Firewalls have been around since the late 1980s, initially erected around network perimeters to control the flow of traffic, and protect data inside host computers. But computing has changed dramatically since Digital Equipment Corp. developed the packet filter firewall in 1988. “You need to be able to see into the actual content that’s flowing through your network,” NIST’s Murugiah Souppaya says. With today’s mobile devices being taken outside of the trusted network, most of our firewall capabilities have expanded.”]
Source: https://www.healthcareinfosecurity.com/evolution-firewall-a-3411