DDoS attacks are one of the most common threats to online services. In this article, we will show you how to effectively defend against them.
What is a DDoS attack?
A Distributed Denial of Service (DDoS) attack floods your server or network infrastructure with a massive volume of requests from many sources simultaneously. The goal is to make your services unavailable to legitimate users.
Basic protective measures
- Firewall rules — rate limiting at the network level.
- Geoblocking — blocking traffic from regions where your users do not come from.
- SYN cookies — protection against SYN flood attacks at the kernel level.
- Fail2ban — automatic blocking of IP addresses with suspicious behavior.
Advanced protection
For critical applications, we recommend using automatic DDoS protection that filters malicious traffic at network entry points. At OnlineFleska, basic DDoS protection is included with all plans.
When an attack is detected, we transparently notify you and all details — attack type, traffic volume and mitigation progress — are available in your admin panel.