Tutorial: Internet/Intranet firewall security-policy, architecture and transaction services

Authors:
Ray Hunt
Affiliations:
Department of Computer Science, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
Venue:
Computer Communications
Year:
1998

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Abstract

The development of Internet/Intranet security is of paramount importance to organisations that plan to gain the economic benefits from interconnection with the Internet. This paper commences by examining firewall policy, focusing on both network service access policy and firewall design policy. Various firewall architectures, ranging from simple packet filters through to screened subnets and proxy gateways, are then discussed. Finally, the various mechanisms by which transactions can be secured over the Internet/Intranet are covered. These include encrypted tunnelling, IPv6, point-to-point tunnelling protocol, secure sockets layer, secure electronic transactions and secure multipart Internet mail encoding.