802.11 Security - download pdf or read online

By Bruce Potter

ISBN-10: 0596002904

ISBN-13: 9780596002909

Mention instant networks, and the query of safeguard will quickly keep on with. it is not excellent that during spite of compelling enterprise arguments for going instant, many businesses are maintaining again as a result of safety matters. yet, whereas it really is actual that instant networks create safeguard matters that do not exist in stressed networks, the problems are usually not insurmountable. 802.11 Security indicates how one can plan for and effectively deal with protection stumbling blocks on your instant deployment. This authoritative publication not just explains the protection concerns, yet indicates you the way to layout and construct a your individual safe instant network.

802.11 Security covers the complete strategy of construction safe 802.11-based instant networks, specifically, the 802.11b ("Wi-Fi") specification. The authors supply particular insurance of safeguard matters distinct to instant networking, comparable to instant entry issues (WAP), bandwidth stealing, and the problematical stressed out an identical privateness part of 802.11. you will how one can configure a instant purchaser and to establish a WAP utilizing both Linux or loose BSD. you are going to additionally locate thorough info on controlling community entry and encrypting customer traffic.

Beginning with an advent to 802.11b normally, the publication can provide a huge foundation in concept and perform of instant safety, dispelling a few of the myths alongside the way in which. In doing so, they supply you with the technical grounding required to consider how the remainder of the publication applies in your particular wishes and occasions. subsequent, the booklet information the technical setup directions wanted for either the Linux and FreeBSD working structures. a number of the subject matters lined include:

  • Station safeguard for Linux, FreeBSD, Open BSD, Mac OS X and Windows
  • Setting Up entry aspect Security
  • Gateway safeguard, together with development Gateways, firewall principles, Auditing, etc.
  • Authentication and Encryption
  • FreeBSD IPsec shopper and gateway configuration
  • Linux IPsec patron and gateway configuration
  • 802.1x authentication

802.11 Security is a booklet whose time has come. while you are a community, protection, or structures engineer, or somebody drawn to deploying 802.11b-based platforms, you will want this publication beside you each step of the way.

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802.11 Security by Bruce Potter PDF

Point out instant networks, and the query of protection will quickly stick to. it isn't superb that during spite of compelling enterprise arguments for going instant, many businesses are preserving again due to defense matters. yet, whereas it truly is real that instant networks create safety concerns that do not exist in stressed out networks, the problems are usually not insurmountable.

Additional info for 802.11 Security

Sample text

2 Encryption Issues The IEEE selected 40-bit encryption because it is exportable under most national encryption laws. If the standard had only implemented 104-bit encryption, many vendors would not have been able to ship their WLAN products to other countries. Unfortunately, keys for 40-bit RC4 encryption can be found through exhaustive searching (brute force) on modern commodity PCs. A 40-bit key has just over a trillion possible values. A modern PC can search that range to find the secret key in a matter of an hour or two.

A malicious user associated to the same access point as you has a "clear shot" at your machine. A host-based firewall running on your station can shut down IP-based attacks attackers may launch against you: options IPFIREWALL This option enables the kernel-level firewall: options IPFIREWALL_VERBOSE options IPFIREWALL_VERBOSE_LIMIT=100 These options enable verbose logging for the firewall. This allows you to create a firewall ruleset that logs information about interesting packets to syslog. This logging leaves an audit trail that allows you to examine network activity on your machine.

If there is a pressing reason to run a specific service from a client, firewall rules need to be modified to allow traffic to that service. It is vital that any exposed services are run using up-to-date software. Outdated software with security vulnerabilities is the primary entry point for attackers. In addition, we'll discuss the use of static ARP to protect against layer 2 man-in-the-middle attacks. These attacks can lead to eavesdropping or manipulation of network sessions. The use of static ARP entries can prevent these attacks from succeeding, since the host will not modify its ARP table when it receives malicious information.

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802.11 Security by Bruce Potter

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