I found this in /var/log/secure. Does this mean the high ports are
blocked? (changed ip addresses and names for security reasons):
Apr 15 08:47:55 hostname sshd[28686]: Did not receive identification string
from 10.x.x.x port 48424
Apr 15 08:47:55 hostname sshd[28687]: error: maximum authentication
attempts exceeded for oracle from 10.x.x.x. port 48426 ssh2 [preauth]
Apr 15 08:47:55 hostname sshd[28687]: Disconnecting: Too many
authentication failures [preauth]
Apr 15 08:47:55 hostname sshd[28689]: error: maximum authentication
attempts exceeded for oracle from 10.x.x.x port 48428 ssh2 [preauth]
Apr 15 08:47:55 hostname sshd[28689]: Disconnecting: Too many
authentication failures [preauth]
On Thu, Apr 15, 2021 at 8:14 AM Chris Taylor <
christopherdtaylor1994@xxxxxxxxx> wrote:
Check /var/log/messages and /var/log/secure - it should tell you the
problem after a failed ssh authentication.
Often its going to be the permissions are too open on either/all:
Check:
$HOME
$HOME/.ssh
$HOME/.ssh/authorized_keys $HOME/.ssh/id_rsa
Permissions should be:
$HOME/.ssh = drwx------ (owner= full , none othter)
$HOME/.ssh/authorized_keys = -rw------ (owner read-write only)
$HOME/.ssh/id_rsa = -rw------ (owner read-write only)
Also make sure the OEM server is correctly resolving the correct host and
not going out to some other host you didn't expect.
Either way, /var/log/messages, /var/log/secure should tell you what the
problem is.
Chris
On Thu, Apr 15, 2021 at 8:58 AM Andrew Kerber <andrew.kerber@xxxxxxxxx>
wrote:
This one is kind of strange. I have tested ssh from the oem server to
the particular database server in question logged in as oracle, and it
works fine.
However, whenever I try to deploy an agent onto the new database server,
I get this error:
Connection to the SSH daemon (sshd) on the target host failed with the
following error : Too many authentication failures Connection to the SSH
daemon (sshd) on the target host failed with the following error : Too many
authentication failures Connection to the SSH daemon (sshd) on the
target host failed with the following error : Too many authentication
failures
Connection to the SSH daemon (sshd) on the target host failed with the
following error : Too many authentication failures
I have tested the credentials multiple times from oem and verified that
they are valid. I cant figure out what the issue is. Has anyone run into
this and have any ideas. My next step is probably to try the agent pull,
but I would really like to understand what is going on here.
Connection to the SSH daemon (sshd) on the target host failed with the
following error : Too many authentication failures
Connection to the SSH daemon (sshd) on the target host failed with the
following error : Too many authentication failures
--
Andrew W. Kerber
'If at first you dont succeed, dont take up skydiving.'
