kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ ls -l /etc/rsyslog.d/
total 12
-rw-r--r-- 1 root root  314 May 16  2023 20-ufw.conf
-rw-r--r-- 1 root root  255 Jul 24 01:34 21-cloudinit.conf
-rw-r--r-- 1 root root 1124 Aug 22  2025 50-default.conf
kazulog@sv1:~$ grep -n 'imudp\|imtcp\|AllowedSender' /etc/rsyslog.conf
17:#module(load="imudp")
18:#input(type="imudp" port="514")
21:#module(load="imtcp")
22:#input(type="imtcp" port="514")
kazulog@sv1:~$ sudo systemctl restart rsyslog
kazulog@sv1:~$ sudo ss -ulnp 'sport = :514'; echo "ss rc=$?"
State                  Recv-Q                  Send-Q                                   Local Address:Port                                   Peer Address:Port                 Process
ss rc=0
kazulog@sv1:~$ logger -t kazulog-local "kazulog-local-after-disable"
kazulog@sv1:~$ sudo grep kazulog-local-after-disable /var/log/syslog
2026-09-12T08:34:01.305691+09:00 ubuntu kazulog-local: kazulog-local-after-disable