SSH and FTP Slow Authentication, DBUS and Logind Restart

Fairly interesting Plesk Onyx, ProFTPD, DBUS and Logind scenario recently. Had a server sporadically terminating FTP sessions that were working fine previously. After verifying overall connectivity and firewalling were not the issue time to start diging through logs. While I could see the incomplete and terminated FTP sessions, there was nothing incredibly insightful as to why. Seeing the FTP daemon had been up & running without issues for almost two years I decided to just restart the ProFTPD service – sometimes stuff just needs to be kicked and if stuff was working before, that’s an easy step to eliminate before introducing ‘changes’.