If you've ever administered the enterprise collaboration software/wiki known as "Confluence" then you have most likely encountered it's issues with having SELinux enabled on the same machine. Any documentation on the confluence website points to completely disabling SELinux when installing Confluence and offers no remedies otherwise. Well for some of us, this just simply is not an option.

Many months ago when configuring a Barracuda Web Filter 310 I came across a "hidden" expert menu which provides extended options (some of which are not advertised by Barracuda Networks) which may be useful within your environment. To access this hidden menu you simply load up the admin interface on your Web Filter then click on the "Advanced" tab. Once the Advanced page displays, click in your location bar of your web browser and at the end of the URL listed add &expert=1 ..

In this blog entry I will outline the steps you need to take on your Cisco Router or Catalyst device to configure syslog logging.

If you are configuring a Cisco Router for syslog logging then please follow the steps below:

1. In order to ensure that logging is enabled, issue the logging on command.

Router(config)# logging on

2. In order to specify the Essentials server that is to receive the router syslog messages, issue the logging ip_address command. ip_address is the address of the server that collects the syslog messages.

Router(config)# logging 1.1.1.1

This blog entry Im writing with the intention of being short and to the point on how to backup your HPUX system. For additional information or more in depth options and so on, please consult the URLs listed at the bottom of this entry.

If you have root access to the machine then you can use the fbackup utility to backup your data. It is best to first boot the machine in single user mode so that no services are running and the bare minimum of processes are active because the fbackup utility will not back up files that are open or locked by any process.

If you have worked with AIX you may have come across the term HACMP (High Availability Cluster Multi-Processing). This is IBM's solution for high-availability clusters. One of the first things to understand about HACMP is heartbeating, which I will discuss in this blog post.

Extended Access Control Lists (ACL) control traffic by comparing the source and destination address of the IP packets to whichever addresses you have configured within the ACL. A standard ACL only compares the source address of the IP packet to whichever address is configured in the ACL and allows or denies it based on the ACL, the destination of the packet and the ports involved do not matter. A standard ACL also does not have the ability to filter based on the protocol type, whereas with an extended ACL you can filter IP, ICMP, TCP and UDP packets individually and specify specific ports.

A multimeter combines the functionality of measuring current, potential difference (voltage) between two points and resistance into a single instrument. I will outline some basic steps to using a multimeter to test for various things and then provide some useful URLs which provide visual aids and more detailed information.

How to test for voltage:

1. Select either AC volts or DC volts on your meter. Set the meter to the appropriate range for the voltage you expect to find (unless your meter has “auto range”). If you are unaware of the voltage, select the highest range and work down.

When meshing Linux machines into a Windows environment that is apart of an Active Directory Domain you will most likely run into the question "How do I join my samba client to the AD domain?". Well this can be easily answered and solved with a little bit of time and configuration on your Linux machine.

First make sure that an entry for your AD domain server resides the /etc/hosts file.

One of the most common questions I come across when people are using Cisco routers for the first time is the simple question of "How do I reset my router to it's factory default settings?". As most people do struggle with learning all the ins and outs of the Cisco IOS, the procedure to resetting a router is not hard at all.

First make sure that your router is using the 0x2102 configuration register. You can set it to this register by issuing the following sequence of commands:

Router# configure terminal
Router(config)# config-register 0x2102
Router(config)# end

This little blog post will first explain how to check the previous AIX Technology Level (TL) which was installed before an upgrade and then we will venture into how to rollback the AIX TL, or Service Pack, to a previous version.

After an upgrade has been performed you can only check the Technology Level (TL) that was installed previously if the TL fileset, or service pack, still exist on the system and this will be reported by the oslevel command with the –qs option, like so:

oslevel –qs