systemd provides a workaround in the form of systemd-socket-proxyd [1]. Granted it copies data, but when the max performance is not required, it works. Sometime

systemd provides a workaround in the form of systemd-socket-proxyd [1]. Granted it copies data, but when the max performance is not required, it works. Sometimes services allow to be configured to listen UNIX socket path, then systemd-socket-proxyd allows to disable ip address access by forwarding the network socket to that. [1] https://www.freedesktop.org/software/systemd/man/systemd-socket-proxyd.html https://www.freedesktop.org/software/systemd/man/systemd-soc...