Setting Up and Debugging SSH Authorized Keys

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Find active SSH servers w/ ssh keys on LAN

Hi, I am trying to complete my bash script in order to find which SSH servers on LAN are still active with the ssh keys, but i am frozen at this step: #!/bin/bash # LAN SSH KEYS DISCOVERY SCRIPT </etc/passwd \ grep /bin/bash | cut -d: -f6 | sudo xargs -i -- sh -c ' && cat...

2. Shell Programming and Scripting

List of servers that are NOT authorized for password-less SSH

Hello friends, We have around 500 servers (HPUX, AIX and linux) and all of them need to be accessed from our management box (linux) via password-less ssh. Out of 500 around 150 servers are setup password-less. We need to setup password-less SSH for remaining servers. First we need to get the...

3. Solaris

help with SSH keys

Hello, I could use some help with my ssh keys and agent. This is the issue. I have 2 different UNIX systems at work. One is the normal Solaris servers with my uid being the same throughout all the servers. I now have a different system for my desktop. A contractor came in and installed some SUN...

4. OS X (Apple)

rsync and ssh keys help

Not specifically a mac question, but it's what I am using. I am setting up some replication for some file shares using rsync. The problem is that I am being given a little bit of a twist - I'm supposed to use a non-admin account to do it with. I have 2 boxes - Master and Slave with 1...

5. Shell Programming and Scripting

What are public keys in ssh and how do we create the public keys??

Hi All, I am having knowledge on some basics of ssh and wanted to know what are the public keys and how can we create and implement it in connecting server. Please provide the information for the above, it would be helpful for me. Thanks, Ravindra

6. UNIX for Dummies Questions & Answers

Problem setting up SSH keys between my laptop and a server.

This is probably somewhat trivial but it's driving me crazy. I have 6 servers with identical configurations. I'm trying to set up ssh keys between my laptop (windows XP using cygwin) and these servers (rhel). On 5 of the machines this works perfectly, but on one, no matter what I do, it gives me a...

7. UNIX for Dummies Questions & Answers

Cannot ssh into machine although it has entry in authorized keys

We rebooted one our servers, call it server A, and now it cannot ssh into another machine, call it server B. We have the server A's ssh signature in server B's authorized key. I tried to manually generate the a new key using ssh-keygen command but the key looks nothing like the old key: It has...

8. UNIX for Dummies Questions & Answers

SSH keys

Hi everyone, i wanted to generate ssh keys so that i can include the public key in the remote sever, so that for subsequent logins, i can do away with the keying in of the password. I consulted the man ssh-keygen man pages. "..Normally each user wishing to use SSH with RSA or DSA...

9. UNIX for Advanced & Expert Users

SSH Keys Help

Hello, I'm wondering if anyone has a step-by-step instruction set for setting up ssh keys? I've gone through many of the manuals online (most seem to be from the same source) and it's a little bit unclear when the documentation is talking about the server versus the client machine. I'm missing...

LEARN ABOUT DEBIAN

pam_ssh

PAM_SSH(8)						    BSD System Manager's Manual 						PAM_SSH(8)

NAME

     pam_ssh -- authentication and session management with SSH private keys

DESCRIPTION

     The SSH authentication service module for PAM, pam_ssh provides functionality for two PAM categories: authentication and session management.

   SSH Authentication Module
     The SSH authentication component verifies the identity of a user by prompting the user for a passphrase and verifying that it can decrypt at
     least one of the user's SSH login keys using that passphrase.

     The following options may be passed to the authentication module:

     debug		     syslog(3) debugging information at LOG_DEBUG level.

     use_first_pass	     If the authentication module is not the first in the stack, and a previous module obtained the user's password, then
			     that password is used to decrypt the user's SSH login keys.  If this fails, then the authentication module returns
			     failure without prompting the user for a passphrase.

     try_first_pass	     Similar to the use_first_pass option, except that if the previously obtained password fails to decrypt any of the SSH
			     login keys, then the user is prompted for an SSH passphrase.

			     try_first_pass has no effect if pam_ssh is the first module on the stack, or if no previous modules obtained the
			     user's password.

     allow_blank_passphrase  Allow SSH keys with no passphrase.

     If neither use_first_pass nor try_first_pass is specified, pam_ssh will unconditionally ask for an SSH passphrase.

     In addition to the above authentication procedure, all standard SSH keys (identity, id_rsa, id_dsa) for which the obtained password matches
     will be decrypted.

   SSH Session Management Module
     The SSH session management component initiates sessions by starting an SSH agent, passing it any SSH login keys it decrypted during the
     authentication phase, and sets the environment variables accordingly.

     The SSH session management component terminates the session by killing the previously started SSH agent by sending it a SIGTERM.

     The following options may be passed to the session management module:

     debug	     syslog(3) debugging information at LOG_DEBUG level.

INFORMATION LEAKS

     Be careful with the using the try_first_pass option when pam_ssh is the first authentication module because it will then leak information
     about existing users without login keys: such users will not be asked for a specific SSH passphrase, whereas non-existing users and existing
     users with login keys will be asked for a passphrase.

FILES

     $HOME/.ssh/identity
     $HOME/.ssh/id_rsa
     $HOME/.ssh/id_dsa	       OpenSSH DSA/RSA keys decrypted by pam_ssh.
     $HOME/.ssh/login-keys.d/  Location of (possibly symbolic links to) OpenSSH DSA/RSA keys used for authentication and decrypted by pam_ssh.
     /var/log/auth.log	       Usual log file for syslog(3)

SEE ALSO

     ssh-agent(1), syslog(3), pam.conf(5), pam(8).

AUTHORS

     Andrew J. Korty <ajk@iu.edu> wrote pam_ssh.  Dag-Erling Smorgrav wrote the original OpenPAM support code.	Mark R V Murray wrote the original
     version of this manual page.  Jens Peter Secher introduced the login-key concept.

BSD
								 November 26, 2001							       BSD

Solaris BigAdmin RSS