Cyber Attacks Explained: DNS Invasions
We often read about defaced websites whose pages get changed to some malicious content. How do hackers do it and how do we protect our infrastructure from them? This article is about how…
Guard Your Network with IPCop, Part 2: Add-ons
A basic installation of IPCop provides minimum firewall functionality such as a proxy, compatibility with various Internet connections, port forwarding, IPSec VPN, etc. To convert it into a complete Unified Threat Management (UTM)…
Cyber Attacks Explained: Network Sniffing
In earlier articles in this series, we have explored denial of service attacks and packet spoofing. This month, let us focus on a wider hacking approach called network sniffing, which is very commonly…
The Socket API, Part 5: SCTP
This article on socket programming deals with the Stream Control Transmission Protocol (SCTP). Similar to TCP and UDP, SCTP provides some features of both. It is message-oriented, and provides a reliable sequenced delivery…
The Socket API, Part 4: Datagrams
Let’s try to develop server clients using UDP, the protocol behind some important services like DNS, NFS, etc. UDP, the User Datagram Protocol, is a connectionless protocol. This means you don’t establish a…
Cyber Attacks Explained: DoS and DDoS
With this article, we begin a new series on the major kinds of cyber attacks that weaken the IT security infrastructure within organisations. With the rapid spread of Internet technologies and applications, the…
Creating Your Own Server: The Socket API, Part 1
In this series of articles aimed at newbies to network programming (knowledge of C is a prerequisite), we’ll learn how to create network clients and servers using the UNIX Socket API. We’ll start…
Advanced Nmap: A Recap
This final article in the series consolidates information from the previous articles, looks at NMap’s future possibilities, and at the new tools from the development team. Beginning its life as a simple port-scanner,…
Nessus with Metasploit — Track and Hack
Networks play an important role in a sysadmin’s life. But have you ever wondered about the security of your network, or tried to find out how vulnerable it is? Let’s discover how to…
Advanced Nmap: NMap Script Scanning
In previous articles, we have studied NMap in great detail, including live scanning a firewall and verifying the recommendations. Now, it’s time to study NMap script scanning. Nmap.org describes the Scripting Engine (NSE)…
May 21, 2013
Peter — Hi I followed the steps but on bootup of qemu it hangs at "Stopping configure virtual network devices, waiting for...
May 20, 2013
Aseem — can u just elaborate this part "edit the output file to include only the hash value. (It should only include...
May 19, 2013
raghu ram — Hi Anil, Your articles are awesome Please give some tutorials on PCI Sound Card drivers using ALSA.
May 18, 2013
MF Hussain — Best training center in bangalore for RHCE is Linuxlearningcenter they train only on REDHAT....
May 17, 2013
santosh yadav — hello everyone!
i am trying to do gpio access and encounter segmentation fault.
so to overcome it i will have to map...
