Re: SLIP/PPP question (NOT the usual)

[nparker@cie-2.uoregon.edu (Neil Parker)]

In article <334471DB.36B3@no.no> Eric Jacobs <no@no.no> writes:
>> There's also the fact that when a true (port 25) telnet connection first
>> starts up, the client and the server exchange a series of special control
>> codes so that each can determine which features the other is willing to
>> support.  This feature negotiation doesn't occur for connections to ports
>> other than 25 (because whatever's on the other end of the connection
>> probably won't know what to do with the telnet negotiation codes).
>
>It's port 23, dude..

Oh, ack.  How embarrassing.

OK, everybody please go back and change the words "port 25" to "port 23"
in my previous post.

Thank you.


>I've only had luck using Telnet on its happy port 23. Ports 21 and 25 seem to
>just hang up the other server. It's probably those negotiation codes, like you
>said.

Probably.  I have encountered old telnet clients that blindly send the telnet
negotiation codes to whatever they connect to.  Newer telnet clients (at
least on UNIX) seem to be smart enough to skip the negotiation for ports
other than 23.

>It does seem like there should be a generic something program that can
>communicate over any port, because most of the commands and responses are text
>anyway.. but it doesn't seem like there is one.

Newer telnet clients (at least on UNIX) seem to be able to handle this just
fine.  The telnet client on the machine I'm on right now (SunOS 4.1.1) has
no trouble talking to the FTP port, the SMTP port, the HTTP port, or
anything else that uses plain text commands.

But I've never seen anything that specifically claimed to be a generic
"connect to anything" client.  I doubt it would be very hard to write one.

               - Neil Parker

(Disclaimer:  I've lost track of how all this relates to the Apple II.)
-- 
Neil Parker, nparker@{cie-2,cie}.uoregon.edu, http://cie-2.uoregon.edu/~nparker
     "Evolution is vastly overrated."  -- Ambassador Delenn, _Babylon_5_

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