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Enhance Security with Port Knocking PDF Print E-mail
Written by Khurram Shiraz   
Wednesday, 19 March 2008
In the field of IT systems security, concept of” port knocking” is relatively new. However with the passage of time, it is getting popular day by day among system and security administrators.

Port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of pre-specified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent the connection attempts to connect over specified port (s).

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Analyzing Malicious SSH Login Attempts PDF Print E-mail
Written by Christian Seifert   
Tuesday, 18 March 2008

Malicious SSH login attempts have been appearing in some administrators' logs for several years. This article revisits the use of honeypots to analyze malicious SSH login attempts and see what can be learned about this activity. The article then offers recommendations on how to secure one's system against these attacks.

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Database Security Explained PDF Print E-mail
Written by R. Koester   
Thursday, 11 August 2005
The most popular open source database for Linux, is MySQL. It's easy to install and configure, runs light, and is quite fast. You'll commonly see it harnessed to Apacheserving up site content and authenticating users and offering a tempting target to those with more time than sense or conscience.


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Mail Bombing : Theoretical Denial of Service Attack PDF Print E-mail
Written by |PaRiS|   
Monday, 02 May 2005
Mail "Bombing" is perhaps one of the oldest and certainly considered one of the "lamest", that is to say; ineffective and immature, methods of "attack" available to the would-be "script kiddie" or otherwise malicious user online. Simply dating back to the first time someone realised hundreds of irrelevant emails sent to someone else's inbox could be an extreme, and most importantly time wasting, annoyance. The theory behind the attack is relatively simple; flood your chosen targets inbox with as many junk emails as possible over a given time vector; for example an attacker may devote a few hours run time to sending the "bomb". In practise the attack is easily achieved with varying degree's of success by any number of specifically designed programs able to send thousands, if not tens of thousands, of emails on command over a relatively short space of time.


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DNS Common Abuses PDF Print E-mail
Written by Luminaire   
Thursday, 24 February 2005
DNS, or the domain name system is one of the core protocols on the internet. Without DNS we would all be stuck remembering the addresses of our favorite web and mail servers. While being a key part of the internet, DNS still remains out of view from the majority of internet users.

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Introduction to Denial Of Service PDF Print E-mail
Written by hakimkt   
Wednesday, 26 January 2005
In this paper I have tried to answer the following questions:

- What is a denial of service attack?
- Why would someone crash a system?
- How can someone crash a system.
- How do I protect a system against denial of service attacks?


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