telnet(1) 맨 페이지 - 윈디하나의 솔라나라

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telnet

Name
     telnet - user interface to a remote system using the  TELNET
     protocol

Synopsis
     telnet [-8EFKLacdfrx] [-X atype] [-e escape_char]
          [-k realm] [-l user] [-n file]
          [ [ [!] @hop1 [@hop2...] @] host [port]]

Description
     The telnet utility communicates with another host using  the
     TELNET  protocol. If telnet is invoked without arguments, it
     enters command mode, indicated by its  prompt,  telnet>.  In
     this  mode, it accepts and executes its associated commands.
     See USAGE. If it is invoked with arguments, it  performs  an
     open command with those arguments.


     If, for example, a host is specified as @hop1@hop2@host, the
     connection  goes  through  hosts  hop1 and hop2, using loose
     source routing to end at host. If a leading ! is  used,  the
     connection  follows  strict source routing. Notice that when
     telnet uses IPv6, it can only use loose source routing,  and
     the connection ignores the !.


     Once a connection has been opened, telnet enters input mode.
     In  this  mode,  text  typed is sent to the remote host. The
     input mode entered will be either "line mode", "character at
     a  time",  or  "old  line  by line", depending upon what the
     remote system supports.


     In "line mode", character processing is done  on  the  local
     system,  under  the control of the remote system. When input
     editing or character echoing is to be disabled,  the  remote
     system  will  relay that information. The remote system will
     also relay changes to any special characters that happen  on
     the remote system, so that they can take effect on the local
     system.


     In "character at a time" mode, most text  typed  is  immedi-
     ately sent to the remote host for processing.


     In "old line by line" mode, all text is echoed locally,  and
     (normally) only completed lines are sent to the remote host.
     The "local echo character" (initially ^E)  may  be  used  to
     turn  off  and  on the local echo. (Use this mostly to enter
     passwords without the password being echoed.).

     If the "line mode" option is enabled, or if  the  localchars
     toggle is TRUE (the default in "old line by line" mode), the
     user's quit, intr, and flush characters are trapped locally,
     and sent as TELNET protocol sequences to the remote side. If
     "line mode" has ever been enabled, then the user's susp  and
     eof are also sent as TELNET protocol sequences. quit is then
     sent as a TELNET ABORT instead of BREAK. The options  toggle
     autoflush  and  toggle  autosynch cause this action to flush
     subsequent output to the terminal  (until  the  remote  host
     acknowledges  the  TELNET  sequence);  and to flush previous
     terminal input, in the case of quit and intr.


     While connected to a remote host, the user can enter  telnet
     command  mode  by  typing  the telnet escape character (ini-
     tially ^]). When in command mode, the normal terminal  edit-
     ing conventions are available. Pressing RETURN at the telnet
     command prompt causes telnet to exit command mode.

Options
     The following options are supported:

     -8
         Specifies an 8-bit data  path.  Negotiating  the  TELNET
         BINARY option is attempted for both input and output.


     -a
         Attempts automatic login. This sends the  user  name  by
         means  of  the  USER  variable of the ENVIRON option, if
         supported by the remote system. The name used is that of
         the  current  user  as  returned  by  getlogin(3C) if it
         agrees with the current user ID. Otherwise,  it  is  the
         name associated with the user ID.


     -c
         Disables the reading of the user's telnetrc  file.  (See
         the toggle skiprc command on this reference page.)


     -d
         Sets the initial value of the debug toggle to TRUE.


     -e escape_char
         Sets  the  initial  escape  character  to   escape_char.
         escape_char  may  also  be a two character sequence con-
         sisting of ^ (Control key) followed by one character. If
         the   second  character  is  ?,  the  DEL  character  is
         selected. Otherwise, the second character  is  converted
         to a control character and used as the escape character.
         If escape_char is defined as the null string  (that  is,
         -e  `'),  this  is equivalent to -e `^@' (Control-@). To
         specify that no character can be the  escape  character,
         use the -E option.


     -E
         Stops any character from being recognized as  an  escape
         character.


     -f
         Forwards a copy of the local credentials to  the  remote
         system.


     -F
         Forwards a forwardable copy of the local credentials  to
         the remote system.


     -k realm
         If Kerberos authentication is being used, requests  that
         telnet  obtain  tickets  for  the  remote  host in realm
         instead of the remote host's default realm as determined
         in krb5.conf(4).


     -K
         Specifies no automatic login to the remote system.


