In computer science, a firewall is a piece of hardware and/or software which functions in a networked environment to prevent some communications forbidden by the security policy, analogous to the function of firewalls in building construction. A firewall is also called a Border Protection Device (BPD), especially in NATO contexts, or packet filter in BSD contexts. A firewall has the basic task of controlling traffic between different zones of trust. Typical zones of trust include the Internet (a zone with no trust) and an internal network (a zone with high trust). The ultimate goal is to provide controlled connectivity between zones of differing trust levels through the enforcement of a security policy and connectivity model based on the least privilege principle.

Proper configuration of firewalls demands skill from the administrator. It requires considerable understanding of network protocols and of computer security. Small mistakes can render a firewall worthless as a security tool.

     source - Firewall (networking). (2006, September 2). In Wikipedia, The Free Encyclopedia. Retrieved September 3, 2006, from http://en.wikipedia.org/wiki/Firewall_%28networking%29

Hautspot's AP's and gateway devices include built-in firewall software which may be configured to tightly restrict wireless traffic. In addition, network policies configured on our central control server and related specifically to a given captive portal configuration (hotspot venue) provide an additional layer of security. Typically, private networks which may share the same broadband connection as the hotspot or hotzone are cordoned off from the wireless network. Specific hardware or specific users may be granted access to the private network(s). Our experienced network engineering team will work with you to determine your particular needs and custom tailor firewall rules to fit your scenario.