Knowledge Base Toggle local menu Menus About the team. Knowledge Base Search. Log in. Options Help Chat with a consultant. Include archived documents. About firewalls A firewall is a system designed to prevent unauthorized access to or from a private network. Getting to know a little of history is to understand how challenges have been posed over time, and how market and businesses have adapted and transformed into an excellent business model for an increasingly interconnected world. Since the IP protocol has the ability to intercommunicate, leaving networks with different purposes or domains companies, universities etc.
So defending the perimeter is nothing more than creating a barrier that separates the public part of the interconnection offered by the internet, and operated by large telecommunications companies and local providers as well, in the private network segments. In computer networks, information travels through packets from one point to another.
Each packet is a unit that carries a portion of identification header and data content , being routed independently through the internet. DEC , marking, therefore, the first generation. This stage was marked as second generation of firewalls. In a short time, the third generation of firewalls appeared, when the commercialization of the DEC SEAL was started, counting on modern resources of application proxies. The combination of packet filtering and proxy in a single solution has made the hybrid firewall name begin to be more widely used in the market and academia.
In , Checkpoint launched Firewall-1 that was extremely important for the development and maturation of the security market, pioneering the GUI Graphic User Interface concept, as well as other technologies directly related to security.
In the second half of the s, several parallel projects appeared, such as Squid and Snort that had as their main purpose not commercialization but the development and maturation of solutions and concepts over time.
These projects have, to this day, great use by commercial and free security solutions. At the same time, other companies emerged, and other security features were added to the solutions, making them increasingly hybrid. Network technology was moving, fast. Therefore, the manageability of a firewall could not be overlooked as a key market driver for the eventual winner in this market.
User experience and Usability were key components then and still are today and the 3 layers that mattered for customers became: Security, Performance and Usability. At the time, the Check Point GUI dominated overall and the reason for its supremacy was down to some key management capabilities.
The graphical rule editor meant it was no longer necessary to know CLI syntax to create a rule and instead a few clicks with the mouse and the changes were created. What was revolutionary about this was it offered multiple objects per column which made each rule more powerful and allowed the editing of existing rules instead of having to create new ones.
Before this, access control lists only supported a single source, single destination and single service in the respective column. Many of the policy editor features were asserted on another advancement, the central object repository.
By creating a central object repository, only the object needed to be updated when a host changed its IP address, the policy would automatically reflect the update since the policy used a reference to the stored object. Additionally, it was now possible to create groups of these objects to enable reuse of common groups of objects throughout the policy.
This was a significant step forward for more effective policy management. Despite the manageability functions, Firewalls were far from perfect and they had their fair share of obstacles to overcome. Blocking the wrong traffic was an extremely common problem, especially if a firewall was placed between two networks that had previously not been segmented.
This was the case for almost every new firewall deployed in the 90s.
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