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Network related tutorials

Debian

Wireless networking using the ndiswrapper module

Post date: June 4, 2006, 17:06 Category: Network Views: 5275 Comments
Tutorial quote: Getting wireless networking working with the ndiswrapper driver is fairly straightfoward if your card has an associated Windows driver. Here we'll look at getting wireless networking working for a Dell Inspiron 1300, you should be able to follow the recipe for most other wireless networking cards which are supported ndiswrapper.

ndiswrapper is a collection of utilities which essentially allows you to load and run a network card driver written for Microsoft Windows upon your Linux kernel. This means that a card which isn't supported natively may be used indirectly.
Ubuntu

Get your wireless card working in Ubuntu

Post date: June 3, 2006, 11:06 Category: Network Views: 4404 Comments
Tutorial quote: Okay so you have a wireless card that shows up in ubuntu but doesnt connect to any wireless network?

The reason the card shows up but doesnt work is because ubuntu is distributed with its driver (so it can recognize it) but not with its firmware (so it can USE it) for legal reasons.

However you can take the firmware out of the windows drivers and put them into ubuntu and make the card work
Follow these steps to get your wireless card working under ubuntu dapper 6.06
Unix+clones

Manage Apache Download Speed And Traffic Limits With mod_cband

Post date: June 2, 2006, 06:06 Category: Network Views: 3440 Comments
Tutorial quote: In this tutorial I will describe how to install and configure mod_cband on an Apache2 web server. mod_cband is an Apache 2 module which provides bandwidth quota and throttling. It solves the problem of limiting users' and virtualhosts' bandwidth usage. The current version can set virtualhosts' and users' bandwidth quotas, maximal download speed, requests-per-second speed and the maximal number of simultanous IP connections.
Unix+clones

How To Automate Spamcop Submissions

Post date: May 26, 2006, 07:05 Category: Network Views: 2946 Comments
Tutorial quote: Spamcop is a service which provides RBLs for mailservers in order to reject incoming mail from spammers.

Their philosophy is to process possible spam complaints from users. When they receive a certain amount of complaints during a time-period then they will blacklist the offender. This system is dependant on spam reporting from users. However, their submission process is not very user-friendly.

As I have said above, Spamcop is pretty much dependant on the user input. If no one submits and verifies spam, then they will have no blacklist. However that whole submission and verification process is a bit annoying. Why should I bother to actually submit spam to spamcop and have it verified? If I just delete it, that will take less time...

The human being isn't really made to do repeating things. This gets quickly boring and hence my idea to automate this submission and verfication process.
In this howto I will show you how I achieved that. All I do is just putting the spam into certain folders and our good old friend cron does the rest.
Debian

Squid site restrictions

Post date: May 26, 2006, 07:05 Category: Network Views: 2846 Comments
Tutorial quote: In the office I needed a way to block some websites permanently and others outside of break times. After looking at some inline solutions I realised that I could easily do what was needed with squid alone. Here's how.
Debian

Debian Sarge (3.1) with Ruby on Rails and Apache 2 with FastCGI

Post date: May 19, 2006, 18:05 Category: Network Views: 2810 Comments
Tutorial quote: This howto will step you through installing Debian (Sarge) with Ruby on Rails and Apache 2 with FastCGI managed with ISPConfig.
Unix+clones

How To Save Traffic With Apache2's mod_deflate

Post date: May 19, 2006, 18:05 Category: Network Views: 3271 Comments
Tutorial quote: In this tutorial I will describe how to install and configure mod_deflate on an Apache2 web server. mod_deflate allows Apache2 to compress files and deliver them to clients (e.g. browsers) that can handle compressed content which most modern browsers do. With mod_deflate, you can compress HTML, text or XML files to approx. 20 - 30% of their original sizes, thus saving you server traffic and making your modem users happier.
Debian

Routing mail messages to your mailserver efficiently

Post date: May 12, 2006, 12:05 Category: Network Views: 3049 Comments
Tutorial quote: If you control satellite systems which need to relay their mail through a centralized host for sending then you have several choices. Perhaps the simplest software to use is the nullmailer program.

In the past we've looked at setting up exim, postfix, and sendmail forwarding but if you're not expecting to send much mail, and you don't need much processing then running a full mailserver is probably overkill.

The nullmailer package is very simple to configure and install.
Debian

Samba ADS integration without Kerberos

Post date: May 7, 2006, 06:05 Category: Network Views: 2769 Comments
Tutorial quote: Aim: Allow Debian Sarge box to join ADS domain without using Kerberos and create user accounts on the fly. The resulting Debian system should work for NT Domain users for most or all services being offered, with the same username and password without having to type the domain in each time.
Debian

How To Set Up A Loadbalanced High-Availability Apache Cluster

Post date: April 28, 2006, 06:04 Category: Network Views: 3894 Comments
Tutorial quote: This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.
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