A denial-of-service (DoS) or a distributed denial-of-service (DDoS) attack is an attempt to make a machine or network resource unavailable to users, and is intended to temporarily or indefinitely interrupt or suspend services to a host connected to the Internet.
Typical attacks involve saturating the target machine with external communication requests, such that the machine can no longer respond to legitimate traffic, or responds so slowly it is rendered unavailable. Such attacks usually lead to server overload.
The three most common methods of attack include:
If you deploy the Cloud Edge gateway with hardware switch chipset in Bridge Mode, only the High Security intranet security setting supports anti-DoS scanning for intranet traffic.
With the Balanced and High Speed intranet security settings, intranet traffic is not scanned.
All three intranet security settings support anti-DoS scanning on the external network.