828]: [system] Successfully activated service 'org.freedesktop.PackageKit'
2025-01-04T23:35:48.045897+01:00 <computername> systemd[1]: Started PackageKit Daemon.
2025-01-04T23:35:48.047915+01:00 <computername> dns-dnsmasq.sh[32599]: <debug> NETWORKMANAGER_DNS_FORWARDER is not set to "dnsmasq" in /etc/sysconfig/network/config -> exit
2025-01-04T23:35:48.050320+01:00 <computername> plasmashell[1922]: Could not find the Plasmoid for Plasma::FrameSvgItem(0x55e201582720) QQmlContext(0x55e200fe7390) QUrl("file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml")
2025-01-04T23:35:48.050397+01:00 <computername> plasmashell[1922]: Could not find the Plasmoid for Plasma::FrameSvgItem(0x55e201582720) QQmlContext(0x55e200fe7390) QUrl("file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml")
2025-01-04T23:35:48.060768+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net mobile: false
2025-01-04T23:35:48.060853+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net online: false
2025-01-04T23:35:48.060985+01:00 <computername> plasmashell[1922]: message repeated 4 times: [ plasma-pk-updates: Is net online: false]
2025-01-04T23:35:48.061015+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Daemon changed
2025-01-04T23:35:48.061046+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net mobile: false
2025-01-04T23:35:48.061081+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net online: false
2025-01-04T23:35:48.061204+01:00 <computername> plasmashell[1922]: message repeated 4 times: [ plasma-pk-updates: Is net online: false]
2025-01-04T23:35:48.061234+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Daemon changed
2025-01-04T23:35:48.064927+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net mobile: false
2025-01-04T23:35:48.065005+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Is net online: false
2025-01-04T23:35:48.065376+01:00 <computername> plasmashell[1922]: message repeated 4 times: [ plasma-pk-updates: Is net online: false]
2025-01-04T23:35:48.065591+01:00 <computername> plasmashell[1922]: plasma-pk-updates: Daemon changed
2025-01-04T23:35:48.069542+01:00 <computername> dns-dnsmasq.sh[32620]: <debug> NETWORKMANAGER_DNS_FORWARDER is not set to "dnsmasq" in /etc/sysconfig/network/config -> exit
2025-01-04T23:35:48.130334+01:00 <computername> dbus-daemon[828]: [system] Successfully activated service 'org.freedesktop.hostname1'
2025-01-04T23:35:48.132125+01:00 <computername> nscd: 856 überwache Datei »/etc/nsswitch.conf« (8)
2025-01-04T23:35:48.132177+01:00 <computername> systemd[1]: Started Hostname Service.
2025-01-04T23:35:48.132224+01:00 <computername> nscd: 856 überwache das Verzeichnis »/etc« (2)
2025-01-04T23:35:48.132378+01:00 <computername> systemd-hostnamed[32590]: Hostname set to <localhost.localdomain> (transient)
2025-01-04T23:35:48.132410+01:00 <computername> nscd: 856 überwache Datei »/etc/resolv.conf« (5)
2025-01-04T23:35:48.132434+01:00 <computername> nscd: 856 überwache das Verzeichnis »/etc« (2)
2025-01-04T23:35:48.146240+01:00 <computername> dns-dnsmasq.sh[32635]: <debug> NETWORKMANAGER_DNS_FORWARDER is not set to "dnsmasq" in /etc/sysconfig/network/config -> exit
2025-01-04T23:35:52.243249+01:00 <computername> plasmashell[1922]: file:///usr/lib64/qt5/qml/org/kde/plasma/extras/PlaceholderMessage.qml:238:5: QML Heading: Binding loop detected for property "verticalAlignment"
2025-01-04T23:35:58.164827+01:00 <computername> systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
2025-01-04T23:35:59.264540+01:00 <computername> systemd[1709]: Started VLC Media Player - Medienwiedergabe.
