1 I NTRODUCTIONThis chapter contains the following: What is the Internet Firewall? Internet Firewall Security Functions Internet Firewall FeaturesWhat is the Internet Firewall?The Internet Firewall is a firewall appliance which isinstalled between the LAN and the Internet access device,such as an OfficeConnect® LAN Modem. The InternetFirewall is a complete network security system with allhardware and software pre-installed. This allows it to act asa secure gateway for all data passing between the Internetand the LAN.The purpose of the Internet Firewall is to allow a privateLocal Area Network (LAN) to be securely connected to theInternet. You can use the Internet Firewall to: Prevent theft, destruction, and modification of data. Filter incoming data for unsafe or objectionablecontent. Log events which may be important to the security ofyour network.The Internet Firewall has either two or three Ethernet ports(depending on the model) which are used to divide thenetwork into separate areas. The Wide Area Network (WAN) port attaches to theInternet access device, for example, OfficeConnect LANModem, Cable Modem or SDSL Router. The Local Area Network (LAN) port attaches to the localnetwork through hubs and switches. LAN users haveaccess to Internet services such as e-mail, FTP, and theWorld Wide Web. However, all workstations and data