     -l user
         When connecting to a remote system that understands  the
         ENVIRON  option,  then  user  will be sent to the remote
         system as the value for the ENVIRON variable USER.


     -L
         Specifies an 8-bit data path on output. This causes  the
         BINARY option to be negotiated on output.


     -n tracefile
         Opens tracefile for recording trace information. See the
         set tracefile command below.

     -r
         Specifies a user interface similar to  rlogin.  In  this
         mode, the escape character is set to the tilde (~) char-
         acter, unless modified by  the  -e  option.  The  rlogin
         escape  character is only recognized when it is preceded
         by a carriage return. In this mode,  the  telnet  escape
         character,  normally  `^]',  must still precede a telnet
         command. The rlogin escape character can  also  be  fol-
         lowed  by  `.\r' or `^Z', and, like rlogin(1), closes or
         suspends the connection, respectively. This option is an
         uncommitted interface and may change in the future.


     -x
         Turns on encryption of the data stream. When this option
         is  turned on, telnet will exit with an error if authen-
         tication cannot be negotiated or if encryption cannot be
         turned on.


     -X atype
         Disables the atype type of authentication.

Usage
  telnet Commands
     The commands described in this section  are  available  with
     telnet.  It is necessary to type only enough of each command
     to uniquely identify it. (This is also true for arguments to
     the  mode,  set,  toggle,  unset,  environ, and display com-
     mands.)

     auth argument ...
         The  auth  command  manipulates  the  information   sent
         through  the TELNET AUTHENTICATE option. Valid arguments
         for the auth command are as follows:

         disable type
             Disables the specified type  of  authentication.  To
             obtain  a list of available types, use the auth dis-
             able ? command.


         enable type
             Enables the specified  type  of  authentication.  To
             obtain  a  list  of  available  types,  use the auth
             enable ? command.

         status
             Lists the current status of  the  various  types  of
             authentication.



     open [-l user ] [ [!] @hop1 [@hop2 ...]@host [ port ]
         Open a connection to the named host. If no  port  number
         is  specified,  telnet  will attempt to contact a TELNET
         server at the default port. The host  specification  may
         be  either  a  host  name  (see hosts(4)) or an Internet
         address specified in the "dot notation" (see inet(7P) or
         inet6(7P)). If the host is specified as @hop1@hop2@host,
         the connection goes through hosts hop1 and  hop2,  using
         loose  source  routing  to  end at host. The @ symbol is
         required as a separator between the hosts specified.  If
         a  leading  !  is used with IPv4, the connection follows
         strict source routing.

         The -l option passes  the  user  as  the  value  of  the
         ENVIRON variable USER to the remote system.


     close
         Close any open TELNET session. An EOF (in command  mode)
         will also close a session and exit.


     encrypt
         The encrypt command  manipulates  the  information  sent
         through the TELNET ENCRYPT option.

         Valid arguments for the encrypt command are as follows:

         disable type [input|output]
             Disables the specified type of  encryption.  If  you
             omit the input and output, both input and output are
             disabled. To obtain a list of available  types,  use
             the encrypt disable ? command.


         enable type [input|output]
             Enables the specified type  of  encryption.  If  you
             omit  input  and  output,  both input and output are
             enabled. To obtain a list of  available  types,  use
             the encrypt enable ? command.

         input
             This is the same as the encrypt start input command.


         -input
             This is the same as the encrypt stop input command.


         output
             This is the same as the encrypt  start  output  com-
             mand.


         -output
             This is the same as the encrypt stop output command.


         start [input|output]
             Attempts to start encryption. If you omit input  and
             output, both input and output are enabled. To obtain
             a list of available types, use the encrypt enable  ?
             command.


         status
             Lists the current status of encryption.


         stop [input|output]
             Stops encryption. If  you  omit  input  and  output,
             encryption is on both input and output.


         type type
             Sets the default type of encryption to be used  with
             later encrypt start or encrypt stop commands.



     quit
         Same as close.


     z
         Suspend telnet. This command only works when the user is
         using a shell that supports job control, such as sh(1).

     mode type
         The remote host is asked for permission to go  into  the
         requested  mode. If the remote host is capable of enter-
         ing that mode, the requested mode will be  entered.  The
         argument type is one of the following:

         character
             Disable the  TELNET  LINEMODE  option,  or,  if  the
             remote side does not understand the LINEMODE option,
             then enter "character at a time" mode.


