802.11 Security by Bruce Potter

By Bruce Potter

Mention instant networks, and the query of safeguard will quickly stick with. it isn't dazzling that during spite of compelling company arguments for going instant, many businesses are conserving again due to protection matters. yet, whereas it truly is precise that instant networks create safety concerns that do not exist in stressed networks, the problems aren't insurmountable. 802.11 Security indicates how one can plan for and effectively deal with defense hindrances on your instant deployment. This authoritative publication not just explains the safety concerns, yet indicates you the way to layout and construct a your personal safe instant network.

802.11 Security covers the whole strategy of development safe 802.11-based instant networks, specifically, the 802.11b ("Wi-Fi") specification. The authors supply specific insurance of safeguard matters certain to instant networking, equivalent to instant entry issues (WAP), bandwidth stealing, and the complicated stressed out similar privateness component to 802.11. you are going to methods to configure a instant buyer and to establish a WAP utilizing both Linux or unfastened BSD. you are going to additionally locate thorough info on controlling community entry and encrypting buyer traffic.

Beginning with an creation to 802.11b typically, the publication provides a extensive foundation in conception and perform of instant safety, dispelling a number of the myths alongside the best way. In doing so, they supply you with the technical grounding required to contemplate how the remainder of the ebook applies in your particular wishes and occasions. subsequent, the ebook information the technical setup directions wanted for either the Linux and FreeBSD working structures. the various subject matters coated include:

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

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

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An attacker may be able to replay your authentication or your cookie to gain access to the same resources. Access to those pages and subsequent pages on the site should be accessed via HTTPS. The same advice goes for submission of credit-card information. Web traffic is not the only candidate for SSL protection. Many mail clients allow for some form of SSL access to mail stores including Netscape's Messenger and the console-based mail reader pine. The most popular access mechanism is IMAP over SSL.

Once Bob's signal has been detected as the stronger signal on antenna B, the AP will send and receive frames for the MAC address on antenna B. As long as Bob continues to send traffic to the AP, Alice's frames will be ignored. Figure 2-2. Attack against improperly provisioned diversity antennas If a client is not using WEP authentication (or an attacker has knowledge of the WEP key), then the client is vulnerable to DoS attacks from spoofed APs. Clients can generally be configured to associate with any access point or to associate to an access point in a particular ESSID.

This option allows you to accept packets by default. Allowing packets by default is a bad security practice. If the firewall rules are accidentally cleared or there is a mistake in your rules, a default policy of allowing traffic will leave you with an open system. " FreeBSD also allows for changing the default behavior of various network protocols. Most of these changes enhance the host's protection against denial-of-service attacks. options RANDOM_IP_ID The RANDOM_IP_ID option changes the ID field in IP packets randomly rather than sequentially.

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