The server suffered a DOS attack since 21:00 and the site was down. What is a DOS attack?
A denial-of-service attack (also, DoS attack) is an attack on a computer system or network that causes a loss of service to users, typically the loss of network connectivity and services by consuming the bandwidth of the victim network or overloading the computational resources of the victim system.
A DoS attack can be perpetrated in a number of ways. There are three basic types of attack:
1. consumption of computational resources, such as bandwidth, disk space, or CPU time
2. disruption of configuration information, such as routing information
3. disruption of physical network components
Linkshttps://en.wikipedia.org/wiki/DDOS