netgpd(1M)               DG/UX B2 Security R4.12MU02              netgpd(1M)


NAME
       netgpd - NETwork Generic Proxy Daemon

SYNOPSIS
       netgpd [-gqrv] [-b begin-port] [-e end-port] [-F FTP-proxy-port] [-f
                 FTP2-proxy-port] [-i UDP-inactivity-timeout] [-I TCP-
                 inactivity-timeout] [-m max-sessions] [-T TCP-proxy-port]
                 [-U UDP-proxy-port]

DESCRIPTION
       Netgpd provides transparent proxy support for generic TCP and UDP
       services, as well as for FTP.  The proxy-port ports identify which
       ports netgpd listens on in order to provide transparent support.  In
       order to redirect packets to these proxy ports, a netctrl(1M) filter
       with a PROXY action must be installed.


   Options
       -b     Specifies the beginning of the port number range to utilize
              when creating proxy endpoints.  The default is 10000.

       -e     Specifies the end of the port number range to utilize when
              creating proxy endpoints.  The default is 65535.

       -F     Specifies the FTP port to listen on.  All TCP connections to
              FTP-proxy-port are automatically treated as FTP connections
              even if the destination port is not 21.  If the destination
              port is 21, a TCP connection is automatically treated as an
              FTP connection; therefore, netgpd can listen on a single port
              for TELNET and FTP traffic.

       -f     The same as the -F option except that the IP address in the
              PORT command is automatically over-written by the IP address
              of the client.  This will be necessary if address translation
              occurs between the client and the proxy.  If a normal FTP
              connection is used and address translation does occur between
              the client and the proxy, then the FTP command connection will
              succeed, but the FTP data connections will fail.

       -g     This option only affects UDP sessions.  Transmit and receive
              UDP packets on an unconnected endpoint.  The default is to use
              a connected UDP endpoint.  This option is required in order
              for tftp to work.

       -i     Specifies the inactivity timeout value in seconds for all UDP
              sessions.  A value of 0 means that there is no timeout.  The
              default value is 600 (i.e. 10 minutes).

       -I     Specifies the inactivity timeout value in seconds for all TCP
              sessions.  A value of 0 means that there is no timeout.  The
              default value is 0.  TCP connections are automatically dropped
              when both the client and server have closed the connection.

       -m     Max-sessions specifies the maximum number of sessions to
              concurrently proxy.  The default value is 500.  Note that this
              value directly affects the swap space usage of netgpd.

       -q     Quiet.  Decrements the verbosity level.  The verbosity levels
              in increasing cumulative order are: usage (usage errors),
              fatal (fatal run-time errors), error (non-fatal run-time
              errors), warning (unexpected behavior detected), debug (open
              and close sessions), and ftp (commands traversing an FTP
              command connection).  The default level is warning.

       -r     Reuse option.  Set the REUSEADDR socket option on all sockets
              listening on a proxy-port port.

       -T     Specifies the TCP port to listen on.  All TCP connections are
              transparently proxied to their intended destination.
              Connections to port 21 are specially handled as FTP
              connections.

       -U     Specifies the UDP port to listen on.  All UDP connections are
              transparently proxied to their intended destination.

       -v     Verbose.  Increments the verbosity level.  See -q for a
              description of the verbosity levels.


EXAMPLES
       Start the proxy daemon on port 9999 for generic TCP and FTP
       connections.

       # netgpd -T 9999 > /etc/log/netgpd.log 2>&1 &



SEE ALSO
       netctrl(1M), netctrl.config(4M)


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