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Configuring IPCop Firewalls: Closing Borders with Open by James Eaton-Lee, Barrie Dempster

By James Eaton-Lee, Barrie Dempster

This ebook is an easy-to-read advisor to utilizing IPCop in numerous diversified roles in the community. The e-book is written in a truly pleasant variety that makes this complicated subject effortless and a pleasure to learn. It first covers uncomplicated IPCop ideas, then strikes to introduce uncomplicated IPCop configurations, sooner than overlaying complicated makes use of of IPCop. This booklet is for either skilled and new IPCop clients. an individual drawn to securing their networks with IPCop - from these new to networking and firewalls, to networking and IT pros with past adventure of IPCop. No wisdom of Linux or IPCop is needed.

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Configuring IPCop Firewalls: Closing Borders with Open Source: How to setup, configure and manage your Linux firewall, web proxy, DHCP, DNS, time ... VPN with this powerful Open Source solution

This e-book is an easy-to-read consultant to utilizing IPCop in quite a few assorted roles in the community. The publication is written in a really pleasant sort that makes this advanced subject effortless and a pleasure to learn. It first covers uncomplicated IPCop strategies, then strikes to introduce uncomplicated IPCop configurations, prior to overlaying complex makes use of of IPCop.

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Additional info for Configuring IPCop Firewalls: Closing Borders with Open Source: How to setup, configure and manage your Linux firewall, web proxy, DHCP, DNS, time ... VPN with this powerful Open Source solution

Sample text

Almost always use Network Address Translation to provide connectivity to their clients, and IPCop uses it too. rfc=1918). RFCs, or Requests For Comment, while not technical standards, are "technical and organizational notes about the Internet (originally the ARPANET), beginning in 1969. org/, front page, November 20, 2005). For protocols, standards, and convention, they make an excellent first line of reference, although (often depending upon the authors and intended audience) they are usually fairly technical.

E. commences sending data) to another computer, and a server is any device that listens for such a connection in order to allow others to connect to it. Within the context of TCP/IP, all devices on a network are servers and clients, irrespective of whether or not they are specifically assigned the role of server (such as a corporate mail server) or client (such as a desktop computer). e. greater than 1024) port on the client. ) from the service port and to the (random) port on the client that was used as the source port for the initial connection.

Routers If a series of switches and hubs connect together our client devices in order to form a network, routers are, very simply, devices that connect those networks together (put another way, routers are the foundation of inter-networking). A small router (such as a 1700-series Cisco router) may link a branch office to a main office via an ISDN or broadband link, while at the other end of the scale, an expensive high-end router from Cisco, Juniper, or Nortel (or based on an operating system like Windows 2003 or Linux) may have several network links and be responsible for linking a smaller ISP with several larger ISPs it uses to connect to the internet backbone.

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