Cloudflare processes 60 million HTTP requests per second, of which about 70% are TCP connections and about 30% are UDP/QUIC connections. Of these, only about 80% of data exchanges are actually ...

Last week we discussed ports in some detail. This week, even more detail. To understand how ports work and the ways they behave, we need to understand how TCP/IP functions. Ports are numbered from one ...

Distributed denial of service (DDoS) attacks are getting progressively more complex, with software-defined and cloud-driven infrastructures becoming tantalizing targets for threat actors relying on ...

The specific type of TCP attack used in the recent spate of DDoS efforts were TCP SYN-ACK reflection attacks. The last 30 days has seen a renewed increase in distributed denial-of-service (DDoS) ...

Cybercriminals appear to have finally figured out a way to launch highly effective distributed denial-of-service (DDoS) attacks using TCP amplification — something most attackers have typically ...

Part I of this article discussed tcpdump, a command-line utility that sniffs network traffic. Now let's see what it can do. Scenario 1: Established Telnet Connection Using tcpdump we can analyze the ...