Network related tutorials
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Speedup DNS requests with a local cache |
| Post date: April 26, 2006, 09:04 Category: Network Views: 1121 Comments: 0 |
| Tutorial quote: One common server bottleneck is DNS lookups. Many common server tasks such as from looking up hostnames to write Apache logfiles and processing incoming mail require the use of DNS queries. If you're running a high-traffic system it might be useful to cache previous lookups. |
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How to configure a low-cost load-balanced LAMP cluster |
| Post date: April 25, 2006, 11:04 Category: Network Views: 4316 Comments: 0 |
| Tutorial quote: The ubiquitous Linux, Apache, MySQL, and PHP/Perl/Python (LAMP) combination powers many interactive Web sites and projects. It's not at all unusual for demand to exceed the capacity of a single LAMP-powered server over time. You can take load off by moving your database to a second server, but when demand exceeds a two-server solution, it's time to think cluster. |
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Ethernet Bonding Configuration in Debian |
| Post date: April 24, 2006, 19:04 Category: Network Views: 2194 Comments: 0 |
Tutorial quote: Ethernet bonding refers to aggregating multiple ethernet channels together to form a single channel. This is primarily used for redundancy in ethernet paths or for load balancing. This page refers in particular to performing ethernet bonding under linux, and so does not limit itself to discussion of 802.3ad Trunk Aggregation.
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Apache - Serving up the Web |
| Post date: April 11, 2006, 22:04 Category: Network Views: 3146 Comments: 0 |
Tutorial quote: The Apache Web Server is installed as part of the OpenBSD base system. This guide will help you configure the web server: (Apache 1.3.12 is released with OpenBSD 2.7 and 1.3.9 with OpenBSD 2.6)
To see how configurable the Apache/OpenBSD combination is we also look at allowing administrators to remotely review the server's status, we setup the system so we allow users on our system to have their own personal web-space. Of course, for the security counscious you probably want to turn some of these things off after you get things up and running. |
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Building a Linux supercomputer using SSH and PVM |
| Post date: April 11, 2006, 21:04 Category: Network Views: 1453 Comments: 0 |
| Tutorial quote: If you have a couple of old Linux boxes sitting around, then you've got the makings of a supercomputer. Dust them off, install Secure Shell (SSH) and Parallel Virtual Machine (PVM), and start your complex algorithms. |
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Majordomo Configuration |
| Post date: April 10, 2006, 18:04 Category: Network Views: 903 Comments: 0 |
Tutorial quote: Majordomo is a program which automates the management of Internet mailing lists. Commands are sent to Majordomo via electronic mail to handle all aspects of list maintenance. Once a list is set up, virtually all operations can be performed remotely by email, requiring no intervention upon the postmaster of the list site.
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Setting Up A Highly Available NFS Server |
| Post date: April 1, 2006, 05:04 Category: Network Views: 3763 Comments: 0 |
Tutorial quote: In this tutorial I will describe how to set up a highly available NFS server that can be used as storage solution for other high-availability services like, for example, a cluster of web servers that are being loadbalanced. If you have a web server cluster with two or more nodes that serve the same web site(s), than these nodes must access the same pool of data so that every node serves the same data, no matter if the loadbalancer directs the user to node 1 or node n. This can be achieved with an NFS share on an NFS server that all web server nodes (the NFS clients) can access.
As we do not want the NFS server to become another "Single Point of Failure", we have to make it highly available. In fact, in this tutorial I will create two NFS servers that mirror their data to each other in realtime using DRBD and that monitor each other using heartbeat, and if one NFS server fails, the other takes over silently. To the outside (e.g. the web server nodes) these two NFS servers will appear as a single NFS server.
In this setup I will use Debian Sarge (3.1) for the two NFS servers as well as for the NFS client (which represents a node of the web server cluster). |
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How To Install A Custom Iptables Firewall |
| Post date: March 31, 2006, 21:03 Category: Network Views: 2383 Comments: 0 |
| Tutorial quote: This guide is to show you how to edit your iptables if you're running on a server This guide info came from iptables rocks, but i edited a bunch of data to make it suitable for what i want it to do. |
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Setup your own VPN with IPCop and OpenVPN |
| Post date: March 30, 2006, 17:03 Category: Network Views: 5825 Comments: 0 |
Tutorial quote: I ’m a huge fan of IPCop. It’s a great firewall distro that makes administration a snap using a slick web interface. My goal was to use IPCop and an easy-to-use VPN client to allow access to my LAN while away from home.
I ended up going with the ZERINA OpenVPN addon for IPCop and the OpenVPN GUI for Windows.
If you’ve ever wanted full, secure, encrypted access to your LAN from any remote location, here is your guide.
Just follow these ten easy steps… |
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