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

By James Eaton-Lee, Barrie Dempster

This e-book is an easy-to-read advisor to utilizing IPCop in numerous diversified roles in the community. The publication is written in a truly pleasant sort that makes this complicated subject effortless and a pleasure to learn. It first covers easy IPCop options, then strikes to introduce easy IPCop configurations, ahead of protecting complex makes use of of IPCop. This ebook is for either skilled and new IPCop clients. someone drawn to securing their networks with IPCop - from these new to networking and firewalls, to networking and IT execs with earlier event of IPCop. No wisdom of Linux or IPCop is needed.

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Extra resources 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

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Barrie has experience in the integration of network infrastructure and telecommunications systems requiring high caliber secure design, testing, and management. He has been involved in a variety of projects from the design and implementation of Internet banking systems to large-scale conferencing and telephony infrastructure, as well as penetration testing and other security assessments of business-critical infrastructure. James Eaton-Lee works as a Consultant specializing in Infrastructure Security; he has worked with clients ranging from small businesses with a handful of employees to multinational banks.

99 (one of Google's IP addresses). 0/16 address range, which are not valid for internet communications. 23 for the external address of your router, given to you temporarily by your ISP. 23 was the originating host, and rewrites the packet back again. Effectively, your clients are masquerading as the device attached to the Internet (or it is masquerading as them), and indeed, 'masquerading' is the technical term used for NAT in the iptables/netfilter firewalling components in Linux. Although the NAT process breaks some more complicated protocols, it is an extremely effective way of having many hundreds or thousands of devices online behind one internet-routable (public) IP address.

Com/support, selecting your book, clicking on the Submit Errata link, and entering the details of your errata. Once your errata have been verified, your submission will be accepted and the errata added to the list of existing errata. com/support. com> if you are having a problem with some aspect of the book, and we will do our best to address it.  Introduction to Firewalls In this chapter, we will introduce some firewalling and networking concepts in enough detail to provide a refresher to those who've encountered them already, but in as minimal a fashion as possible, since understanding networking concepts is not the focus of this book.

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