Network related tutorials
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| Post date: October 29, 2007, 09:10 Category: Network Views: 5306 Comments |
| Tutorial quote: This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and keepalived on Debian Etch. The load balancer sits between the user and two (or more) backend Apache web servers that hold the same content. Not only does the load balancer distribute the requests to the two backend Apache servers, it also checks the health of the backend servers. If one of them is down, all requests will automatically be redirected to the remaining backend server. In addition to that, the two load balancer nodes monitor each other using keepalived, and if the master fails, the slave becomes the master, which means the users will not notice any disruption of the service. HAProxy is session-aware, which means you can use it with any web application that makes use of sessions (such as forums, shopping carts, etc.). |
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| Post date: October 22, 2007, 06:10 Category: Network Views: 5152 Comments |
| Tutorial quote: On some networks it’s impossible to use BitTorrent. For example, if you’re at work, school, or connected to Comcast or a public hotspot. But there’s an easy solution to overcome this problem. By using a secure connection (SSH), you can bypass almost every firewall or traffic shaping application. |
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| Post date: October 14, 2007, 15:10 Category: Network Views: 4258 Comments |
Tutorial quote: Backing up files on a regular basis is an integral part of administering your server.
One way is to download each and every file when you want to save them. However, rsync makes the task a lot easier as it only downloads files that have changed - saving time and bandwidth. |
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| Post date: September 15, 2007, 00:09 Category: Network Views: 6892 Comments |
| Tutorial quote: This guide shows how to install and configure Smokeping on Debian Etch to monitor network latency. From the Smokeping web site: "SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection." |
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| Post date: August 26, 2007, 23:08 Category: Network Views: 4584 Comments |
| Tutorial quote: This document describes how to set up Hyperic HQ on Ubuntu 7.04. The resulting system provides an awesome, web-based "Systems-Management-Software". It is the next stage of classical monitoring and able to manage all kinds of operating systems, web servers, application servers and database servers. |
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| Post date: July 30, 2007, 23:07 Category: Network Views: 4339 Comments |
| Tutorial quote: Basically, tcptrack is a sniffer which will show the information about TCP connections on a specific interface. tcptrack will watch all the connections that occur and show the information in a nice interface. |
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| Post date: July 5, 2007, 00:07 Category: Network Views: 6738 Comments |
| Tutorial quote: Bonding is the same as port trunking. In the following I will use the word bonding because practically we will bond interfaces as one. Bonding allows you to aggregate multiple ports into a single group, effectively combining the bandwidth into a single connection. Bonding also allows you to create multi-gigabit pipes to transport traffic through the highest traffic areas of your network. For example, you can aggregate three megabits ports into a three-megabits trunk port. That is equivalent with having one interface with three megabytes speed. |
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| Post date: May 28, 2007, 22:05 Category: Network Views: 4148 Comments |
| Tutorial quote: The life of a systems or network administrator requires us to maintain an expansive understanding of our network infrastructure to more effectively manage it. Amidst volumes of complex data that some IT problems present and network management is no exception to these complications. Visual tools allow us to better see trends and make sense of the macro view of our networks. Ntop, nBox, nProbe are just the right FOSS tools that can help us gain greater insight. |
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| Post date: May 19, 2007, 22:05 Category: Network Views: 4064 Comments |
| Tutorial quote: The quality of my VoIP phone calls suffered whenever I was downloading or uploading anything. This was irritating, especially for those calling me (I heard them better than they heard me). So I poked at Iproute2 and other howtos, especially with regard to VoIP traffic, but I couldn't find anything that worked well. After some playing around, I've found settings that were right for me: consistant VoIP quality, regardless of any activities on the wire. |
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| Post date: May 7, 2007, 06:05 Category: Network Views: 7272 Comments |
Tutorial quote: NFS was developed at a time when we weren’t able to share our drives like we are able to today - in the Windows environment. It offers the ability to share the hard disk space of a big server with many smaller clients. Again, this is a client/server environment. While this seems like a standard service to offer, it was not always like this. In the past, clients and servers were unable to share their disk space.
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