Paranoid Penguin - Linux Firewalls for Everyone
A couple years ago, Linux Journal named iptables its Security Tool of the year. It really is a remarkable achievement. If you're serious about network security, you'll want to explore iptables' power in much greater detail than we've done in this article, starting with the iptables(8) man page and progressing through the how-tos available on the Netfilter home page (see Resources).
Whether you use iptables to protect your laptop or your entire enterprise network, I hope you've found this introduction useful. Be safe!
Resources
The Netfilter home page, where you can find the most current iptables-related how-tos: www.netfilter.org
Home page for Firewall Builder, an object-oriented GUI for generating and managing rules for several different types of firewalls, including iptables: www.fwbuilder.org
The Shorewall (Shoreline Firewall) home page: www.shorewall.net
Suehring, S., and Ziegler, R. Linux Firewalls, 3rd edition. Upper Saddle River, NJ: Novell Press, 2005.
Home page for Firestarter, an iptables GUI: www.fs-security.com
Home page for the Guarddog iptables GUI: www.simonzone.com/software/guarddog
Mick Bauer (darth.elmo@wiremonkeys.org) is Network Security Architect for one of the US's largest banks. He is the author of the O'Reilly book Linux Server Security, 2nd edition (formerly called Building Secure Servers With Linux), an occasional presenter at information security conferences and composer of the “Network Engineering Polka”.
- « first
- ‹ previous
- 1
- 2
- 3
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Sponsored by AMD
Built-in forensics, incident response, and security with Red Hat Enterprise Linux 6
Every security policy provides guidance and requirements for ensuring adequate protection of information and data, as well as high-level technical and administrative security requirements for a system in a given environment. Traditionally, providing security for a system focuses on the confidentiality of the information on it. However, protecting the data integrity and system and data availability is just as important. For example, when processing United States intelligence information, there are three attributes that require protection: confidentiality, integrity, and availability.
Learn more about catching the bad guy in this free white paper.
Sponsored by DLT Solutions
| Designing Electronics with Linux | May 22, 2013 |
| Dynamic DNS—an Object Lesson in Problem Solving | May 21, 2013 |
| Using Salt Stack and Vagrant for Drupal Development | May 20, 2013 |
| Making Linux and Android Get Along (It's Not as Hard as It Sounds) | May 16, 2013 |
| Drupal Is a Framework: Why Everyone Needs to Understand This | May 15, 2013 |
| Home, My Backup Data Center | May 13, 2013 |
- RSS Feeds
- Dynamic DNS—an Object Lesson in Problem Solving
- Making Linux and Android Get Along (It's Not as Hard as It Sounds)
- Using Salt Stack and Vagrant for Drupal Development
- New Products
- A Topic for Discussion - Open Source Feature-Richness?
- Drupal Is a Framework: Why Everyone Needs to Understand This
- Validate an E-Mail Address with PHP, the Right Way
- What's the tweeting protocol?
- Tech Tip: Really Simple HTTP Server with Python
- Kernel Problem
1 hour 39 min ago - BASH script to log IPs on public web server
6 hours 6 min ago - DynDNS
9 hours 42 min ago - Reply to comment | Linux Journal
10 hours 14 min ago - All the articles you talked
12 hours 37 min ago - All the articles you talked
12 hours 41 min ago - All the articles you talked
12 hours 42 min ago - myip
17 hours 7 min ago - Keeping track of IP address
18 hours 58 min ago - Roll your own dynamic dns
1 day 11 min ago
Free Webinar: Hadoop
How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Some of key questions to be discussed are:
- What is the “typical” Hadoop cluster and what should be installed on the different machine types?
- Why should you consider the typical workload patterns when making your hardware decisions?
- Are all microservers created equal for Hadoop deployments?
- How do I plan for expansion if I require more compute, memory, storage or networking?




Comments
interesting
hmm that is interesting
GoCompare.com