The first paper published on firewall technology was in 1988, when engineers from Digital Equipment Corporation (DEC) developed filter systems known as packet filter firewalls.
Esimene artikkel tulemüüri tehnoloogia kohta avaldati aastal 1988, kui insenerid Digital Equipment Corporationist arendasid filtersüsteeme, mida teatakse praegu paketifiltreerimistehnoloogiana.