Author Archives: Ajitabh
Interconnecting QEMU and VirtualBox Virtual Machines
Sometime back I came across VirtualBox, an excellent replacement for commercial Vmware. I installed few OSes in VirtualBox and found the performance pretty good. In my opinion the performance of Windows virtual machines is much better in VirtualBox, perhaps because … Continue reading
Setting Up A Local Yum Repository
Introduction Yum (Yello Dog Updater Modified) is a popular high level package management tool for RPM (Red Hat Package Manager) packages. RPM packages are used by several popular distributions based on Red Hat Linux. Some of these distributions are Red … Continue reading
Monitoring Lotus Notes/Domino Servers
Very recently I was asked to setup Nagios to monitor the Lotus Notes/Domino Servers. There were some around 500 plus servers across the globe. It was an all Windows shop and the current monitoring was being done using GSX, HP … Continue reading
Apache LDAP Authentication
mod_auth_ldap modules allows an LDAP directory to be used to store the database for HTTP Basic authentication. This document describes an example implementation in Red Hat Enterprise Linux 4. This document also applies to any Linux distribution in general, provided … Continue reading
Using SNAT for Highly Available Services
Problem Often network based services are restricted to a particular source IP address. A common example is SNMP. A good system/network administrator will restrict access to the SNMP daemon from a particular host, usually a central management server. Sometimes these … Continue reading