Using clients on a nonstop system, Using servers through other clients, The listner process – HP Integrity NonStop H-Series User Manual
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TN6530 runs on a UNIX system on a Sun workstation. Using TN6530, you can log on to a NonStop
system and run applications that depend on the full capabilities of a terminal in the T16/6530
Multi-Page Terminal family.
You can use the SMTP gateway to send mail to and receive mail from host systems on the internet.
You process the mail by using your normal TRANSFER mail service and addressing messages to
the SMTP gateway correspondent, which forwards the mail to the remote system.
Using Clients on a NonStop System
To use a NonStop TCP/IP client program, you must be logged on to a NonStop system. You invoke
the client program at an operating system prompt (usually, a TACL prompt). Complete instructions
for using each client are provided in separate sections of this manual.
Using Servers Through Other Clients
The TCP/IP servers respond to requests for their services sent from a remote system. You must follow
the instructions provided with the client that runs on your system.
The ECHO and FINGER servers provide the services specified in the TCP/IP family of protocols.
These services are provided over TCP ports, but not over User Data Packet (UDP) ports. The services
provided by FTP, TFTP, and TELNET servers are described in
, and
The LISTNER Process
If you want to use FTP to transfer files into an HP NonStop system, the LISTNER process must be
running on that NonStop system. Other aspects of LISTNER functionality are up to you; you can
configure the PORTCONF file to have LISTNER support any services you want.
The LISTNER process functions as a super server for the FTP, SMTP, ECHO, and FINGER servers
provided by HP. It invokes the appropriate NonStop server as connection requests for FTP, SMTP,
ECHO, and FINGER services are received on well-known TCP ports; however, you need not use
well-known port numbers for the services. These services do not apply to UDP ports; LISTNER is a
TCP-oriented program and listens only to TCP ports. The use of the LISTNER process to invoke
several other servers effectively reduces the load on the system.
To use the LISTNER process, configure the $SYSTEM.ZTCPIP.PORTCONF (default) file and start
the LISTNER process. If you do not want to use this default file, specify another file by using the
RUN LISTNER command. When the LISTNER process is started, it reads from the PORTCONF file
to determine which ports it must listen to. The PORTCONF file also defines the servers to be invoked
when a request comes in.
NOTE:
The LISTNER process reads the PORTCONF file on STARTUP and must be restarted if any
changes are made to the PORTCONF file.
Once started, LISTNER reads the SERVICES file to resolve the services configured in the PORTCONF
file, and checks that the service name and corresponding port are valid.
Overview of Applications
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