2025-01-04T23:35:59.315311+01:00 <computername> plasmashell[32641]: [00005588624c85d0] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
[vlc message removed]
2025-01-04T23:36:07.937069+01:00 <computername> PackageKit: daemon quit
2025-01-04T23:36:07.953956+01:00 <computername> systemd[1]: packagekit.service: Deactivated successfully.
2025-01-04T23:36:14.146249+01:00 <computername> plasmashell[1922]: file:///usr/lib64/qt5/qml/org/kde/plasma/extras/PlaceholderMessage.qml:238:5: QML Heading: Binding loop detected for property "verticalAlignment"
2025-01-04T23:36:17.735957+01:00 <computername> dbus-daemon[1734]: [session uid=1001 pid=1734] Activating service name='org.kde.LogoutPrompt' requested by ':1.21' (uid=1001 pid=1922 comm="/usr/bin/plasmashell --no-respawn ")
2025-01-04T23:36:17.877762+01:00 <computername> dbus-daemon[1734]: [session uid=1001 pid=1734] Successfully activated service 'org.kde.LogoutPrompt'
2025-01-04T23:36:18.181410+01:00 <computername> systemd[1]: systemd-hostnamed.service: Deactivated successfully.
2025-01-04T23:36:20.351560+01:00 <computername> dbus-daemon[1734]: [session uid=1001 pid=1734] Activating service name='org.kde.Shutdown' requested by ':1.418' (uid=1001 pid=32700 comm="/usr/lib/ksmserver-logout-greeter ")
2025-01-04T23:36:20.375556+01:00 <computername> dbus-daemon[1734]: [session uid=1001 pid=1734] Successfully activated service 'org.kde.Shutdown'
2025-01-04T23:36:20.391109+01:00 <computername> polkitd[837]: Unregistered Authentication Agent for unix-session:3 (system bus name :1.38, object path /org/kde/PolicyKit1/AuthenticationAgent, locale de_DE.UTF-8) (disconnected from bus)
2025-01-04T23:36:20.429610+01:00 <computername> systemd[1709]: Stopped target plasma-workspace-x11.target.
2025-01-04T23:36:20.429884+01:00 <computername> systemd[1709]: Stopped target KDE Plasma Workspace.
2025-01-04T23:36:20.430125+01:00 <computername> systemd[1709]: Stopped target Startup of XDG autostart applications.
2025-01-04T23:36:20.430176+01:00 <computername> systemd[1709]: Stopping Geoclue Demo agent...
2025-01-04T23:36:20.430337+01:00 <computername> systemd[1709]: Stopping IBus...
2025-01-04T23:36:20.430557+01:00 <computername> systemd[1709]: Stopping Accessibility...
2025-01-04T23:36:20.430662+01:00 <computername> systemd[1709]: Stopping flatpak session helper...
2025-01-04T23:36:20.430902+01:00 <computername> systemd[1709]: Stopping KDE Global Shortcuts Server...
2025-01-04T23:36:20.430962+01:00 <computername> systemd[1709]: Stopping KScreen...
2025-01-04T23:36:20.431018+01:00 <computername> systemd[1709]: Stopping KDE Window Manager...
2025-01-04T23:36:20.431059+01:00 <computername> systemd[1709]: Stopping Powerdevil...
2025-01-04T23:36:20.431107+01:00 <computername> systemd[1709]: Stopping Xdg Desktop Portal For KDE...
2025-01-04T23:36:20.431157+01:00 <computername> systemd[1709]: Stopping Portal service...
2025-01-04T23:36:20.431206+01:00 <computername> systemd[1709]: Stopping flatpak document portal service...
2025-01-04T23:36:20.431249+01:00 <computername> systemd[1709]: Stopping sandboxed app permission store...
2025-01-04T23:36:20.445454+01:00 <computername> systemd[1]: run-user-1001-doc.mount: Deactivated successfully.
2025-01-04T23:36:20.455574+01:00 <computername> systemd[1709]: Stopped flatpak document portal service.
