Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Expect scripting telnet stop on bad username or password
Top Forums Shell Programming and Scripting Expect scripting telnet stop on bad username or password Post 302713477 by spacebar on Wednesday 10th of October 2012 08:55:20 PM
Old 10-10-2012
This is an example to try:
Code:
#!/usr/bin/expect
set timeout 1
set host     [lindex $argv 0]
set user     [lindex $argv 1]
set password [lindex $argv 2]

proc login {user password} {
  expect -re "(Login|login).*:.*"            { exp_send "$user\r"; exp_continue } \
         -re "(Password|password).*:.*"      { exp_send "$password\r"; exp_continue } \
         -re "(#|\$|>)"                       { return 0 } \
         eof                                 { puts "***Error connecting to($host)."; return 1 }
         timeout                             { puts "***Error connecting to($host)."; return 1 }
  }
}

spawn telnet $host
set login_results [login $user $password]

# If successful connection, continue, else exit denoting error occured.
if { $connect_results == 0 } {

  # Successful telnet session so exit with zero status
  exit 0
}
# Error connecting to host so exit with non-zero status
exit 1


There is another expect telnet example here:
Expect - Wikipedia, the free encyclopedia
Expect scripts for automatic login with telnet and SSH Sasha's weblog
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

username password in script

Can we write a script to telnet to a unix server from unix with the username and password hardcoded in the script?? something like ssh a@b -p password ??? (5 Replies)
Discussion started by: roshanjain2
5 Replies

2. UNIX for Dummies Questions & Answers

how to stop telnet access to AIX box

how do I remove telnet access to my AIX (5.3) machine? I just want people (admins) to connect to the box using ssh? Thanks. (2 Replies)
Discussion started by: johnbrickell
2 Replies

3. Shell Programming and Scripting

Webpage to Telnet via Perl and Expect: Telnet problem?

Somewhat long story: I have a simple Perl CGI script that uses Expect to Telnet to a device and grab some data, and then spits it back to Perl for display on the Webpage. This works for many devices I've tried, but one device just fails, it keeps rejecting the password on this device, only... (1 Reply)
Discussion started by: jondo
1 Replies

4. Shell Programming and Scripting

strange expect script behavior, or am i misunderstanding expect scripting?

Hello to all...this is my first post (so please go easy). :) I feel pretty solid at expect scripting, but I'm running into an issue that I'm not able to wrap my head around. I wrote a script that is a little advanced for logging into a remote Linux machine and changing text in a file using sed.... (2 Replies)
Discussion started by: v1k0d3n
2 Replies

5. Ubuntu

Ubuntu Server 810 Telnet ** I know its Bad.. But **

I have a real need to telnet into my new Ubuntu 8.10 server and have Googled my eyes out with ideas that don't work. I CAN telnet out of the server, but I CANNOT telnet into it (connection refused error). I have updated my resolv.conf file but its expert time. ANY IDEAS??? THANKS!!! I knew I was... (13 Replies)
Discussion started by: gbxfan
13 Replies

6. Shell Programming and Scripting

Not able to pass Username and Password in telnet session

I have created a shell script to telnet remote machine. Here is the problem I am not able to pass the login username and password to the telnet session. I have searched forum and got few other methods to achieve this. But I need to know what's wrong in the below script. username="root"... (2 Replies)
Discussion started by: uxpassion
2 Replies

7. Shell Programming and Scripting

Scripting help/advise on hiding/masking username/password

Hi, I currently have a UNIX script with a function that uses a username and password to connect to the database, retrieve some information and then exit. At the moment, am getting the username and password from a hidden plain text file and permission set to -r--------, i.e. read only to who... (1 Reply)
Discussion started by: newbie_01
1 Replies

8. Shell Programming and Scripting

Expect script - going in loops can't stop

Hi First of all I tried lot of forums to create my first expect script. But I am totally stumped at the last step. I am no Linux Admin or ever trained in Linux. I just tried to create the script logically History : I need to to change my password across lot of servers in Linux over ssh ... (4 Replies)
Discussion started by: radioactive9
4 Replies

9. Shell Programming and Scripting

Username and password

Hi I am new to using unix and am struggling with a script i am writing. What i am trying to do is get a user to enter a username, check the original file i created with username and pin to see if their is a corresponding entry. Next ask the user to enter the pin and see if this matches... (5 Replies)
Discussion started by: somersetdan
5 Replies

10. Shell Programming and Scripting

Passing username and password to a script running inside "expect" script

Hi I'm trying to run a script " abc.sh" which triggers "use.sh" . abc.sh is nothing but a "expect" script which provides username and password automatically to the use.sh script. Please find below the scripts: #abc.sh #!/usr/bin/expect -f exec /root/use.sh expect "*name*" send... (1 Reply)
Discussion started by: baddykam
1 Replies

LEARN ABOUT DEBIAN

fence_brocade

fence_brocade(8)					      System Manager's Manual						  fence_brocade(8)

NAME

       fence_brocade - I/O Fencing agent for Brocade FC switches

SYNOPSIS

       fence_brocade [OPTION]...

DESCRIPTION

       fence_brocade  is an I/O Fencing agent which can be used with Brocade FC switches.  It logs into a Brocade switch via telnet and disables a
       specified port.	Disabling the port which a machine is connected to effectively fences that machine.  Lengthy  telnet  connections  to  the
       switch should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions.

       fence_brocade  accepts  options	on the command line as well as from stdin.  fenced sends parameters through stdin when it execs the agent.
       fence_brocade can be run by itself with command line options which is useful for testing.

       After a fence operation has taken place the fenced machine can no longer connect to the Brocade FC switch.   When  the  fenced  machine	is
       ready  to  be  brought  back into the GFS cluster (after reboot) the port on the Brocade FC switch needs to be enabled. This can be done by
       running fence_brocade and specifying the enable action.

       Vendor URL: http://www.brocade.com

OPTIONS

       -a IPaddress
	      IP address of the switch.

       -h     Print out a help message describing available options, then exit.

       -l login
	      Login name for the switch.

       -n port
	      The port number to disable on the switch.

       -o action
	      The action required.  disable (default) or enable.

       -p password
	      Password for login.

       -S path
	      Full path to an executable to generate the password for login.

       -q     Quiet mode: print only error messages.

       -V     Print out a version message, then exit.

STDIN PARAMETERS

       agent = < param >
	      This option is used by fence_node(8) and is ignored by fence_brocade.

       ipaddr = < hostname | ip >
	      IP address or hostname of the switch.

       login = < param >
	      Login name.

       option = < param >
	      The action required.  disable (default) or enable.

       passwd = < param >
	      Password for login.

       passwd_script = < param >
	      Full path to an executable to generate the password for login.

       port = < param >
	      The port number to disable on the switch.

SEE ALSO

       fence(8), fence_node(8)

																  fence_brocade(8)
All times are GMT -4. The time now is 02:42 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy