By Laura E. Hunter
The safety supplied through firewalls and VPNs is just as robust because the protocol principles and guidelines that you simply create. The options of "defense-in-depth" and "least privilege" are in simple terms holes on your perimeter ready to be exploited, until you could outline and keep protocol principles that permit basically the minimal protocols required to supply your considered necessary companies. This ebook presents primary info essential to configure firewalls and construct VPNs and DMZs to outlive the risks of modern net. The e-book incorporates a bonus bankruptcy from the better half site on utilizing airy to observe and research community site visitors. once you may well now think crushed by way of the numerous firewalls with a dizzying array of positive aspects, you'll suppose empowered via the data won from this booklet. This ebook covers the major firewall items. It describes in undeniable English what gains might be managed by means of a coverage, and walks the reader throughout the steps for writing the coverage to slot the target. due to their vulnerability and their complexity, VPN guidelines are coated in additional intensity with a number of suggestions for troubleshooting distant connections. items lined contain Cisco photographs Firewall, ISA Server 2004, fee element NGX, Juniper'?s NetScreen Firewalls, SonicWall, and Nokia.
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Additional resources for Firewall Policies And VPN Configurations
These internal threats came from disgruntled employees with privileged access who could cause a lot of damage. Attacks from the outside were not much of an issue since there were typically only a few, if any, private connections to trusted entities. Potential attackers were few in number, since the combination of necessary skills and malicious intent were not widespread. This group has grown in size and skill over the years as its members share information on how to break into systems for both fun and profit.
Therefore, you need to look at the criticality of your information and decide how much you’re willing to spend to secure that information. No one wants a security breach, but it would not make good business sense to spend $15 million to secure a network for a company that pulls in $5 million annually and doesn’t store sensitive personal data such as credit card numbers or medical records. That said, just because your company makes $5 million annually doesn’t mean that you shouldn’t look seriously at the criticality of your data, to be sure you don’t have excessive exposure.
NOTE Involving the directors in security managing will greatly improve the success of your security policy—not an easy task, but essential. They may need to be informed, for example, that having full and unfiltered Internet access poses a risk to the security of their business. qxd 8/25/06 10:52 AM Page 23 Network Security Policy • Chapter 1 Untrusted Networks The federation of networks that became the Internet consisted of a relatively small community of users by the 1980s, primarily in the research and academic communities.