         line
             Enable the TELNET LINEMODE option, or, if the remote
             side  does  not understand the LINEMODE option, then
             attempt to enter "old-line-by-line" mode.


         isig (-isig)
             Attempt to enable (disable) the TRAPSIG mode of  the
             LINEMODE  option.  This  requires  that the LINEMODE
             option be enabled.


         edit (-edit)
             Attempt to enable (disable) the  EDIT  mode  of  the
             LINEMODE  option.  This  requires  that the LINEMODE
             option be enabled.


         softtabs (-softtabs)
             Attempt to enable (disable) the SOFT_TAB mode of the
             LINEMODE  option.  This  requires  that the LINEMODE
             option be enabled.


         litecho (-litecho)
             Attempt to enable (disable) the LIT_ECHO mode of the
             LINEMODE  option.  This  requires  that the LINEMODE
             option be enabled.


         ?
             Prints out help information for the mode command.

     status
         Show the current status of  telnet.  This  includes  the
         peer one is connected to, as well as the current mode.


     display
         [argument...] Display all, or some, of the set and  tog-
         gle values (see toggle argument...).


     ?
         [command] Get help. With no arguments, telnet  prints  a
         help  summary.  If  a  command is specified, telnet will
         print the help information for just that command.


     send argument...
         Send one or more  special  character  sequences  to  the
         remote host. The following are the arguments that can be
         specified (more than one argument may be specified at  a
         time):

         escape
             Send the current telnet escape character  (initially
             ^]).


         synch
             Send the TELNET SYNCH sequence. This  sequence  dis-
             cards  all previously typed, but not yet read, input
             on the remote system. This sequence is sent  as  TCP
             urgent data and may not work if the remote system is
             a 4.2 BSD system. If it does not work,  a  lowercase
             "r" may be echoed on the terminal.


         brk or break
             Send the TELNET BRK (Break) sequence, which may have
             significance to the remote system.


         ip
             Send the TELNET  IP  (Interrupt  Process)  sequence,
             which  aborts  the  currently running process on the
             remote system.

         abort
             Send the TELNET ABORT (Abort Process) sequence.


         ao
             Send the TELNET AO (Abort  Output)  sequence,  which
             flushes  all  output  from  the remote system to the
             user's terminal.


         ayt
             Send the TELNET AYT (Are  You  There)  sequence,  to
             which the remote system may or may not respond.


         ec
             Send the TELNET EC (Erase Character) sequence, which
             erases the last character entered.


         el
             Send the TELNET  EL  (Erase  Line)  sequence,  which
             should  cause  the  remote  system to erase the line
             currently being entered.


         eof
             Send the TELNET EOF (End Of File) sequence.


         eor
             Send the TELNET EOR (End Of Record) sequence.


         ga
             Send the TELNET GA (Go Ahead) sequence, which  prob-
             ably has no significance for the remote system.


         getstatus
             If the remote side supports the TELNET  STATUS  com-
             mand,  getstatus  will  send  the  subnegotiation to
             request that the  server  send  its  current  option
             status.

         nop
             Send the TELNET NOP (No Operation) sequence.


         susp
             Send the TELNET SUSP (Suspend Process) sequence.


         do option
         dont option
         will option
         wont option
             Send the TELNET protocol  option  negotiation  indi-
             cated.  Option  may be the text name of the protocol
             option, or the number corresponding to  the  option.
             The  command  will be silently ignored if the option
             negotiation indicated is not valid  in  the  current
             state. If the option is given as help or ?, the list
             of option names known is  listed.  This  command  is
             mostly useful for unusual debugging situations.


         ?
             Print out help information for the send command.



     set argument [value]
     unset argument
         Set any one  of  a  number  of  telnet  variables  to  a
         specific  value.  The  special  value  off turns off the
         function associated with the  variable.  The  values  of
         variables  may be interrogated with the display command.
         If value is omitted, the value is taken to be  true,  or
         "on".  If  the unset form is used, the value is taken to
         be false, or off. The variables that  may  be  specified
         are:

         echo
             This is the value (initially ^E) that, when in "line
             by  line"  mode,  toggles  between  local echoing of
             entered  characters  for  normal   processing,   and
             suppressing echoing of entered characters, for exam-
             ple, entering a password.


         escape
             This is the telnet escape character  (initially  ^])
             that  enters telnet command mode when connected to a
             remote system.


