Linux Firewall - Page 9 - Results from #160

Discover Firewalls News

Building Firewalls with iptables, Part 2

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Last week in Part 1 we began uncovering some of the mysteries of tables and chains, and how to build iptables rules. This week we will dig more into writing rules for basic firewalling, sharing an Internet connection, and scripting. . .

Anthony Pell
Jun 16, 2003

Turning the SEGA Dreamcast into a Linux firewall/router

This highly detailed 101-page how-to article provides the necessary background and procedures to turn a SEGA Dreamcast gaming console into a Linux-based software router with firewalling and virtual private networking capabilities. The article explains how to create the necessary toolchain for compiling both programs and the Linux kernel, and shows how, starting from scratch, you can build a Linux operating system that runs entirely in memory.. . .

Anthony Pell
Jun 12, 2003

Cracking The Great Firewall of China

That's the rallying cry of Bennett Haselton's advocacy group, Peacefire, founded to preserve the rights of young people to surf an unfiltered Web. The group's preferred method? Sabotaging the software ostensibly designed to protect kids. Haselton and his group may . . .

Anthony Pell
May 20, 2003

Web filtering for Smoothwall using squidGuard

Chris Lowth submits squidGuard describes itself as: "An ultrafast and free filter, redirector and access controller for Squid". In my experience, it is the ideal web filter for use with Smoothwall since it is lightweight and easy to set . . .

Anthony Pell
May 13, 2003

Configuring NFS under Linux for IPTABLES Control

When setting up IPTABLES firewalling for Linux systems running the NFS service (network file system), you hit the problem that some of the TCP/IP and UDP ports used by components of the service are randomly generated as part of the "SunRPC" mechanism. . .

Anthony Pell
May 09, 2003

PF: The OpenBSD Packet Filter

Packet Filter (from here on referred to as PF) is OpenBSD's system for filtering TCP/IP traffic and doing Network Address Translation. PF is also capable of normalizing and conditioning TCP/IP traffic and providing bandwidth control and packet prioritization. PF has been a part of the GENERIC OpenBSD kernel since OpenBSD 3.0. Previous OpenBSD releases used a different firewall/NAT package which is no longer supported.. . .

Anthony Pell
May 07, 2003

A Technique for Counting NATted Hosts

Johannes Faustus submits, Steven M. Bellovin (co-author of the classic and recently re-published Firewalls and Internet Security: Repelling the Wily Hacker) has an interesting paper on detecting NATs (Network Address Translation setups) and counting the hosts behind the NAT box.. . .

Anthony Pell
Apr 30, 2003

Running Linux and Netfilter on Nokia IP Series Hardware

Check Point Software Technologies has the largest market share of any firewall vendor with their Firewall-1 (FW-1) product, and Nokia manufactures several hardware appliances together with an operating system called IPSO to run FW-1. IPSO is based on FreeBSD, provides advanced . . .

Anthony Pell
Apr 24, 2003

HOWTO: Rolling Your Own Firewall

I've been hearing a lot of talk lately about firewall appliances and how much of a pain they can be to use. Many of them tend to be Windows-specific in various ways, or they don't have all the flexibility us Penguin-heads . . .

Anthony Pell
Apr 09, 2003

What CIOs Need To Know About New Firewall Tech

As recently as a few years ago, IT personnel were trained to harden their network perimeter, barring outsiders entirely. In contrast, today's security environment is far less clear-cut -- and the role of firewalls is expanding. . .

Anthony Pell
Jan 07, 2003

Security Year in Review: VPNs and Firewalls

Mirko Zorz submits With many new and improved products on the market, this has been a good year for designing VPNs and deploying firewalls. Here's an overview of happenings during 2002 with exclusive comments from David Flynn, Vice President . . .

Anthony Pell
Dec 18, 2002

Time For Everyone To Get Serious About Firewalls

There's nothing like getting a computer for Christmas - especially if it's somebody else's. If your machine's on the Internet, it's under near-constant attack from people who'd like to ''own'' it. And if some digital crook can read all of . . .

Anthony Pell
Dec 16, 2002

Vendors complete tougher ICSA 4.0 firewall tests

ICSA Labs, which provides one of the most important certifications firewall vendors strive for, said yesterday it has completed the first wave of tests of product against version 4.0 of its certification criteria, writes Kevin Murphy. For the first time, . . .

Anthony Pell
Dec 04, 2002

VPN, firewall sales expected to boom

Worldwide revenue from sales of VPN (virtual private network) and firewall hardware and software will grow by 31 percent from $668 million in the third quarter of 2002 to $874 million in the third quarter of next year, according to research released Wednesday by Infonetics Research. . .

Anthony Pell
Nov 21, 2002

Linux Embedded Appliance Firewall: v1.0 Released

LEAF is an easy to use embedded Linux network appliance for use in small office, home office, and home automation environments. Although it can be used in other ways, it's primarily used as a gateway/router/firewall for Internet leaf sites.. . .

Anthony Pell
Nov 15, 2002

Linux firewalls: IT Manager's top picks

Linux firewalls--it's one of the hot topics for CIOs and IT managers at the moment. ZDNet Australia takes a look at some of the options available for IT departments. Monitoring traffic, configuration glitches, and decisions about which firewall to opt for--they are all issues facing Australia's IT managers. Here we feature some tips, reports and analysis about Linux firewalls.. . .

Anthony Pell
Oct 15, 2002

Firewalls - back to basics

A firewall is software or hardware that sits between two networks -- typically, between your LAN and the Internet -- and allows some sorts of network traffic through while preventing others. It works by rules that you set, which define the . . .

Anthony Pell
Oct 09, 2002

Linux Firewall on out of date hardware: kernel 2.2 or 2.4?

An old PC can be the ideal platform to realize a network firewall based on Linux. The system configuration needs a bit of attention but it's not a difficult task to fulfill. The only doubt concerns which kernel version better suits . . .

Anthony Pell
Sep 26, 2002

Firewalls: The soft option

The threat of an external attack on the corporate network is now so great that companies need to consider a firewall. There is no excuse for failing to protect data on a network and there are plenty of options on the . . .

Anthony Pell
Jul 30, 2002

The Threat of Internet Worms

Worms are a major threat to the Internet. Their automatic nature makes them powerful and destructive. Using existing and evolving methods of propagation, it is likely that they will become increasingly more powerful. Solutions based on diligent application of patches or . . .

Anthony Pell
Jul 11, 2002

Linux Firewall - Page 9

Enhancing Network Security: NethSecurity 8.1 Release Overview

An Introduction to UFW, Ubuntu’s ‘Uncomplicated’ Firewall

The Open Source Firewall – IPFire 2.27 – Core Update 173 Released: What’s New?