strings /usr/sbin/ulogd | grep "\.conf"

/etc/ulogd.conf



Can't restart it:

Job for ulogd2.service failed because the service did not take the steps required by its unit configuration.

See "systemctl status ulogd2.service" and "journalctl -xeu ulogd2.service" for details.



May 08 23:34:45 wireguard systemd[1]: ulogd2.service: Failed with result 'protocol'.

May 08 23:34:45 wireguard systemd[1]: Failed to start ulogd2.service - Netfilter Userspace Logging Daemon.



journalctl -u ulogd2 -n 20

May 08 23:25:53 wireguard ulogd[77126]: forcing unbind of existing log handler for protocol 10

May 08 23:25:53 wireguard ulogd[77126]: forcing unbind of existing log handler for protocol 7

May 08 23:25:53 wireguard ulogd[77126]: Could not nice process: Operation not permitted

May 08 23:25:53 wireguard ulogd[77126]: Changing UID / GID

May 08 23:25:53 wireguard ulogd[77126]: initialization finished, entering main loop

May 08 23:34:45 wireguard systemd[1]: Stopping ulogd2.service - Netfilter Userspace Logging Daemon...

May 08 23:34:45 wireguard ulogd[77126]: Terminal signal received, exiting

May 08 23:34:45 wireguard systemd[1]: ulogd2.service: Deactivated successfully.

May 08 23:34:45 wireguard systemd[1]: Stopped ulogd2.service - Netfilter Userspace Logging Daemon.

May 08 23:34:45 wireguard ulogd[78531]: registering plugin `NFLOG'

May 08 23:34:45 wireguard ulogd[78531]: registering plugin `BASE'

May 08 23:34:45 wireguard ulogd[78531]: registering plugin `IP2STR'

May 08 23:34:45 wireguard ulogd[78531]: load_plugin: '/usr/lib/x86_64-linux-gnu/ulogd/ulogd_output_JSON.so': /usr/lib/x86_64-linux-gnu/ulogd/ulogd_output_JSON.so: cannot open shared object file: No such file or directory

May 08 23:34:45 wireguard ulogd[78531]: building new pluginstance stack: 'log1:NFLOG,base1:BASE,ip2str1:IP2STR,json1:JSON'

May 08 23:34:45 wireguard ulogd[78531]: can't find requested plugin JSON

May 08 23:34:45 wireguard ulogd[78531]: not even a single working plugin stack

May 08 23:34:45 wireguard systemd[1]: Starting ulogd2.service - Netfilter Userspace Logging Daemon...

May 08 23:34:45 wireguard systemd[1]: ulogd2.service: Can't open PID file /run/ulog/ulogd.pid (yet?) after start: No such file or directory

May 08 23:34:45 wireguard systemd[1]: ulogd2.service: Failed with result 'protocol'.

May 08 23:34:45 wireguard systemd[1]: Failed to start ulogd2.service - Netfilter Userspace Logging Daemon.