2025-01-04T23:36:20.456011+01:00 <computername> systemd[1709]: Stopped sandboxed app permission store.
2025-01-04T23:36:20.456429+01:00 <computername> systemd[1709]: Stopped KDE Session Management Server.
2025-01-04T23:36:20.456752+01:00 <computername> systemd[1709]: Stopped KDE Global Shortcuts Server.
2025-01-04T23:36:20.457132+01:00 <computername> systemd[1709]: Stopped KDE Plasma Workspace.
2025-01-04T23:36:20.457482+01:00 <computername> systemd[1709]: Stopped Xdg Desktop Portal For KDE.
2025-01-04T23:36:20.457928+01:00 <computername> systemd[1709]: Stopped Geoclue Demo agent.
2025-01-04T23:36:20.458321+01:00 <computername> systemd[1709]: Stopped KScreen.
2025-01-04T23:36:20.460807+01:00 <computername> kded5[1844]: Service  ":1.46" unregistered
2025-01-04T23:36:20.461365+01:00 <computername> systemd[1709]: Stopped Portal service.
2025-01-04T23:36:20.461641+01:00 <computername> systemd[1709]: app-ibus\x2dautostart@autostart.service: Killing process 2144 (gmain) with signal SIGKILL.
2025-01-04T23:36:20.462118+01:00 <computername> systemd[1709]: Stopped flatpak session helper.
2025-01-04T23:36:20.477867+01:00 <computername> systemd-logind[882]: System is powering down.
2025-01-04T23:36:20.481513+01:00 <computername> systemd[1709]: Stopped IBus.
2025-01-04T23:36:20.481615+01:00 <computername> systemd[1709]: Stopped Accessibility.
2025-01-04T23:36:20.496741+01:00 <computername> systemd[1709]: plasma-kwin_x11.service: Main process exited, code=exited, status=15/n/a
2025-01-04T23:36:20.496821+01:00 <computername> systemd[1709]: plasma-kwin_x11.service: Failed with result 'exit-code'.
2025-01-04T23:36:20.496862+01:00 <computername> systemd[1709]: Stopped KDE Window Manager.
2025-01-04T23:36:20.499588+01:00 <computername> systemd[1]: Stopping Session 3 of User <user>...
2025-01-04T23:36:20.499915+01:00 <computername> systemd[1]: Removed slice Slice /system/modprobe.
2025-01-04T23:36:20.500530+01:00 <computername> systemd[1]: Stopped target Graphical Interface.
2025-01-04T23:36:20.501478+01:00 <computername> sddm[1398]: Authentication error: "Process crashed"
2025-01-04T23:36:20.501528+01:00 <computername> systemd[1]: Stopped target Multi-User System.
2025-01-04T23:36:20.501576+01:00 <computername> systemd[1]: Stopped target Login Prompts.
2025-01-04T23:36:20.501889+01:00 <computername> sddm[1398]: Auth: sddm-helper crashed (exit code 15)
2025-01-04T23:36:20.501929+01:00 <computername> sddm[1398]: Authentication error: "Process crashed"
2025-01-04T23:36:20.501959+01:00 <computername> sddm[1398]: Auth: sddm-helper exited with 15
2025-01-04T23:36:20.501990+01:00 <computername> systemd[1]: Stopped target Sound Card.
2025-01-04T23:36:20.502032+01:00 <computername> sddm[1398]: Socket server stopping...
2025-01-04T23:36:20.502066+01:00 <computername> sddm[1398]: Socket server stopped.
2025-01-04T23:36:20.502093+01:00 <computername> sddm[1398]: Display server stopping...
2025-01-04T23:36:20.502121+01:00 <computername> systemd[1]: Stopped target Timer Units.
2025-01-04T23:36:20.502153+01:00 <computername> systemd[1]: backup-rpmdb.timer: Deactivated successfully.
