passwordless authentication of SFTP script

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# 1  
Old 01-11-2008
passwordless authentication of SFTP script

Dear All
I need to discuss about the problem which has been discussed so many times here. I need to transfer a file from server A to server B via passwordless SFTP script. By reading the threads on this topic here, I followed the below steps but still it's not working ..

Pls find the steps below:
a) Logged in Server An with user Id 'informat' and corresponding passowrd.Home directory is '/opt/informatica'

b) Created the keys in server 'A' with the following command.
/user/local/bin/ssh-keygen -t rsa

c) Copied the public key in file under /opt/informatica/.ssh directory of server 'A'

d) Copied the '' file to 'authorized_key' file in /opt/informatica/.ssh directory in serber 'B'

e) Grant 777 privileges to authorized_key file in server 'B'

f) Logged into server 'A' with 'informat' user ID

g) Executed the sftp command for server B
sftp informar@B

h) But it is still prompting for password, where as it should not be because of key based authentication. Can some one pls help me where am I going wrong ..

Thanks in advance
# 2  
Old 01-11-2008
Why did you give 777 permission to authorized_keys?!

Do this:

chmod 644 authorized_keys

Then retry.

# 3  
Old 01-11-2008
Thanks for your reply . I did the chmod 644, but still it's not working ..Smilie
Am just wondering whether this will be an issue. I had just 777 in order to give all privelges.
# 4  
Old 01-11-2008
With ssh, the trick is not to give more permissions, but to reduce them! If your .ssh directory or authorized_keys is writable for whole world, then it isn't exactly secure - so ssh will see that and ask you for password.

Check what are the permissions for .ssh directory on A and B. Make them 700 (if not done already) and retry.
# 5  
Old 01-11-2008
Originally Posted by rikxik
With ssh, the trick is not to give more permissions, but to reduce them! If your .ssh directory or authorized_keys is writable for whole world, then it isn't exactly secure - so ssh will see that and ask you for password.

Check what are the permissions for .ssh directory on A and B. Make them 700 (if not done already) and retry.
Also check the permissions on the homedirectory. Max is 775, better is 755.
# 6  
Old 01-11-2008
Thanks a lot for clarifying this to me. I check the permission of .ssh folder in both the server. they are 700 and the file on server A and authorized_key in sever B have permission 644.
But still it's prompting for password. Do I need to check some settings of Unix box also ..
# 7  
Old 01-11-2008
Hi pjottam
when u say home directory , do u mean the .ssh folder in both server 'A' and 'b' where and authrorized_key are residing in source and target respectivly.
If yes the permission of these folders are 700
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