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Generate SSH without password authentication.

Posted on 14-Jun-2006 By Admin No Comments on Generate SSH without password authentication.

*******************************************************************************************Step by Step Implementation of key based authentications from Source A to Destination B. *******************************************************************************************

(1) At source A

(1-A) Generate a Key

ssh-keygen -t dsa

Sampe Output

posdbprod21->CIF@(/export/home/oracle/paresh)ssh-keygen -t dsa

Generating public/private dsa key pair.

Enter file in which to save the key (/export/home/oracle/.ssh/id_dsa):

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /export/home/oracle/.ssh/id_dsa.

Your public key has been saved in /export/home/oracle/.ssh/id_dsa.pub.

The key fingerprint is:

dd:0c:2d:29:87:d9:a1:fd:5c:fc:c1:e8:76:a2:93:25 oracle@posdbprod21

posdbprod21->CIF@(/export/home/oracle/paresh)

Above command creates a public key file called : id_dsa.pub and private key called id_dsa

(1-B) Cat id_dsa.pub to the destination B and save as a file called authorized_keys for ssh1 or authorized_keys for ssh2 in the .ssh directory of that login-id.

(2) At the source then create a file called config with the following contents

Host TARGET_IP_ADDRESS

User oracle

Compression yes

Protocol 2

RSAAuthentication yes

StrictHostKeyChecking no

ForwardAgent yes

ForwardX11 yes

IdentityFile /export/home/oracle/.ssh/id_dsa

Linux/Unix, shell

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