Read e-book online Assessing Network Security PDF

By Kevin Lam, David LeBlanc, Ben Smith

ISBN-10: 0735620334

ISBN-13: 9780735620339

ISBN-10: 0735635773

ISBN-13: 9780735635777

Don’t watch for an attacker to discover and take advantage of your safeguard vulnerabilities—take the lead via assessing the kingdom of your network’s safeguard. This e-book promises complex community trying out concepts, together with vulnerability scanning and penetration trying out, from contributors of the Microsoft safeguard groups. those real-world practitioners supply hands-on assistance on find out how to practice protection tests, discover defense vulnerabilities, and observe acceptable countermeasures. The spouse CD beneficial properties time-saving instruments and scripts so that you can use to bare and support right safety vulnerabilities on your personal network.Sharpen and boost your safety evaluation talents, together with tips on how to: notice vulnerabilities and practice penetration assessments behavior and correctly record an IT defense audit locate hidden hosts by utilizing DNS, WINS, and NetBIOS Sweep your community to research community topology, latest hosts, and multi-homed structures make sure the prestige of ICP and UDP ports by utilizing port scanning realize and aid counter universal community threats, together with: struggle dialing, battle riding, and Bluetooth assaults Packet and community sniffing IP, e mail, and DNS spoofing Password cracking communique interceptions and ameliorations IDS and IPS attacker detection avoidance junk mail and different e mail abuses CD positive aspects: instruments for checking out electronic mail, databases, and internet servers Scripts for locating universal info leaks and different power defense matters entire book in PDF layout A notice concerning the CD or DVDThe print model of this ebook ships with a CD or DVD. For these clients paying for one of many electronic codecs during which this publication is out there, we're happy to provide the CD/DVD content material as a unfastened obtain through O'Reilly Media's electronic Distribution providers. To obtain this content material, please stopover at O'Reilly's site, look for the identify of this publication to discover its catalog web page, and click the hyperlink under the canopy snapshot (Examples, spouse content material, or perform Files). word that whereas we offer as a lot of the media content material as we're capable through loose obtain, we're occasionally restricted by means of licensing regulations. Please direct any questions or issues to booktech@oreilly.com.

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Extra resources for Assessing Network Security

Example text

When the final total cost was computed, one function totaled the number of products ordered. 5 and rounded it up to 1. Another function computed the total cost, using the original number I entered, but it rounded that number down to 0. So when the function multiplied the price of the product and the quantity, which was zero, the total cost was zero. Free stuff! The application designers and developers had made a very poor assumption about user behavior and one very silly downstream mistake which, in a production environment, could have led to serious losses to the company.

3 4 Part I Planning and Performing Security Assessments Role of Security Assessments in Network Security Most information security is handled from a defensive position. Network administrators attempt to secure information assets (workstations, servers, files, and passwords) from well-known and well-understood attacks. For example, the most elementary defense against attackers is the use of strong passwords. Weak passwords are the Achilles’ heel of network security. Everyone knows this; consequently, most networks that have any reasonable amount of security require passwords to meet minimum standards.

A machine is only as secure as the administrator is trustworthy. One constant on all networks is that you must trust the network administrators. The more administrative privileges an administrator account has, the more the administrator must be trusted. In other words, if you do not trust someone, do not give that person admin­ istrator privileges. From the standpoint of a pen tester, administrator credentials are particularly valuable because they are generally the ultimate asset. 7. Encrypted data is only as secure as the decryption key.

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Assessing Network Security by Kevin Lam, David LeBlanc, Ben Smith


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