         interrupt
             If telnet is in localchars mode (see toggle,  local-
             chars)  and the interrupt character is typed, a TEL-
             NET IP sequence (see send and ip)  is  sent  to  the
             remote  host.  The  initial  value for the interrupt
             character is taken to be the terminal's intr charac-
             ter.


         quit
             If telnet is in localchars mode and the quit charac-
             ter  is typed, a TELNET BRK sequence (see send, brk)
             is sent to the remote host. The  initial  value  for
             the  quit  character  is  taken to be the terminal's
             quit character.


         flushoutput
             If telnet is in localchars mode and the  flushoutput
             character  is typed, a TELNET AO sequence (see send,
             ao) is sent to the remote host.  The  initial  value
             for   the   flush  character  is  taken  to  be  the
             terminal's flush character.


         erase
             If telnet is in localchars  mode  and  operating  in
             "character  at  a  time"  mode,  then when the erase
             character is typed, a TELNET EC sequence (see  send,
             ec)  is sent to the remote system. The initial value
             for  the  erase  character  is  taken  to   be   the
             terminal's erase character.


         kill
             If telnet is in localchars  mode  and  operating  in
             "character at a time" mode, then when the kill char-
             acter is typed, a TELNET EL sequence (see send,  el)
             is  sent to the remote system. The initial value for
             the kill character is taken  to  be  the  terminal's
             kill character.


         eof
             If telnet is operating  in  "line  by  line"/  mode,
             entering the eof character as the first character on
             a line sends this character to  the  remote  system.
             The  initial  value  of  eof  is  taken  to  be  the
             terminal's eof character.


         ayt
             If telnet is in  localchars  mode,  or  LINEMODE  is
             enabled, and the status character is typed, a TELNET
             AYT ("Are You There") sequence is sent to the remote
             host.  (See  send, ayt above.) The initial value for
             ayt is the terminal's status character.


         forw1
         forw2
             If telnet is operating in LINEMODE, and the forw1 or
             forw2 characters are typed, this causes the forward-
             ing of partial lines to the remote system. The  ini-
             tial  values for the forwarding characters come from
             the terminal's eol and eol2 characters.


         lnext
             If telnet is operating in LINEMODE or "old  line  by
             line"  mode,  then the lnext character is assumed to
             be the terminal's lnext character. The initial value
             for   the   lnext  character  is  taken  to  be  the
             terminal's lnext character.


         reprint
             If telnet is operating in LINEMODE or "old  line  by
             line" mode, then the reprint character is assumed to
             be the terminal's  reprint  character.  The  initial
             value  for  reprint  is  taken  to be the terminal's
             reprint character.


         rlogin
             This is the rlogin escape  character.  If  set,  the
             normal telnet escape character is ignored, unless it
             is preceded by this character at the beginning of  a
             line.  The  rlogin  character, at the beginning of a
             line followed by a "." closes the  connection.  When
             followed  by  a  ^Z, the rlogin command suspends the
             telnet command. The initial state is to disable  the
             rlogin escape character.

         start
             If the TELNET TOGGLE-FLOW-CONTROL  option  has  been
             enabled, then the start character is taken to be the
             terminal's start character. The  initial  value  for
             the  kill  character  is  taken to be the terminal's
             start character.


         stop
             If the TELNET TOGGLE-FLOW-CONTROL  option  has  been
             enabled,  then the stop character is taken to be the
             terminal's stop character. The initial value for the
             kill  character  is  taken to be the terminal's stop
             character.


         susp
             If telnet is in  localchars  mode,  or  LINEMODE  is
             enabled,  and the suspend character is typed, a TEL-
             NET SUSP sequence (see send, susp above) is sent  to
             the  remote  host. The initial value for the suspend
             character is taken  to  be  the  terminal's  suspend
             character.


         tracefile
             This is the file to which the output, generated when
             the  netdata  or  the  debug option is TRUE, will be
             written. If tracefile is set to  "-",  then  tracing
             information  will be written to standard output (the
             default).


         worderase
             If telnet is operating in LINEMODE or "old  line  by
             line"  mode,  then this character is taken to be the
             terminal's worderase character.  The  initial  value
             for  the  worderase  character  is  taken  to be the
             terminal's worderase character.


