Why PieTTY echo login password as "*"? Post: 302545199

Sponsored Content

Top Forums UNIX for Dummies Questions & Answers Why PieTTY echo login password as "*"? Post 302545199 by vistastar on Sunday 7th of August 2011 10:27:52 AM

08-07-2011

Registered User

Quote:

I skimmed through the Authentication RFC (RFC 4252) again, and didn't see anything about negotiation of password echoing.

Also, there's a big difference between SSH and Telnet: as soon as you connect to a telnet server, it controls the connection and all output. So if the telnet server decided that you should see asterisks when entering the password, you will see them. If it decides you should see percent signs instead, you'll see those.

And no, when you're still authenticating in SSH, you don't have a terminal yet. You're connected to the SSH server, which usually runs as a daemon, and doesn't have a TTY associated. Only after successful authentication the connection is assigned a TTY (if the client requests one).

Agree with you. I read APUE in chapters about the terminal, It is really complex about TTY.
In experiments I find telnetd involks 'login' and assigns TTY to it, but sshd verifies passwords itself with no TTY.
But since I can communicate with sshd without a TTY, what does a TTY really do? What is the relationship between ssh client and the terminal emulator?

vistastar

View Public Profile for vistastar

Find all posts by vistastar

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

No utpmx entry: you must exec "login" from lowest level "shell"

Hi I have installed solaris 10 on an intel machine. Logged in as root. In CDE, i open terminal session, type login alex (normal user account) and password and i get this message No utpmx entry: you must exec "login" from lowest level "shell" :confused: What i want is: open various...

2. Shell Programming and Scripting

script that can give login password for "ssh" without involving STDIN

Hi Folks, I am writing a shell script that can logon to remote machine automatically. But, I am facing one problem. I am using "ssh" command in script and while login into remote machine it asks for passowrd and it stops for STDIN input for password. I want my script to supply password...

3. Shell Programming and Scripting

"sed" to check file size & echo " " to destination file

Hi, I've modified the syslogd source to include a thread that will keep track of a timer(or a timer thread). My intention is to check the file size of /var/log/messages in every one minute & if the size is more than 128KB, do a echo " " > /var/log/messages, so that the file size will be set...

4. Shell Programming and Scripting

Difference between using "echo" builtin and /bin/echo

So in my shell i execute: { while true; do echo string; sleep 1; done } | read line This waits one second and returns. But { while true; do /bin/echo string; sleep 1; done } | read line continues to run, and doesn't stop until i kill it explicitly. I have tried this in bash as well as zsh,...

5. UNIX for Dummies Questions & Answers

how to install "source" command!/ broken "login.cl"!

Hello, I am new to this forums and this is my first "asking help" message! i have 2 problems: 1- for unknown reasons the "source" command is not avalable in my system (UBUNTU). i can't either see it in my bin directory! 2- again for unknown reasons the "login.cl" file in the home...

6. Shell Programming and Scripting

ksh script that echo " please insert your name " and store the output to a login.log file.

Hello All Nice to meet you all here in this forum, it's my 1rst time here i'm asking about a little issue that i face i added a ksh script that echo " please insert your name " and store the output to a login.log file. the script is working fine with normal telnet but Xstart is not working...

7. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone...

8. AIX

echo $varibla | mail -s "subject" "xxx@xxx.com" not ruuning as expected

Hi Folks, As per the subject, the following command is not working as expected. echo $variable | mail -s "subject" "xxx@xxx.com" Could anyone figure it out whats wrong with this. I am using AIX box. Regards,

9. Shell Programming and Scripting

tcsh - understanding difference between "echo string" and "echo string > /dev/stdout"

I came across and unexpected behavior with redirections in tcsh. I know, csh is not best for redirections, but I'd like to understand what is happening here. I have following script (called out_to_streams.csh): #!/bin/tcsh -f echo Redirected to STDOUT > /dev/stdout echo Redirected to...

LEARN ABOUT SUSE

nwvolinfo

NWVOLINFO(8)							     nwvolinfo							      NWVOLINFO(8)

NAME

       nwvolinfo - Diplay info on NetWare Volumes

SYNOPSIS

       nwvolinfo [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -C ] [ -v volume ] [ -N ]

DESCRIPTION

       nwvolinfo displays information on a NetWare Server Volume.

       nwvolinfo  looks  up the file $HOME/.nwclient to find a file server, a user name and possibly a password. See nwclient(5) for more informa-
       tion. Please note that the access permissions of $HOME/.nwclient MUST be 600 for security reasons.

OPTIONS

       -h
	  -h is used to print out a short help text.

       -S server
	  server is the name of the server you want to use.

       -U user
	  user is the user name to use for login.

       -P password
	  password is the password to use for login. If neither -n nor -P are given, and the user has no open connection to the server,  nwvolinfo
	  prompts for a password.

       -n
	  -n should be given if no password is required for the login.

       -C
	  By default, passwords are converted to uppercase before they are sent to the server, because most servers require this. You can turn off
	  this conversion by -C.

       -v volume
	  The volume name to be used. Defaults to 'SYS'.

       -N
	  Display the information in numeric-only format for use in a pipe.

AUTHORS

       nwvolinfo was written by Jacek Stepniewski <cunio@gazeta.pl> based on utilities by Volker Lendecke.

nwvolinfo							     7/9/1996							      NWVOLINFO(8)