Watchguard is a sponsor of SAGE-AU.
Traditional stateful packet inspection firewalls used to be about keeping the bad guys out, by only opening and forwarding certain ports for well-known applications. Port 80 for HTTP, 443 for HTTPS, and 25 for email were common. Network Address Translation (NAT) allowed the use of private network ranges (RFC1918) on the inside to communicate with some privacy to the outside. The policy from the local area network (LAN) to the internet was usually totally open. Companies would then use Web Security Gateways (Proxies), Intrusion Detection/Prevention (IPS), Gateway Anti-Virus devices, Email gateways and end-point anti-virus to protect their network and stop employees from wasting resources or creating security risks. Over time, services were added to the traditional firewall, like IPS or URL Filtering.