telnetd man page on OPENSTEP

Man page or keyword search:  
man Server   1419 pages
apropos Keyword Search (all sections)
Output format
OPENSTEP logo
[printable version]


TELNETD(8C)							   TELNETD(8C)

NAME
       telnetd - DARPA TELNET protocol server

SYNOPSIS
       /usr/etc/telnetd

DESCRIPTION
       Telnetd	is  a  server which supports the DARPA standard TELNET virtual
       terminal protocol.  Telnetd is invoked  by  the	internet  server  (see
       inetd(8)),  normally  for  requests  to	connect	 to the TELNET port as
       indicated by the /etc/services file (see services(5)).

       Telnetd operates by allocating a pseudo-terminal	 device	 (see  pty(4))
       for a client, then creating a login process which has the slave side of
       the pseudo-terminal as stdin, stdout, and stderr.  Telnetd  manipulates
       the  master  side  of  the  pseudo-terminal,  implementing  the	TELNET
       protocol and passing characters between the remote client and the login
       process.

       When  a	TELNET	session is started up, telnetd sends TELNET options to
       the  client  side  indicating  a	 willingness  to  do  remote  echo  of
       characters,  to	suppress  go  ahead,  and  to  receive	terminal  type
       information from the remote client.  If the remote client  is  willing,
       the  remote  terminal  type  is	propagated  in	the environment of the
       created login process.  The pseudo-terminal allocated to the client  is
       configured  to  operate	in  “cooked”  mode,  and  with XTABS and CRMOD
       enabled (see tty(4)).

       Telnetd is willing to do: echo, binary, suppress go ahead,  and	timing
       mark.   Telnetd	is  willing  to	 have  the  remote  client do: binary,
       terminal type, and suppress go ahead.

SEE ALSO
       telnet(1C)

BUGS
       Some TELNET commands are only partially implemented.

       The TELNET protocol allows for the exchange of the number of lines  and
       columns on the user's terminal, but telnetd doesn't make use of them.

       Because	of  bugs  in the original 4.2 BSD telnet(1C), telnetd performs
       some dubious protocol exchanges to try to discover if the remote client
       is, in fact, a 4.2 BSD telnet(1C).

       Binary  mode  has  no  common  interpretation  except  between  similar
       operating systems (Unix in this case).

       The terminal type name received from the remote client is converted  to
       lower case.

       The packet interface to the pseudo-terminal (see pty(4)) should be used
       for more intelligent flushing of input and output queues.

       Telnetd never sends TELNET go ahead commands.

       There can be a loss of  characters  or  improper	 handling  of  special
       characters  (e.g.,  carriage  returns  and  line feeds) during a telnet
       session from a local non-NEXTSTEP host to a remote NEXTSTEP host.  This
       can  be	fixed  by  using the stty -extproc on the remote NEXTSTEP host
       you're logged into (either from the command line or adding it  to  your
       .login  file).  This  causes characters to be processed external to the
       terminal driver.

4.2 Berkeley Distribution	 May 28, 1986			   TELNETD(8C)
[top]
                             _         _         _ 
                            | |       | |       | |     
                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 
More information is available in HTML format for server OPENSTEP

List of man pages available for OPENSTEP

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net