We just received notification that Insight needs will be down to patch a defect. The system will be down from 10:00 PM until 2:00 AM on February 19, 2016.
The following is the information we received:
"A patch was released today to address the CVE-2015-7547 vulnerability that needs to be addressed immediately. We are rolling out the code tonight during the time window below and this requires a restart of each VM for the change to take affect. Window: 1am to 5am ET, February 19th, 2016"