Macos – mac os x mavericks (10.9) location of ssh log

macmacos

I am looking for the location of the log file that shows failed + successful ssh logins. I am trying to determine any IP addresses to block.

The information will be in /var/log/system.log

In Lion and earlier versions of OS X, the file is /var/log/secure.log

~/.ssh/ permissions should be set 0700, and the contents should be 0600.

Also, permissions on ~/ must be 0755 or less; that is, it cannot be writable by any other users.

Check directory permissions

The ssh client needs to be able to write to files in the .ssh directory :

ls -ld ~/.ssh

If the permissions aren't correct then run this to fix them:

chmod 0700 ~/.ssh

Check file permissions

Check if the files in the .ssh directory have read-write permissions :

ls -l ~/.ssh

If they don't, run :

chmod 0600 ~/.ssh/*

Remove ACL flags

If the ssh client still cannot write to the folder, one needs to clear the ACL flags :

chmod -R -a# 0 ~/.ssh