systemd Developer David Strauss david@davidstrauss.net systemd-socket-proxyd 1 systemd-socket-proxyd Bidirectionally proxy local sockets to another (possibly remote) socket. systemd-socket-proxyd OPTIONS HOST:PORT systemd-socket-proxyd OPTIONS UNIX-DOMAIN-SOCKET-PATH systemd-socket-proxyd is a generic socket-activated network socket forwarder proxy daemon for IPv4, IPv6 and UNIX stream sockets. It may be used to bi-directionally forward traffic from a local listening socket to a local or remote destination socket. One use of this tool is to provide socket activation support for services that do not natively support socket activation. On behalf of the service to activate, the proxy inherits the socket from systemd, accepts each client connection, opens a connection to a configured server for each client, and then bidirectionally forwards data between the two. This utility's behavior is similar to socat1. The main differences for systemd-socket-proxyd are support for socket activation with Accept=false and an event-driven design that scales better with the number of connections. The following options are understood: -h --help Prints a short help text and exits. --version Prints a version string and exits. On success, 0 is returned, a non-zero failure code otherwise. Use two services with a dependency and no namespace isolation. Use a shell script to isolate the service and proxy into the same namespace. This is particularly useful for running TCP-only daemons without the daemon affecting ports on regular interfaces. systemd1, systemd.socket5, systemd.service5, systemctl1, socat1