The xportal program is a generic X.25 portal server for the LayGO PXS. xportal accepts connection via TCP/IP from clients wishing to access an X.25 PVC or SVC, handling all the deatils of the X.25 session internally. Clients interact with xportal using a simple API implementing a "packetizing" protocol to map between the stream based semantics of TCP/IP and the packet based semantics of X.25.
The xportal server listens for client connections
on TCP port 49167. The port number can be changed by setting the
environment variable on the PXS using the RedBoot environment
command. For instance, to configure xportal to listen on TCP
Advanced Relay Corporation LayGO PXS - Protocol eXchange Server LayGO PXS Boot Version 3.20 RedBoot(tm) Debug Environment - Built 17:33:51, Sep 13 2004 Portions Copyright (c) 2000, Red Hat, Inc. Portions Copyright (c) 2001, Comtrol Corp. Portions Copyright (c) 2003, Advanced Relay Corp. RedBoot> env Application environment: <none> RedBoot> env XPORTALPORT=49999 Application environment: XPORTALPORT=49999