         ?
             Displays the legal set and unset commands.



     slc state
         The slc (Set Local Characters) command is used to set or
         change  the  state of special characters when the TELNET

         LINEMODE option has been enabled. Special characters are
         characters  that get mapped to TELNET commands sequences
         (like ip or quit) or line editing characters (like erase
         and  kill). By default, the local special characters are
         exported. The following values for state are valid:

         check
             Verifies the settings for the current special  char-
             acters. The remote side is requested to send all the
             current special character settings. If there are any
             discrepancies  with  the  local side, the local set-
             tings will switch to the remote values.


         export
             Switches to the local defaults for the special char-
             acters.  The  local  default characters are those of
             the local terminal  at  the  time  when  telnet  was
             started.


         import
             Switches to the  remote  defaults  for  the  special
             characters.  The remote default characters are those
             of the remote system at the  time  when  the  TELNET
             connection was established.


         ?
             Prints out help information for the slc command.



     toggle argument...
         Toggle between TRUE and FALSE  the  various  flags  that
         control  how  telnet  responds  to events. More than one
         argument may be specified. The state of these flags  may
         be  interrogated  with  the display command. Valid argu-
         ments are:

         authdebug
                             Turns on debugging  information  for
                             the authentication code.


         autodecrypt
                             When the TELNET  ENCRYPT  option  is
                             negotiated,  by  default  the actual
                             encryption (decryption) of the  data
                             stream does not start automatically.
                             The autoencrypt  (autodecrypt)  com-
                             mand  states  that encryption of the
                             output  (input)  stream  should   be
                             enabled as soon as possible.


         autologin
                             If the remote side supports the TEL-
                             NET  AUTHENTICATION  option,  telnet
                             attempts  to  use  it   to   perform
                             automatic   authentication.  If  the
                             AUTHENTICATION option  is  not  sup-
                             ported,  the  user's  login  name is
                             propagated   through   the    TELNET
                             ENVIRON  option. This command is the
                             same as specifying the -a option  on
                             the open command.


         autoflush
                             If autoflush and localchars are both
                             TRUE,  then  when  the  ao, intr, or
                             quit characters are recognized  (and
                             transformed  into  TELNET sequences;
                             see set for details), telnet refuses
                             to  display  any  data on the user's
                             terminal  until  the  remote  system
                             acknowledges  (using a TELNET Timing
                             Mark option) that it  has  processed
                             those  TELNET sequences. The initial
                             value for this toggle is TRUE if the
                             terminal  user has not done an "stty
                             noflsh".  Otherwise,  the  value  is
                             FALSE (see stty(1)).


         autosynch
                             If autosynch and localchars are both
                             TRUE, then when either the interrupt
                             or quit characters  are  typed  (see
                             set  for  descriptions  of interrupt
                             and  quit),  the  resulting   TELNET
                             sequence  sent  is  followed  by the
                             TELNET  SYNCH  sequence.  This  pro-
                             cedure  should cause the remote sys-
                             tem to begin throwing away all  pre-
                             viously  typed  input  until both of
                             the TELNET sequences have been  read
                             and acted upon. The initial value of
                             this toggle is FALSE.


         binary
                             Enable or disable the TELNET  BINARY
                             option on both input and output.

         inbinary
                             Enable or disable the TELNET  BINARY
                             option on input.


         outbinary
                             Enable or disable the TELNET  BINARY
                             option on output.


         crlf
                             Determines how carriage returns  are
                             sent.  If  the  value  is TRUE, then
                             carriage returns  will  be  sent  as
                             <CR><LF>.  If  the  value  is FALSE,
                             then carriage returns will  be  send
                             as  <CR><NUL>. The initial value for
                             this toggle is FALSE.


         crmod
                             Toggle RETURN mode. When  this  mode
                             is  enabled,  most RETURN characters
                             received from the remote  host  will
                             be  mapped into a RETURN followed by
                             a line  feed.  This  mode  does  not
                             affect those characters typed by the
                             user, only those received  from  the
                             remote  host.  This  mode  is useful
                             only  for  remote  hosts  that  send
                             RETURN  but never send LINEFEED. The
                             initial value  for  this  toggle  is
                             FALSE.


         debug
                             Toggle socket level debugging  (only
                             available  to  the  super-user). The
                             initial value  for  this  toggle  is
                             FALSE.


         encdebug
                             Turns on debugging  information  for
                             the encryption code.


