Is it possible to prevent denial-of-service (DoS) attacks from affecting an enterprise network? If so, what are...
the best strategies for DoS attack prevention?
In short: no. There is no way to completely defend the network from denial-of-service attacks, especially with the prevalence of botnet-driven distributed denial-of-service (DDoS) attacks on the internet today. It's extremely difficult to differentiate between a malicious request and a legitimate request because they often use the same protocols/ports, and they may resemble each other in content.
However, there are some steps you can take for how to prevent DOS attacks to reduce the risks such as the following:
- Purchase a lot of bandwidth. This may be the easiest solution, but it is also the most expensive. If an enterprise has tons of bandwidth, it makes perpetrating a DoS attack much more difficult, as it's more bandwidth that an attacker has to clog.
- Use DoS attack identification and detection techniques to help differentiate between legitimate and malicious traffic. The first step in reducing the damage of how to prevent DoS attacks is to reliably identify when an attack is under way; this can be done using activity profiling, which measures average traffic rates and flags significant increases in traffic. Being able to detect a DoS attack can also help organizations determine which kind of attack is underway, such as a DDoS attack or a domain name system amplification attack.
- Prepare for DoS response. The use of throttling and rate-limiting technologies can reduce the effects of a DoS attack. One such response mode stops all new inbound connections in the event of a DoS attack, allowing established connections and new outbound connections to continue.
How to prevent DoS attacks is more art than science, requiring a combination of techniques to limit the impact of such an attack on an organization. Good luck!
Learn more about how to handle email denial-of-service attacks
Find out more about defending against cloud denial-of-service attacks
Read about using a multipronged defense against denial-of-service attacks
Dig Deeper on DDoS attack detection and prevention
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