2025-01-04T23:36:20.503066+01:00 <computername> at-spi-bus-launcher[1901]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
2025-01-04T23:36:20.503736+01:00 <computername> at-spi-bus-launcher[1901]:       after 38813 requests (38813 known processed) with 0 events remaining.
2025-01-04T23:36:20.504118+01:00 <computername> kactivitymanagerd[1939]: The X11 connection broke (error 1). Did the X11 server die?
2025-01-04T23:36:20.504382+01:00 <computername> kded5[2105]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
2025-01-04T23:36:20.504414+01:00 <computername> kded5[2105]:       after 28 requests (27 known processed) with 0 events remaining.
2025-01-04T23:36:20.504599+01:00 <computername> xdg-desktop-portal-kde[25909]: The X11 connection broke (error 1). Did the X11 server die?
2025-01-04T23:36:20.506867+01:00 <computername> systemd[1]: Stopped Timeline of Snapper Snapshots.
2025-01-04T23:36:20.506901+01:00 <computername> systemd[1]: systemd-tmpfiles-clean.timer: Deactivated successfully.
2025-01-04T23:36:20.506933+01:00 <computername> systemd[1]: Stopped Daily Cleanup of Temporary Directories.
2025-01-04T23:36:20.507104+01:00 <computername> systemd[1]: lvm2-lvmpolld.socket: Deactivated successfully.
2025-01-04T23:36:20.507227+01:00 <computername> systemd[1]: Closed LVM2 poll daemon socket.
2025-01-04T23:36:20.507330+01:00 <computername> systemd[1]: systemd-rfkill.socket: Deactivated successfully.
2025-01-04T23:36:20.507506+01:00 <computername> systemd[1]: Closed Load/Save RF Kill Switch Status /dev/rfkill Watch.
2025-01-04T23:36:20.507841+01:00 <computername> systemd[1]: Stopping Modem Manager...
2025-01-04T23:36:20.518524+01:00 <computername> ModemManager[900]: <info>  caught signal, shutting down...
2025-01-04T23:36:20.523666+01:00 <computername> systemd[1709]: Stopped Powerdevil.
2025-01-04T23:36:20.524830+01:00 <computername> kded5[1844]: XIO:  fatal IO error 11 (Die Ressource ist zur Zeit nicht verfügbar) on X server ":0"
2025-01-04T23:36:20.524872+01:00 <computername> kded5[1844]:       after 24 requests (24 known processed) with 0 events remaining.
2025-01-04T23:36:20.525117+01:00 <computername> avahi-daemon[827]: Got SIGTERM, quitting.
2025-01-04T23:36:20.525196+01:00 <computername> systemd[1709]: xdg-desktop-portal-gtk.service: Main process exited, code=exited, status=1/FAILURE
2025-01-04T23:36:20.525308+01:00 <computername> avahi-daemon[827]: Leaving mDNS multicast group on interface lo.IPv6 with address ::1.
2025-01-04T23:36:20.525354+01:00 <computername> systemd[1]: Stopping Save/Restore Sound Card State...
2025-01-04T23:36:20.525395+01:00 <computername> avahi-daemon[827]: Leaving mDNS multicast group on interface lo.IPv4 with address 127.0.0.1.
2025-01-04T23:36:20.525429+01:00 <computername> systemd[1]: augenrules.service: Deactivated successfully.
2025-01-04T23:36:20.525464+01:00 <computername> systemd[1709]: xdg-desktop-portal-gtk.service: Failed with result 'exit-code'.
2025-01-04T23:36:20.525503+01:00 <computername> systemd[1]: Stopped auditd rules generation.
2025-01-04T23:36:20.525543+01:00 <computername> systemd[1]: Stopping Avahi mDNS/DNS-SD Stack...
2025-01-04T23:36:20.525583+01:00 <computername> systemd[1]: Stopping Command Scheduler...
2025-01-04T23:36:20.525617+01:00 <computername> kded5[1844]: The X11 connection broke: I/O error (code 1)
2025-01-04T23:36:20.525655+01:00 <computername> systemd[1]: Stopping CUPS Scheduler...
