Information
The systemd-journal-remote package provides the ability to receive journal log entries from remote hosts over the network, which makes the receiving host a log server. The same package supplies both the sending and the receiving functions; the receiving side is handled by two units, systemd-journal-remote.socket and systemd-journal-remote.service.
If a client is configured to also receive log data, thus turning it into a log server, the client system is acting outside its operational boundary. Disabling the systemd-journal-remote receiver is collector hygiene that applies regardless of whether rsyslog or journald is the primary log path.
Solution
Run the following commands to stop and mask systemd-journal-remote.socket and systemd-journal-remote.service:
# systemctl stop systemd-journal-remote.socket systemd-journal-remote.service
# systemctl mask systemd-journal-remote.socket systemd-journal-remote.service