The goal of the scanning phase is to learn more information about the target
environment and discover openings by interacting with that target
environment. This article will look at some of the most useful scanning tools
freely available today and how to best use them. During this process we'll
perform a number of scans.
Network sweeping - Basic technique used to determine which of a range of IP
addresses map to live hosts. Network tracing – A facility for tracing the
route of a computer that is connected to the Internet. Port scanning –
software application designed to probe a network host for open ports. OS
fingerprinting – analysis of the TCP/IP stack to determine target operating
system. Version scanning – Interacting with different ports to determine
protocols they speak and possibly the version of service listening on given
port. Vulnerability sca... (more)
Nessus is a vulnerability scanner program; it is free for personal use using
the nessus for home. They also have a nessus for business which requires a
fee. I will be discussing the nessus for home use and using it with the
popular metasploit framework. Acquire the latest release of nessus homefeed
Nessus-4.4.1-ubuntu1010_i386.deb and register for the activation code. Follow
the instructions listed in the document ion for installing with Ubuntu and
start to configure. Nessus daemon cant be started until nessus has been
registered and the plugin download has occurred.
$ sudo /opt... (more)
Intrusion detection tools that use the libpcap C/ C++ library  for network
traffic capture (such as Snort  and Tcpdump ) can output packet capture
information to a file for later reference. The format of this capture file is
known as pcap. By capturing packet data to a file, an investigator can return
later to study the history of an intrusion attempt – or to turn up other
important clues about clandestine activity on the network.
Of course, the traffic history data stored in a pcap file is much too vast to
study by just viewing the file manually. Security experts use spe... (more)
The purpose of this article is to describe some tools and techniques in
performing the planning, scoping, and recon portion of a penetration test. In
covering these tools and techniques the reader will learn how to use them to
find vulnerabilities in their organization and help improve security posture.
Some other names for this first phase of penetration testing are; OSINT (Open
Source Intelligence), Footprinting, Discovery, and Cyberstalking.
During reconnaissance we'll gather information from public sources to learn
about the target and try to find what is importan... (more)
The OpenSSL is based on SSLeay library developed by Eric A. Young and Tim J.
Hudson and licensed under an Apache-style license. OpenSSL has lots of
features but I will cover encoding, checksums, encryption, passwords and pass
Many Linux distributions have OpenSSL as part of the bundled packages and is
most likely located in /usr/bin. To find it on your system type:
$ which openssl
$ openssl version
OpenSSL 1.0.0a 1 Jun 2010
Versions may vary and currently openssl-1.0.0d Feb 8 is the current version.
Most of the examples that are found in this document sh... (more)