Solaris 2.6 Archive Feature Story Safety from the Net Windows NT firewalls have taken the firewall market by storm. Like Fort Knox, your LAN contains your corporate treasure. And, like a fort, your LAN needs physical and administrative features in a layered defense. These security layers include firewalls, Web-caching proxy servers, and URL filters. Like gate guards, firewalls provide fine-grained protection by checking the authorization of each person and packet entering or leaving a secured area.
Internal redistribution reduces the traffic through the gate.
Proxy servers can also be used to block all other incoming traffic. URL filters are simply censors that let you control network-user access to specific Internet sites. Some newer products, such as Novell's Border Services, bundle several of these security services. Firewalls are typically found where a company's internal network meets the Internet. You can also deploy firewalls internally to protect sensitive areas of your network, such as financial and human resources systems.