Systems Management

While trying to track down possible causes for agents not checking in (an issue that seems to have resolved itself as mysteriously as it appeared), we have discovered that there are lots of firewall entries with an "incomplete" status. The machines generating the traffic seem to be elsewise working. Just curious at this point - but ultimately want to know if its a problem or normal traffic. The entries predate any apparent issues with client communication to/from the kbox. Any thoughts?