The safety device has undergone several modifications over the decades. In addition, new features and tools have been added to the firewall over the years.
Let's look at the firewall evolution timeline:
80s and 90s
The first generation of the firewall was born in 1989 at Digital Equipment Corp (DEC) and the proposal came from Jeff Mogul.
Three years later, in 1991, Steve Bellovin and Bill Cheswick of Bell Labs at AT&T developed the first concept that consolidated itself as the state packet filter, the stateful firewall, marking the second generation of security devices.
The third generation appeared shortly afterwards with the commercialization of DEC SEAL, which already included application resources: proxy services.
In 1994, Check Point launched Firewall-1, which significantly contributed to the development of digital security.
The Computer Network Specialists fix and decide various computer and software issues for its correctness. They might work in a help-desk set-up or be responsible for technical support to the organizational IT subdivision.
Later, in the second half of the 90s, other side projects were launched on the market, such as Squid (1996) and Snort (1998).
The purpose of this software was not to sell the product, but to develop the concept of digital security. These solutions are still available for free today.
Other more complete tools emerged in the 1990s, with new technologies added. It was at this time that VPN, webfilter, antivirus integration and other solutions were incorporated into the firewall.