Posts Tagged With ‘ddos’

1. Introducing DNS Hammer, Part 2: Auditing a Name Server’s Rate Limiting Configuration

   Introducing DNS Hammer, Part 2: Introducing a new tool Part one of the series discusses DNS reflection attacks and DNS rate limiting. This post shows how to use DNS Hammer to audit a DNS server’s rate limit configuration. A dedicated web site https://www.dnshammer.com offers the tool for download and instructions how to use it.

2. Introducing DNS Hammer, Part 1: DDoS Analysis – From DNS Reflection to Rate Limiting

   This article discusses DNS reflection, a technique used in DDoS attacks. DNS rate limiting can be used as mitigation against DNS reflection attacks. This paves the way to our new tool DNS Hammer. The program can help auditing a DNS server’s rate limiting configuration.

3. Firewall trouble

   A few days ago my connection(s) to the computing center suddenly degraded, meaning that I suddenly could not contact some of my servers anymore or only after waiting for sometimes minutes, while others worked fine. I checked the Icinga monitoring system and saw that everything was fine, except the firewall, which seemed to have a […]