How to communicate two servers using SSH | RS DIGITECH

Steps to communicate two servers using SSH

To build communication between two servers using SSH, follow the four steps on both the servers to end a successful communication. 

On Server one:

Step 1: 

• First, create a user.

• Enter the password and retype it for confirmation.
• 
• Enter all values and continue with yes.
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Step 2:

• Make that add the user as a sudo user.
• 
• Add the content under user privilege specification.
• 
• Press these keys at a time, CTRL X + Y + Enter.

Step 3: 

• Change the sshd_config file for password Authentication.
• Replace "YES" in the place of "NO".
• 
• Now, Save and exit it.

Step 4:

On Server Two:

Just repeat the steps followed for server one on server two.

Server one: (172.31.10.155)

• Switch to the user.
• # su naresh
• ssh <privateIP_server_two>
• 
• Enter the user password.
• 
• Successfully logged into Sever two (172.31.4.50) with a password.
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• Now, exit from server 2.
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Steps for generating Passwordless Authentication:

To communicate two servers using SSH w/o password, follow the below instructions for successful password less authentication:

• Generate ssh-keygen for password-less interaction on servers.
• 
• 
• Change the directory into a user group.
• 
• Ssh-copy-id <privateIP_server_two>
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• Now, you can connect server two from server one using ssh without a password.
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Summary:

These two ways (i) Communicate 2 servers using SSH and (ii) Generating ssh-keygen for password-less authentication is explained with instructions, commands, and screenshots to make your work easier.