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000039_news@newsmaster….columbia.edu _Tue Jul 8 14:30:36 1997.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: reverse telnet using raw TCP (Linux modemd)
Date: 8 Jul 1997 18:30:35 GMT
Organization: Columbia University
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In article <5ptsrj$mfk@chagall.cti-software.nl>,
Pim Zandbergen <pim@cti-software.nl> wrote:
: I am trying to get K95 working as a client for modemd for Linux.
: Modemd allows a client PC to use a modem connected to a Linux server.
: It listens to a predefined TCP port and then connects the client supposedly
: transparantly to the modem.
:
: Modemd is basically a modified telnetd. But it does not do any TELNET
: negotiations and does not set up a pty, but opens a modem device instead.
:
: When I connect to this port using K95, I have to use
: set telnet echo remote
: in order to prevent double echoes.
:
Because, in the absence of any Telnet negotiations to the contrary
(DO/DONT/WILL/WONT ECHO), echo is local. Therefore modemd is acting
improperly by echoing.
: But there is one problem I cannot seem to prevent: when I type
: AT<CR>, the modem responds with OK<CR><NL><NL> instead of OK<CR><NL>.
:
Again, I think the problem is that K95 is obeying the Telnet NVT
specification and the server is not. K95 has a command to let you tell
it to skip the proper NVT behavior with regard to carriage returns:
SET TELNET NEWLINE BINARY { ON, OFF, RAW }
Try "raw" or "off".
- Frank