2025-01-04T23:36:20.525689+01:00 <computername> systemd[1]: detect-part-label-duplicates.service: Deactivated successfully.
2025-01-04T23:36:20.525726+01:00 <computername> systemd[1709]: Stopped target KDE Plasma Workspace Core.
2025-01-04T23:36:20.525765+01:00 <computername> systemd[1709]: Stopping KDE Daemon...
2025-01-04T23:36:20.526211+01:00 <computername> systemd[1]: Stopped Detect if the system suffers from bsc#1089761.
2025-01-04T23:36:20.527739+01:00 <computername> systemd[1]: Stopping X Display Manager...
2025-01-04T23:36:20.530101+01:00 <computername> systemd[1]: Stopping Restore /run/initramfs on shutdown...
2025-01-04T23:36:20.530676+01:00 <computername> systemd[1]: Stopping Getty on tty1...
2025-01-04T23:36:20.530935+01:00 <computername> systemd[1]: Stopping irqbalance daemon...
2025-01-04T23:36:20.531057+01:00 <computername> systemd[1]: kbdsettings.service: Deactivated successfully.
2025-01-04T23:36:20.531340+01:00 <computername> systemd[1]: Stopped Apply settings from /etc/sysconfig/keyboard.
2025-01-04T23:36:20.531630+01:00 <computername> systemd[1]: klog.service: Deactivated successfully.
2025-01-04T23:36:20.531860+01:00 <computername> systemd[1]: Stopped Early Kernel Boot Messages.
2025-01-04T23:36:20.532453+01:00 <computername> cron[1251]: (CRON) INFO (Shutting down)
2025-01-04T23:36:20.532498+01:00 <computername> avahi-daemon[827]: avahi-daemon 0.8 exiting.
2025-01-04T23:36:20.532543+01:00 <computername> systemd[1709]: plasma-kactivitymanagerd.service: Main process exited, code=exited, status=1/FAILURE
2025-01-04T23:36:20.532597+01:00 <computername> systemd[1709]: plasma-kactivitymanagerd.service: Failed with result 'exit-code'.
2025-01-04T23:36:20.532639+01:00 <computername> systemd[1709]: Stopped KActivityManager Activity manager Service.
2025-01-04T23:36:20.535131+01:00 <computername> systemd[1]: Stopping Machine Check Exception Logging Daemon...
2025-01-04T23:36:20.536332+01:00 <computername> systemd[1]: Stopping Power Profiles daemon...
2025-01-04T23:36:20.536525+01:00 <computername> systemd[1]: Stopping System Logging Service...
2025-01-04T23:36:20.536702+01:00 <computername> systemd[1]: Stopping RealtimeKit Scheduling Policy Service...
2025-01-04T23:36:20.536877+01:00 <computername> systemd[1]: Stopping Self Monitoring and Reporting Technology (SMART) Daemon...
2025-01-04T23:36:20.538124+01:00 <computername> systemd[1]: Stopping Load/Save Random Seed...
2025-01-04T23:36:20.543872+01:00 <computername> udisksd[1637]: Cleaning up mount point /file/to/ (usb device for tv-recording) (device 8:98 is not mounted)

631 is printer (CUPS), 25 is e-mail SMTP port (postfix is installed by default).

The rest is barely readable. Please post computer text as preformatted or (if it is long) upload to https://paste.opensuse.org/

I uploaded it to openSUSE Paste
I didn’t know how to post it preformated and don’t wanted to add “>” to every line. I thought you can copy&paste it to your editor like kate.
How is it possible zu edit my inital post? Otherwise:
@administrator you can remove the system logs and just paste the above “paste.opensuse” link.

Look at sudo netstat -lnpt | egrep ':631|:25' output to get know processes listening on those ports

@user11u pastes expire, I added code blocks instead… Select your text and use the “</>” format…