Without password via RSA algorithm problem

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1

hi All,

i need to connect(sftp) from serverA to serverB via rsa algorithm. But i can not success this.

i did like that:

On ServerA:

#ssh-keygen -t rsa

after running this command, "id_rsa" and "id_rsa.pub" files were generated. i checked.there is private key in id_rsa file and public key in id_rsa.pub file.

#ssh user@serverB mkdir -p .ssh
i checked that on serverB .ssh directory was generated.

#cat .ssh/id_rsa.pub | ssh user@serverB 'cat >> .ssh/authorized_keys'
i checked that public key had been sent to authorized_keys file which is in .ssh directory,serverB

but when i want to connect from serverA to serverB like that
on server A it asked me password:( i dont understand why

# sftp user@serverB
user@serverB's password

Are there any other way connect from one server to another server without password?

Thanks.

2

Set the permissions of .ssh directory and all the files to 640

3

i gave permission all files but it still ask me password.

---------- Post updated at 03:20 AM ---------- Previous update was at 03:19 AM ----------

as 777

4

That is the problem. It should not be given full permission. Please try

chmod -R 640 .ssh

5

i gave all files 640 permissions.
But when i write on ServerA:
sfpt user@serverB
Connecting to ServerB
The authenticity of host ServerB' can't be established.
RSA key fingerprint is 81:6a:2c:3a:54:39:51:26:b7:96:86:6e:e9:bf:ac:bb.
Are you sure you want to continue connecting (yes/no)?

i wrote yes and i can log in to serverB.
i quited and try again, still it asked me password.

Arent there any other way to connect from one server to another server without password ?

Thanx

6 
sfpt user@serverB
Connecting to ServerB

The problem is sftp. What happens when you log into ServerB using ssh?

7

same things.

are there any way log in to one server from another server without password?

8

Yes there is - using ssh or scp but not using sftp. It you want a utility that does all three, take a look at lftp.

9

Besides the files in .ssh, make sure your home dir and the .ssh dir don't have write permissions except for the owner. Also check /etc/ssh/sshd_config on the server to see if it has

PubkeyAuthentication yes