         localchars
                             If this toggle  is  TRUE,  then  the
                             flush,  interrupt,  quit, erase, and
                             kill characters (see set) are recog-
                             nized  locally, and transformed into
                             appropriate      TELNET      control
                             sequences, respectively ao, ip, brk,
                             ec, and el (see send).  The  initial
                             value  for  this  toggle  is TRUE in
                             "line by line" mode,  and  FALSE  in
                             "character at a time" mode. When the
                             LINEMODE  option  is  enabled,   the
                             value  of localchars is ignored, and
                             assumed  always  to  be   TRUE.   If
                             LINEMODE has ever been enabled, then
                             quit is sent as abort, and  eof  and
                             suspend  are  sent  as  eof and susp
                             (see send above).


         netdata
                             Toggle the display  of  all  network
                             data  (in  hexadecimal  format). The
                             initial value  for  this  toggle  is
                             FALSE.


         options
                             Toggle the display of some  internal
                             TELNET  protocol  processing (having
                             to do with telnet options). The ini-
                             tial value for this toggle is FALSE.


         prettydump
                             When the netdata toggle is  enabled,
                             if prettydump is enabled, the output
                             from the  netdata  command  will  be
                             formatted  in  a  more user readable
                             format. Spaces are put between  each
                             character  in the output. The begin-
                             ning of any TELNET  escape  sequence
                             is  preceded  by  an asterisk (*) to
                             aid in locating them.


         skiprc
                             When the skiprc toggle is TRUE, TEL-
                             NET  skips  the reading of the .tel-
                             netrc file in the user's home direc-
                             tory  when  connections  are opened.
                             The initial value for this toggle is
                             FALSE.


         termdata
                             Toggles the display of all  terminal
                             data  (in  hexadecimal  format). The
                             initial value  for  this  toggle  is
                             FALSE.


         verbose_encrypt
                             When  the  verbose_encrypt  flag  is
                             TRUE,  TELNET  prints  out a message
                             each time encryption is  enabled  or
                             disabled. The initial value for this
                             toggle is FALSE.

         ?
                             Display the legal toggle commands.



     environ argument...
         The environ command is used to manipulate variables that
         may  be sent through the TELNET ENVIRON option. The ini-
         tial set of variables is taken from the  users  environ-
         ment.   Only  the  DISPLAY  and  PRINTER  variables  are
         exported by default. Valid  arguments  for  the  environ
         command are:

         define variable value
             Define variable to have a value of value. Any  vari-
             ables  defined  by  this  command  are automatically
             exported. The value may be  enclosed  in  single  or
             double  quotes,  so  that  tabs  and  spaces  may be
             included.


         undefine variable
             Remove variable from the list of  environment  vari-
             ables.


         export variable
             Mark the variable to be exported to the remote side.


         unexport variable
             Mark the variable to not be exported  unless  expli-
             citly requested by the remote side.


         list
             List the current set of environment variables. Those
             marked  with  an asterisk (*) will be sent automati-
             cally. Other variables will be sent only  if  expli-
             citly requested.


         ?
             Prints out help information for the environ command.



     logout
         Sends the telnet logout option to the remote side.  This
         command  is  similar to a close command. However, if the
         remote side does not support the logout option,  nothing
         happens.  If,  however, the remote side does support the
         logout option, this command should cause the remote side
         to  close the TELNET connection. If the remote side also
         supports the concept of suspending a user's session  for
         later  reattachment,  the logout argument indicates that
         the remote side should  terminate  the  session  immedi-
         ately.

Files
     $HOME/.telnetrc
                        file that contains commands  to  be  exe-
                        cuted before initiating a telnet session

Attributes
     See attributes(5) for descriptions of the  following  attri-
     butes:



     tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)  ATTRI-
     BUTE TYPEATTRIBUTE VALUE _ Availabilitynetwork/telnet

See Also
     rlogin(1),   sh(1),   stty(1),    getlogin(3C),    hosts(4),
     krb5.conf(4),    nologin(4),   telnetrc(4),   attributes(5),
     inet(7P), inet6(7P)

Diagnostics
     NO LOGINS: System going down in N minutes
         The machine is in the process of  being  shut  down  and
         logins have been disabled.

Notes
     On some remote systems, echo has to be turned  off  manually
     when in "line by line" mode.


     In "old line by line" mode, or LINEMODE, the terminal's  EOF
     character is only recognized (and sent to the remote system)
     when it is the first character on a line.


     The  telnet  protocol  only  uses  single  DES  for  session
     protection-clients  request  service tickets with single DES
     session keys. The KDC must know that host service principals
     that  offer the telnet service support single DES, which, in
     practice, means that such principals must  have  single  DES
     keys in the KDC database.
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