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Wireless Basics Finding Answers

January 25, 2009 3 comments

As a Linux user the best way to begin solving your wireless problems is to develop a basic understanding of how wireless fits into networking and to understanding the terminology describing wireless. These links are designed to also provide a number of examples of how to set up wireless on Ubuntu 8.10, Fedora 10 and Damn Small Linux. Those different examples cover just about all of the different options that you will see for wireless.

Here are a number of links that take you through the process of understanding how Linux Wireless can be set up and configured on several different Linux distros.

Helpful Wireless Links

Understanding Wireless

Network Relationship

Network Connections

Wireless Security

Wireless Router

Wireless Channels

Wireless Range

Fedora 10 Wireless

Ubuntu Wireless

Damn Small Linux Wireless

Wireless Tools

WiFi Radar

iwconfig

iwlist

Dealing With Content Spam

November 30, 2008 1 comment

EMail Spam is against the law, however, it still fills your inbox. However, content Spam, which is on the rise, is not technically against the law or at least has less liability for those who do it. As a result many of us are constantly cleaning forums and blogs from this kind of trash. This tutorial will help you deal with the majority of Content Spam.

1. Restrict Comments to Some Boards
You can usually turn some boards off from comments as they are not necessarily where you want people to place comments anyway. This may even take a redesign of your blog so that you have fewer boards where they post. True, this does not stop Content Spam, however, it does cause them to recognize that the forum or blog is under supervision and being watched.

2. Require a Review on New Accounts

This is one thing I found very useful. When a new account signs up one way to check them is to take the IP Address that they registered from and put that in the Google search. If they ar known Spammers you will see a whole list of links about people complaining about these known Spammers. Then just ban the IP Address, the email and the account forever.

3. Create a Firewall to Limit Access

I basically became so frustrated with Content Spam I reviewed almost 8 million IP Addresses and subnets and created a list of the most frequent offenders. This is a very aggressive list and it certainly has subnets that contain some innocent users, but I put this together to stop Spam…period.

If you are using a CPanel you can enter subnets like you see below in the Firewall Options.

deny

If you are using an iptables script you can add this section toward the top of the firewall:
You will need to create a file called /etc/rc.d/banned and list subnets one line at a time as you see in the example below.

#####################################################
# BLOCK COUNTRY ATTACKS #
#####################################################
BADIP=”/etc/rc.d/banned”
BANNED=$( grep -v -E “^#” $BADIP )
for ip in $BANNED
do
iptables -A FORWARD -p tcp -s $ip -j DROP
done

# Example banned file
113.10.10.0/20
113.11.12.0/20
114.0.0.0/8
115.0.0.0/8
116.0.0.0/8
117.0.0.0/8
118.0.0.0/8
119.0.0.0/8
121.0.0.0/8
189.0.0.0/8
190.0.0.0/8
194.0.0.0/8
200.0.0.0/24
201.0.0.0/24
217.0.0.0/24
24.0.0.0/8
58.0.0.0/8
66.0.0.0/8
71.0.0.0/8
78.0.0.0/8
77.0.0.0/8
79.0.0.0/8
81.0.0.0/8
82.0.0.0/8
83.0.0.0/8
84.0.0.0/8
85.0.0.0/8
86.0.0.0/8
88.0.0.0/8
92.0.0.0/8
93.0.0.0/8
94.0.0.0/8
99.0.0.0/8

Again, these subnets include some IPs that should not be in there but it is easier to ban a subnet than to create 750 lines of code for the 8 million addresses I reviewed. Use at your own risk.

Worse Case Scenario: What to do when Comment Spam gets out of control.
1. Stop All Comments
Once you stop comments you will see that there is no point for Spammers. You must only use this as a temporary situation as it will not fix anything, it only gives you time to adapt a new strategy.

2. Stop All New Accounts
Again, this is temporary. Place a message in the blog or forum telling people that it is temporary and then work on a permanent solution, most people will understand especially if you tell them that it is only for 48 hours, etc.

Categories: Uncategorized

November 12, 2008 Leave a comment

Add User on Ubuntu 8.10

This video depicts how to add a new user to your Ubuntu 8.10 Intrepid Ibex desktop

Categories: Uncategorized

How About an Open Source Library System?

November 4, 2008 Leave a comment

Working with school systems one thing you will notice in almost every case is a pathetic library…there is just not enough money for books. Each district has a budget for books which is often augmented by a Library Fair or some type of way of selling stuff to get money for the Library. But still there just is not enough money for kids to have books.

If you go to your local school and dig into the finances for the library you will see one of the greatest American Crimes. I found that the school system I was working with was paying twice as much money each year for a Library automation system than they provided for books! Can you believe this, kids loosing the opportunity to read so librarians have a scanner to read bar codes and a pretty screen to track book check outs. Ok….so you probably do need a check out system but the cost is not acceptable.

In rural areas kids do not have a town library, if they want to read books they access the school library. If fact in many small towns the school library is all there is for the people in that community as well. So for a small town a free library automation program is really a necessity.

Open Source does provide some interesting options for Library programs. The best one I found was the Evergreen Library System This system is a very full featured system that will do everything you need and is actively developed. If you want to get up to speed quickly you can download a VMWare image and have a library system running in a few hours. It has directions for compiling Evergreen, not for beginners, and it also has directions for Windows and Linux client setup. There are forums, documentation and chat for problems. It actually has more support than the former program that required you to pay for support.

Cost Comparison
I did the research for a small school system using an Open Source Library system like Evergreen and the school would save over $12,000 in 10 years. Doesn’t sound like much…well $12,000 in this school system for books would transform the lives of many young adults. I did the research for a bar code reader which will work with the system for only $150. The only real cost for the system is the time to learn how to set it up and learn how to use it.

Ubuntu 8.10 New Install Features

September 29, 2008 Leave a comment

The new Intrepid Ibex install provides several new features which will make it easier to install Ibex. One of those new features is a new interface for understanding how to do a “Manual ” installation. Most of the time the option “Guided” install is done because users are frustrated with how to create partitions correctly. The new interface is more graphical and intuitive which will help in the process.

The Ubuntu Intrepid Ibex install will be easier for most people using the new installer. See the full article Here

DragonFly BSD 2.0.1

September 28, 2008 Leave a comment

Belonging in the same operating system class, DragonFly BSD is based on the same Unix ideals and APIs as BSD and Linux. DragonFly forked from FreeBSD in 2003 and focused on re-writing most of the major kernel subsystems until 2007. Since then, DragonFly BSD has created and released HAMMER, a new file system that solved numerous existing issues and provided new capabilities to DragonFly BSD. HAMMER was included with the July, 2008 release of DragonFly BSD 2.0. DragonFly BSD is now focused on its ultimate goal, providing native cluster support in the kernel.
The 2.0.1 release of DragonFly was released yesterday, incorporating recent improvements to Hammer, including the new cleanup utility.

RIP Linux 6.8 (Recovery Is Possible)

September 28, 2008 1 comment

RIP Linux is a system designed for the purpose of booting, repairing, and when necessary rescuing your system. The lightweight tool fits on a CD-ROM or USB drive, takes 256 MB of RAM, and a 586 processor to run. RIP Linux 6.8 support a variety of different file types, contains several utilities for system recovery, and also has IDE/SCSI/SATA, RAID, LVM2, and Ethernet network support. Click Here for a complete description of RIP Linux 6.8

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