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PORTRESERVE(1)           TCP port reservation utility           PORTRESERVE(1)
NAME
       portreserve - reserve ports to prevent portmap mapping them
SYNOPSIS
       portreserve
DESCRIPTION
       The portreserve program aims to help services with well-known ports
       that lie in the bindresvport range. It prevents portmap (or other
       programs using bindresvport) from occupying a real service's port by
       occupying it itself, until the real service tells it to release the
       port (generally in its init script).
       It is intended that portreserve runs from an initscript of its own, and
       services wishing to interact with it should use portrelease.
       When the portreserve daemon is started, it examines the
       /etc/portreserve/ directory. Each file not containing "."  or "~" in
       its name is considered to be a service configuration file, and must
       contain a service name (as listed in /etc/services) or a port number.
       UDP services may be specified by appending "/udp" to the service name,
       and TCP services by "/tcp". Several services may be specified, one per
       line.
       For example, /etc/portreserve/cups might contain the string "ipp" or,
       equivalently, "ipp/tcp" and "ipp/udp" on separate lines.
       For each service configuration file, a socket is created and bound to
       the appropriate port. A service wishing to bind to its port must first
       run portrelease, which instructs portreserve to release the port
       associated with the service.
       Once all the reserved ports have been released, the daemon exits.
FILES
       /etc/portreserve/*
           Service configuration files
       /var/run/portreserve/socket
           communication socket for portrelease
SEE ALSO
       portrelease(1)
AUTHOR
       Tim Waugh <twaugh AT redhat.com>
           Author.
portreserve                       1 July 2008                   PORTRESERVE(1)