Re: Establishing P-t-P FTP connection -- MIDRANGE-L

A modem is used to establish a TCP/IP connection to a specific destination ,

much like a home computer dialing (I still do this - vanishing breed)an ISP. Once the ISP modem answers, a SLIP connection is established.


Point of using P-t-P is that a (relatively) secure connection is established
between two specific points.

We currently use ZMODEM over an async modem.  But, the other party is having
difficulty with their phone system.  They feel a change is needed.  ZMODEM
provides the capability to transmit and receive files.  Difference between
ZMODEM and P-t-P connection is that standard FTP can be used, and the
connection is a direct connection.  I would think this would be slightly more
secure than a straight, unencrypted FTP connection, as the route is more
direct.

In looking at the setup, it appears that at a minimum, a controllerdescription

would be required as that would be the mechanism where the disliag process
would be initiated.

With ZMODEM, a line/controller/device is also created.  The actual dialing
process is controlled by commands within ZMODEM, specifically, the DIAL

command. With a P-t-P connection the dialing (has to be a more modernword) is

initiated when the configuration items are varied on.

With a P-t-P connection, the default route is NOT the standard gateway,but the

dialup connection.

At least, that is my understanding.

John McKee

Quoting Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>:

What are commands needed to establish a Point-to-Point FTP connection?


Do you mean a point-to-point TCP/IP connection?  in other words, SLIP or
PPP?  Or do you mean something like PPTP?  Or PPoE?

FTP is just a program that runs over TCP/IP.  It doesn't matter whether
that TCP connection was established via SLIP/PPP, or whether it uses any
of the hundreds of other ways of establishing a TCP/IP connection.
(Etherhet, Token Ring, FDDI, ISDN, etc, etc, etc.)  FTP doesn't know or
care which underlying physical media is used to transport the TCP/IP
packets. It just uses TCP/IP.  Let the operating system worry about how to
transport the packets!

This is true of all TCP/IP software, of which FTP is only one.  Others
(TELNET, E-MAIL, WEB, etc, etc) will also work over the same PTP
connection.

I am assuming that a line description. controller, and device
description are needed and must be manually created before ADDTCPPTP can
be used.  The iSeries already has functioning access to the internet.


I'm lost.  If you already have internet access, why do you need a
point-to-point connection?

Not sure where to look for the answers and appreciate all assistance.


A quick Google search found this:
http://tinyurl.com/35bun8

It has lots of links to information about configuring and troublehsooting
SLIP and PPP.  Of course, I'm not exactly sure if that's what you're
looking for...
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