From our Moodle host:

Good afternoon,

I am writing to notify you of a pending planned downtime to enable Remote-Learner’s technical support team to upgrade the configuration of your Moodle Private Cloud Service (MPCS).  Please be aware of the following:

• Planned downtime window for your site(s) is Saturday, May 4, 2013 - 3am to 7am EDT.

From Remote-Learner:

Dear Valued Client,

In the past few weeks, some of our clients have been the target of Distributed Denial of Service (DDoS) attacks. These attacks have led to outages for other clients who shared the same internet access points.
 
To help us detect and prevent this type of attack in the future, Remote-Learner needs to move a critical piece of security infrastructure.

Dear Valued Client,

In the past few weeks, some of our clients have been the target of Distributed Denial of Service (DDoS) attacks. These attacks have led to outages for other clients who shared the same internet access points.
 
To help us detect and prevent this type of attack in the future, Remote-Learner needs to move a critical piece of security infrastructure.