Are there any hints how to check SSHD log?
Any hints how I can check sshd log? start sshd manually and add some -d options to get more verbose debug output. Unless you have something funky going on it should use the same keys and config it does when started properly Creating an answer based on the comments above, credit to @Prof. Moriarty and @Eye of Hell
Where can I find the SSH Auth failure log?
Unless you have something funky going on it should use the same keys and config it does when started properly Creating an answer based on the comments above, credit to @Prof. Moriarty and @Eye of Hell SSH auth failures are logged here /var/log/auth.log
Which is the default syslog facility for SSHD?
Default sshd syslog facility is AUTH, so it will be logged in syslog to /var/log/messages. Thanks for contributing an answer to Unix & Linux Stack Exchange! Please be sure to answer the question.
How to change SSHD logging file location on CentOS?
That isn’t the correct name for this file, and is likely the reason your logging is screwed up. Change the name of this file to /etc/rsyslog.conf and then restart the logging service. Default sshd syslog facility is AUTH, so it will be logged in syslog to /var/log/messages.
How to set Max ssh login attempts per connection?
Hence I used a combination of ssh configuration and firewall settings. With the following solution an attacker is allowed to produce exactly 3 fault logins in 2 minutes, or he will be blocked for 120 seconds. This will allow only 1 login attempt per connection. Restart the ssh server.
How long does it take for SSH server to block a login?
With the following solution an attacker is allowed to produce exactly 3 fault logins in 2 minutes, or he will be blocked for 120 seconds. This will allow only 1 login attempt per connection. Restart the ssh server. Block each IP address for 120 seconds which establishes more than three connections within 120 seconds.