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[Solved] SSH key authentication problem


 
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Top Forums UNIX for Advanced & Expert Users [Solved] SSH key authentication problem
# 1  
Old 08-19-2013
[Solved] SSH key authentication problem

Hi All,

this is the very first time i am going to use SSH authentication. first i login to server@ and under this ..ssh directory of servera i used this following command:
Code:
ssh-keygen -t rsa -b 1024

and i had 2 files(bravo_dbtest and bravo_dbtest.pub) created respectively, further i copied the file to the .ssh directory of serverb and appended the file content of bravo_dbtest.pub to the authorized_keys of serverb.

but while connecting to the servers, it is still asking for password. what could be the possible reason of this. please suggest?
# 2  
Old 08-19-2013
It is most likely because system wont recognize your identity file. Use `ssh -i "path_to_private_key"` argument and it should solve the problem. Private key should be in ~/.ssh directory of the user you are connecting with. Make sure the files are readable as well. Could be wrong permissions on either of them.
# 3  
Old 08-19-2013
Quote:
Originally Posted by lovelysethii
but while connecting to the servers, it is still asking for password.
Not sure if this needs mentioning, but: you understand, that by what you did describe you can only log in to serverB coming from serverA, and only with the user you used on serverA to generate the key as the user on serverB you copied the public key to, don't you?

I suggest:

Create a directory "~/.ssh" for every user you want to use ssh (this is the default location for the identity files, so you won't have to use the "-i" switch).

Make the file mode for this directory "0700" and the files in there "0600", ssh can become picky about this, especially, if the files have to many privileges granted.

Make sure you have exchanged all the necessary keys: suppose you have "userA" and "userB" on each serverA and serverB. To make sure every user can connect to any other user each has to exchange his key with the three others: a key is only valid for one user/server combination to another user/server-combination, not even in the other direction.

I hope this helps.

bakunin
# 4  
Old 08-19-2013
i have checked everything, even permissions are same as suggested, but still i am prompted for password, not sure why??
# 5  
Old 08-19-2013
You can be asked for passphrase eventualy when creating key. Are you sure you did not add one? Have you tried the -i option I sugested before? Try with -vv option and maybe put the output here for us to see.
# 6  
Old 08-19-2013
Another possible reason: did you install and start the server daemon, sshd, on the target machine(s)?

I hope this helps.

bakunin
# 7  
Old 08-19-2013
no, i haven't done this. how to do this please suggest?

---------- Post updated at 04:43 PM ---------- Previous update was at 04:39 PM ----------

its, running

bash-3.2$ /usr/bin/svcs ssh
STATE STIME FMRI
online May_23 svc:/network/ssh:default

---------- Post updated at 05:42 PM ---------- Previous update was at 04:43 PM ----------

Could you please share your email id, so that i can share the document which i prepared for this, this doc. is containing all of the steps which i followed for ssh key authentication.

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