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Fire wall fundamentals

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  • Written security policies exist to provide a high-level roadmap of what needs to be done to ensure that the organization has a well-defined and thought-out security strategy

    pdf11p chutieuchuathieulam 23-07-2010 94 9   Download

  • The ICF, now dubbed Windows Firewall, is a simple stateful firewall that is part of the Windows XP operating system. In essence

    pdf12p chutieuchuathieulam 23-07-2010 164 18   Download

  • Personal and desktop firewalls are frequently overlooked as security devices that should be implemented on a network.

    pdf2p chutieuchuathieulam 23-07-2010 74 5   Download

  • The closer you come to the resource that needs to be protected, the more intelligent and specific you can get in filtering traffic directed at that resource.

    pdf1p chutieuchuathieulam 23-07-2010 68 5   Download

  • One of my favorite quotes is from Sun Tzu's The Art of War: If you know the enemy and know yourself, you need not fear the result of a hundred battles.

    pdf8p chutieuchuathieulam 23-07-2010 51 5   Download

  • There is no shortage of motives behind the threats that attackers come up with. Perhaps the most dangerous motive is the conscious decision to break the law, typically in an effort to gain some financial or monetary gain.

    pdf2p chutieuchuathieulam 23-07-2010 81 7   Download

  • Virtual private networks (VPNs) are another feature that firewalls have quickly adopted. Firewalls, by the very nature of their placement in the network design, represent a natural device to provide termination for LAN-to-LAN and in some cases remote-access VPNs.

    pdf5p chutieuchuathieulam 23-07-2010 144 14   Download

  • Using Firewalls to Segment Internal Resources Perhaps the most overlooked implementation of a firewall is on the internal network.

    pdf4p chutieuchuathieulam 23-07-2010 72 5   Download

  • User Datagram Protocol (UDP) UDP is the polar opposite of TCP. Whereas TCP is connection oriented, reliable, and relatively complex, UDP is a connectionless, unreliable

    pdf3p chutieuchuathieulam 23-07-2010 175 53   Download

  • This through a simple example of troubleshooting a firewall configuration. Troubleshooting starts with the basic connectivity troubleshooting and escalates upward to more complex issues until the specific problem is identified

    pdf6p chutieuchuathieulam 23-07-2010 75 5   Download

  • One of many third-party antivirus/Internet security suites, Trend Micro's PC-cillin includes a personal firewall that you can use to protect the system

    pdf11p chutieuchuathieulam 23-07-2010 108 6   Download

  • Transmission Control Protocol (TCP) TCP is a connection-oriented transport mechanism that resides at Layer 4 of the OSI model.

    pdf5p chutieuchuathieulam 23-07-2010 123 11   Download

  • To paraphrase Shrek, the network perimeter is like an onion; it has lots of layers.

    pdf4p chutieuchuathieulam 23-07-2010 87 9   Download

  • There are two predominant firewall architectures, the single-firewall and dual-firewall architectures.

    pdf3p chutieuchuathieulam 23-07-2010 87 10   Download

  • No discussion of firewall and security tools is complete without a brief discussion regarding security-testing tools.

    pdf8p chutieuchuathieulam 23-07-2010 92 13   Download

  • Consequently, a firewall is only as effective as the firewall security policy (as opposed to the enterprise security policy) that dictates how the firewall will be used

    pdf3p chutieuchuathieulam 23-07-2010 93 10   Download

  • Act as an intermediary between hosts Cache data to reduce the time and external bandwidth required to service requests

    pdf2p chutieuchuathieulam 23-07-2010 102 10   Download

  • Protocols, Services, and Applications As mentioned, TCP/IP provides a mechanism to allow systems to communicate with each other across a network.

    pdf10p chutieuchuathieulam 23-07-2010 71 8   Download

  • As with configuring any firewall, administrators should develop a checklist that they can use during the installation and implementation of the PIX/ASA firewall in the network

    pdf2p chutieuchuathieulam 23-07-2010 78 11   Download

  • The PIX/ASA is a powerful stateful packet-inspection firewall with some basic application-inspection capabilities.

    pdf2p chutieuchuathieulam 23-07-2010 91 10   Download

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