http://personal-firewall.blogdrive.com/ firewall Mon, 03 Jan 2005 18:35:00 PST http://www.blogdrive.com Copyright 2005. Software Internet http://personal-firewall.blogdrive.com/archive/16.html Fri, 02 Jul 2004 01:46:18 GMT If you have been using the Internet for any length of time, and especially if you work at a larger company and browse the Web while you are at work, you have probably heard the term Firewall used. For example, you often hear people in companies say things like, "I can't use that site because they won't let it through the firewall." If you have a fast Internet connection into your home, you may have found yourself hearing about firewalls for your home network as well. It turns out that a small home network has many of the same security issues that a large corporate network does. You can use... (more) http://personal-firewall.blogdrive.com/archive/15.html Fri, 02 Jul 2004 01:44:50 GMT A Firewall is a set of related programs, located at a network gateway server that protects the resources of a private network from users from other networks. Basically, a firewall, working closely with a router program, filters all network packets to determine whether to forward them toward their destination. A firewall is often installed away from the rest of the network so that no incoming request can get directly at private network resources. There are a number of firewall screening methods. A simple one is to screen requests to make sure they come from acceptable (previously identified)... (more) http://personal-firewall.blogdrive.com/archive/2.html Thu, 01 Jul 2004 11:19:02 GMT A Firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. If an incoming packet of information is flagged by the filters, it is not allowed through. Let's say that you work at a company with 500 employees. The company will therefore have hundreds of computers that all have network cards connecting them together. In addition, the company will have one or more connections to the Internet through something like T1 or T3 lines. Without a firewall in place, all of those hundreds of computers... (more) http://personal-firewall.blogdrive.com/archive/3.html Thu, 01 Jul 2004 11:18:44 GMT Firewalls are customizable. This means that you can add or remove filters based on several conditions. Some of these are: IP addresses - Each machine on the Internet is assigned a unique address called an IP address. IP addresses are 32-bit numbers, normally expressed as four "octets" in a "dotted decimal number." A typical IP address looks like this: 216.27.61.137. For example, if a certain IP address outside the company is reading too many files from a server, the firewall can block all traffic to or from that IP address. Domain names - Because it is hard to remember the string of... (more) http://personal-firewall.blogdrive.com/archive/4.html Thu, 01 Jul 2004 11:18:28 GMT Designing a Firewall requires that you understand and identify the boundaries between security domains in your network. A network security domain is a contiguous region of a network that operates under a single, uniform security policy. Wherever these domains intersect, there is a potential need for a policy conflict resolution mechanism at that boundary. This is where firewall technology can help. The most common boundary where firewalls are applied today is between an organization’s internal networks and the Internet. When establishing an Internet firewall, the first thing you must decide... (more) http://personal-firewall.blogdrive.com/archive/5.html Thu, 01 Jul 2004 11:17:47 GMT It is necessary for us to approach the task of implementing a Firewall by going through the following steps: Determine the access denial methodology to use. It is recommended you begin with the methodology that denies all access by default. In other words, start with a gateway that routes no traffic and is effectively a brick wall with no doors in it. Determine inbound access policy. If all of your Internet traffic originates on the LAN this may be quite simple. A straightforward NAT router will block all inbound traffic that is not in response to requests originating from within... (more) http://personal-firewall.blogdrive.com/archive/6.html Thu, 01 Jul 2004 11:17:20 GMT Personal Firewall is a technology that helps prevent intruders from accessing data on your PC via the Internet or another network, by keeping unauthorized data from entering or exiting your system. Hackers don't just target national security organizations for cyber attacks: They want your tax returns, network passwords, or bank account numbers. And you don't want the FBI kicking in your door because someone hijacked your PC to participate in the latest denial-of-service attack on the Internet. Now that "always-on" broadband connections such as cable modems and digital subscriber line are... (more) http://personal-firewall.blogdrive.com/archive/7.html Thu, 01 Jul 2004 11:17:04 GMT If you work at a large corporation, odds are good that a Firewall sits between you and the outside world. But the increased availability of cable and DSL service means you could spend more time connected to the Internet from home--and more time as a potential target for hackers. You're somewhat vulnerable even on short dial-up connections. Unfortunately, most people become aware of the danger only after they become victims. With cyber attacks increasing, it is predicted that firewalls will be ubiquitous in five or six years. But you don't have to buy an expensive, hard-to-maintain security... (more) http://personal-firewall.blogdrive.com/archive/8.html Thu, 01 Jul 2004 11:16:47 GMT Surfing the Web seems similar to watching television, listening to the radio, or reading a magazine. The difference is that you joining the Internet and connecting to it makes your computer as accessible to others as any Web site that you visit. The two-way nature of the Internet can be misused by people who want to take control of your computer, look at your financial data, or delete your personal files. These intruders probably aren’t targeting you personally. Attacks are often launched by automated attack tools. Everyone who connects to the Internet using a broadband connection will be... (more) http://personal-firewall.blogdrive.com/archive/9.html Thu, 01 Jul 2004 11:16:27 GMT The Internet has made large amounts of information available to the average computer user at home, in business and in education. For many people, having access to this information is no longer just an advantage, it is essential. Yet connecting a private network to the Internet can expose critical or confidential data to malicious attack from anywhere in the world. Users who connect their computers to the Internet must be aware of these dangers, their implications and how to protect their data and their critical systems. Firewalls can protect both individual computers and corporate networks... (more)