I've tried to setup a password-less ssh b/w A to B and B to A as well.
Generated the public and private key using ssh-keygen -trsa on both the machines.
Used the ssh-copy-id utility to copy the public-keys from A to B as well as B to A.
The passwordless ssh works from A to B but not from B to A.
I've checked the permissions of the ~/ssh/ folder and seems to be normal.
A's .ssh folder permissions:
-rw------- 1 root root 13530 2011-07-26 23:00 known_hosts
-rw------- 1 root root 403 2011-07-27 00:35 id_rsa.pub
-rw------- 1 root root 1675 2011-07-27 00:35 id_rsa
-rw------- 1 root root 799 2011-07-27 00:37 authorized_keys
drwxrwx--- 70 root root 4096 2011-07-27 00:37 ..
drwx------ 2 root root 4096 2011-07-27 00:38 .
B's .ssh folder permissions:
-rw------- 1 root root 884 2011-07-07 13:15 known_hosts
-rw-r--r-- 1 root root 396 2011-07-27 00:15 id_rsa.pub
-rw------- 1 root root 1675 2011-07-27 00:15 id_rsa
-rw------- 1 root root 2545 2011-07-27 00:36 authorized_keys
drwxr-xr-x 8 root root 4096 2011-07-06 19:44 ..
drwx------ 2 root root 4096 2011-07-27 00:15 .
A is an ubuntu 10.04 (OpenSSH_5.3p1 Debian-3ubuntu4, OpenSSL 0.9.8k 25 Mar 2009) B is a debian machine (OpenSSH_5.1p1 Debian-5, OpenSSL 0.9.8g 19 Oct 2007)
From A:
#ssh B
works fine.
From B:
#ssh -vvv A
...
...
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /root/.ssh/identity ((nil))
debug2: key: /root/.ssh/id_rsa (0x7f1581f23a50)
debug2: key: /root/.ssh/id_dsa ((nil))
debug3: Wrote 64 bytes for a total of 1127
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,gssapi,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/identity
debug3: no such identity: /root/.ssh/identity
debug1: Offering public key: /root/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey
packet, wait for reply
debug3: Wrote 368 bytes for a total of 1495
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /root/.ssh/id_dsa
debug3: no such identity: /root/.ssh/id_dsa
debug2: we did not send a
packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
[email protected]'s password:
Which essentially means it's not authenticating using the file /root/id_rsa.
I ran the ssh-add command in both the machines as well.
The authentication part of /etc/ssh/sshd_config file is
# Authentication:
LoginGraceTime 120
PermitRootLogin yes
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys
# Don't read the user's ~/.rhosts and ~/.shosts files
I'm running out of ideas.
Any help would be appreciated.
