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Ssh passwordless authentication


 
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# 1  
Old 07-07-2015
Ssh passwordless authentication

Hey team

I have to enable password less authentication betweeen A to B server and A to C server and A to D server.

For this I generated a ssh key on server A using ssh-keygen command and copied the key using ssh-copy-id command to B, C and D server. Everything is working fine as of now but for confirmation is this approach ok
# 2  
Old 07-07-2015
? Its the only safe way I know when using ssh... What is exactly our question?
# 3  
Old 07-07-2015
It is.
ssh-copy-id is a shell script which is written to ease the distribution of keys on Linux systems (not sure about other operating systems).
Code:
user@server:~$ file /usr/bin/ssh-copy-id
/usr/bin/ssh-copy-id: POSIX shell script, ASCII text executable
....
# Shell script to install your public key(s) on a remote machine
# See the ssh-copy-id(1) man page for details
....

You can do that 'by hand' as well (same effect), there are some handy oneliners like
Code:
ssh user@server 'cat >> ~/.ssh/authorized_keys' < ~/.ssh/id_rsa.pub

# 4  
Old 07-07-2015
Thanks for your reply everyone.

The issue I am facing is that it works for sometime like for half an hour but after when I try to login again it asks for password
# 5  
Old 07-07-2015
You are saying that you can connect to server B from server A, and if you try it again you get password prompt ?

I would suspect someone is changing permissions on $HOME and .ssh folders.
They need to be per documentation, check out the section on the following link:

OpenSSH FAQ
# 6  
Old 07-09-2015
Thanks everyone.

This problem has miraculously solved on its own. I am not facing this issue anymore.

Regards
Sandy

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