Anti-CIV

There so many dangers waiting for your computer while browsing the internet. These are the purpose why there Internet security services that offers security for your computers. Why do you need firewalls? And how it works? Firewalls, most often used in big a company that requires the internet usage. If you have fast internet connect like of DSL connection, you need to have a firewall in order to have protect your company or your family from offensive sites as well as potential hackers.

A firewall is a barrier to keep destructive forces and dangers away from your property as well as your privacy. That is why it was called firewall. Its job is same to a real firewall that keeps fire from spreading from one area to another. A firewall is a program that filters the unwanted information that enters your connection. Flagged packets are not allowed to enter into your system. For example, a company with 400 computer units that are being used by 400 employees, can access the internet and unwanted sites, in order to protect your company and these computers you have to install a firewall in to your system. Having a firewall, only one person will be able to access directly the internet and you are doing this for security purposes. A firewall has a control with the internet usage from your network.

What methods do a firewall does to control the flow of unnecessary information through your system?
First off, the Packet Filtering, the small chunks of data is being scrutinized over a set of filters. Packets that were able to make will be sent to request to enter to the system while the others will be eliminated. While the Proxy Service, will be retrieved by the firewall and then will be sent to the requesting system and so on. The Stateful inspection is inspecting and comparing the information passing through the system. It checks whether the information entering are the same as on the trusted sites. If the information that is entering did not match with the trusted sites the information will be eliminated from the system.

Often, the computer that runs in a corporate setting or university will have limited access to the Internet, thanks to the blocking software installed. However, with a proxy server, you can navigate around this difficulty.

Quite often, the blocking or filtering software that will be used by the company will be the firewall. This usually consists of software (and sometimes hardware too), whose purpose is to detect the sites that the computer accesses on the Net. This is done through tracing of the IP address of the user’s PC. Aside from tracking though, others will have blocking capabilities built in.

This can make it very, very difficult if not impossible to go to these banned sites without getting caught or causing the system to crash altogether. A proxy server, however, can go around this easily.

There are a lot of these available on the Internet, but the real key to using them is an understanding of just what is going on. In simple terms, the server will cloak the user’s computer so that every time a blocked or banned site is accessed, the IP address, which is always requested by the host site and is detected by the firewall, is not shown and instead, the IP address of the server is used.

This is how the user evades detection from the filtering software. In other words, the proxy server will act like a filter itself.

All the information, files, pictures, etc that the user views on the banned website will be transmitted through the server, and then rerouted to the user. Even though the process may be complicated, the bottom line is that any trace of the user, from the IP address to cookies, will be removed and deleted.

It seems nowadays if you are not online, you don’t exist. It really does not matter what type of company you run, you should have an online presence to let your prospects and clients know about your company and services. When you decide to take the leap onto the Internet there are some precautions you should take. I have friends who say all the time, I really have nothing to hide or worry about. This may be true, but malicious users like to deface websites.Which
can ruin you and your businesses reputation.

This is a paper about firewalls protecting your company from outside threats and unauthorized access.

A firewall is a great start. Firewalls can be both hardware and software based. There are many different firewall vendors some of the bigger names are Cisco, Symantec, and Checkpoint. The difficult part is configuring the firewall. This is where many intruders bypass security, because the firewall is poorly configured.

I would like to mention that there are many Open Source programs and operating systems that offer great firewall software. I personally believe that OpenBSD has one of the most secure operating systems and firewall configurations if done right. FreeBSD also has firewall software, it is called IPTABLES. IPTABLES offers packet filtering, NAT and you can even change packets in Linux. I have to say you can do anything you want in Linux, because the source code is right there. It’s a beautiful thing. Linux also uses this; you can build a firewall with the old system sitting in your garage and two Linux compatible network cards.Linux can be hardened, this means to make the operating system more secure. I like the tool Bastille Linux its is developed by Jeff Beale.