·2 min read
Where the word firewall comes from
Before it filtered packets, a firewall was a literal wall — a fire-resistant barrier in buildings from the 1850s, then the iron bulkhead behind a vehicle's engine. The networking sense borrowed the metaphor in the late 1980s and was cemented by Cheswick and Bellovin's work at Bell Labs.
#firewall
#networking
#security
#history
#ai-assisted