What is a recursive DNS query?

One of the most important part of the Internet is the DNS; I guess that’s clear for everybody. DNS is a distributed database, the largest in the world but in — at least — one aspect is extremely vulnerable: recursive queries. We distinguish two type of DNS queries:

Iterative or non-recursive
Recursive

Each 13 root server is configured [...]

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Your PC became a DDoS client, what now?

DDos stands for Distributed Denial Of Service and is one of the, let’s say most powerful and popular attacking methods of hackers and hacker-wannabes. For DDoS, the offender needs a high number of clients. Clients are common users’ PCs, which have a special malware installed.
To install this malware, the users have to click a link [...]

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Stop an ongoing DoS attack

Many server managers say that effectively stopping a DoS attack is impossible. This is only half true.
Under a DoS siege the majority of the server administrators will try to create a null route for each offensive IP, IP block or even whole subnets. This is done as an effort to keep the service online for [...]

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How do you recognize a DoS attack

Early recognition of a DoS attack is essential. This post will help you learn how to recognize a DoS attack so you can take necessary steps.
In my previous post, I talked about DoS attacks in general (see end of the post for the link) and if you’ve read it, you know how are they working. [...]

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What is a DOS attack and how to initiate it

The best method to deflect an attack is to understand how the offender planed his attack, thus you know what will happen next or how to stop a previous action.
This post is about the basics of a distributed DOS attack. DoS is the abbreviation of Denial of Service. I won’t list everything you need, not [...]

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