RE: (PM) telnet out on non-standard ports

Frank Heinzius (frimp@mms.de)
Fri, 30 Apr 1999 16:50:23 +0200

Hi all,

just calm down. It works and has ever worked:

On 30 Apr 99, at 9:24, Jake Messinger wrote:

> Well I guess it wasnt important? But then if you set your telnet ports to
> something OTHER than 23, which is a capability of the PM and has been since
> 1991, then youd think theyd have CHECKED their telnet out.
>

There are two problems:

(1) telnet ECHO has to be provided by the client, not the server. Normal telnet daemons
provide host based echo, thatīs why you see characters. Some telnet clients allow local
echo to be switched on and off. Portmasters donīt.

(2) Telnet allows to be set from "character at a time" mode to "line by line" mode. This
has also to be done by the client. "line by line" offers local echo, local editing and
block sends a TCP packet with the whole line stored in after sending EOL or EOF

What you experience is "no echo". Your characters get sent to the host, but you have to
send the EOL character to your application. Now the "aaaaaaaaaah": EOL is defined by your
server side application or OS. Your SMTP process runs on Unix. Unix EOL is Linefeed LF,
$0A, ^J, however. The Portmaster sends Carriage Return CR, $0D, ^M, however.

Just terminate your not-echoed command with ^J instead of <Enter>, end youīll be fine ;-)

Kind Regards / Mit freundlichen Gruessen,

--
Frank M. Heinzius               MMS Communication AG
mailto:frimp@mms.de             Eiffestrasse 598
http://www.mms.de               20537 Hamburg, Germany
Phone: +49 40 211105-40         Fax: +49 40 210 32 210
-- spam forbidden --            -- PGP key available --
-
To unsubscribe, email 'majordomo@livingston.com' with
'unsubscribe portmaster-users' in the body of the message.
Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>