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NOTE
Permit access from a specific TCP/IP address. If you
know the TCP/IP address of the TN3270 client, select
this option and enter the address in the standard
TCP/IP dotted decimal address format.
Support TN3270E
The level of TN3270 support provided by the node:
TN3270
Support only the TN3270 protocol. Selecting this option
disables server support for TN3270E protocols, even if
they are supported on the client.
TN3270E
Support both TN3270 and TN3270E protocols (the
default).
TN3270 and TN3287 protocols are always supported,
regardless of which option you choose.
TCP/IP port number
The TCP/IP port number (on the TN server) for the
port to which the TN3270 client connects.
TCP/IP ports are completely unrelated to SNA ports.
The well-known port number for the TN3270 service is
23, but use of this port number is likely to clash with
the HP-UX system TELNET service. SNAplus2
includes a utility to enable this port to be shared
between the telnet and TN3270 daemons; that utility
must be installed for both to work. For details about
this utility, refer to the information for the
define_tn3270_access command in HP-UX
SNAplus2 Administration Command Reference.
If you choose a different port number that is not in use
on the TN server, you also need to configure that port
number on the TN3270 clients (or start the TN3270
clients using an option to specify the port number).
Port numbers above 2000 are likely to be available.
Port numbers in the range 256–1023 may give slightly
better security, but are more likely to be in use.
Chapter 9
Configuring Passthrough Services
Configuring TN Server
227
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