Ever had that weird problem on AIX where your routing table has a second default gateway?

I had and this is how i fixed it. In my case when I changed a ip address and default gateway in smitty, the routing table ended up with TWO default gateways. This is bad news if your machine is a seperate vLAN or subnet and needs to communicate outside of this vLAN or subnet.

The example below shows the output of a netstat -rn. In it you can see two default gateways. One is correct 10.2.98.113 and the other 10.0.72.16 is incorrect.

Introduction

If you run an important server such as web server you should of course take regular off site backups. Now everyone knows that backups are a total pain to do manually and more often than not get forgotten. However, using linux cron you can automate this task easily and be more confident of your ability to recover should anything go wrong with your server and you need to restore. If you have a decent connection speed at your home or office you can program a QNAP 109 NAS to take care of this important task for you.

Backing up like this has the following benefits

If you need to backup your network device's running configuration, one of the most common ways to do this is via a TFTP server. There are various tftp solutions out there and this guide covers setting up a centos box on how to become a tftp server. There a few guides out there already but this one covers Centos 5 specifically.

Step 1.
You need to install the tftp-server service and the xinetd service software using yum.
The xinetd service is required as this controls the tftp server daemon.

To do this from the command line issue the command

Customising the Drupal 6 Search Form

The default search form or box in drupal is good - it is simple enough and works. However it is not clear how to alter the look and feel and the default "Search this Site" label.
This article describes how to do this. It assumes your search box is in part of your theme.

Step 1. Copy a file called search-theme-form.tpl.php from the modules/search/ directory into your themes directory.

For example if your theme is called mytemplate you should copy the file to the this directory

Introduction PostFix and Cyrus

Configuring Juniper Steel Belted Radius to grant exec and or enable access to Cisco IOS device

Scenario

Using the plug-in modular nature of PAM we can get a linux server to use RADIUS to authenticate users connecting via SSH. This guide tells you how to setup a Centos 5.2 server as your Radius "client" and Juniper Steel-Belted as your radius server authentication "server". We are going to use the pam_radius_module from free radius to provide the mechanism of authenticating ssh logins against a radius box.

For this example my environment consists of

A centos 5.2 radius client called "cyclone"
A Steel-Belted Radius server is called "turbo"
A username of dave

Using a client VPN IPSEC for remote access is a very good and is a widely used solution. However, it does require two things to work.

1. A VPN client

2. The correct IP protocol access.

This guide is designed to give instructions on how to build a basic working IBM VIO server. If like me you find the normally excellent IBM documentation sometimes lacking on this subject and you have not been on the IBM P-series Virtualisation seminar (I went after I had to build my first 24/7 production environment which is kind of too late! -by the way the seminar is recommended especially if you get it for free) this might help fill in the gaps!