Citrix – Learning About The Linux VDA
As part of taking the new Citrix Virtual Apps and Desktops (CVAD) LTSR release out for a spin, today I decided to look at the Linux VDA again. It’s been a while since I tried it as my previous attempts weren’t successful but today I figured was the day to try again !
Many years ago I worked on a Citrix install for a school in Hull which used XenApp on Sun Solaris to provide Open Office to their students at home for doing their homework. At the time I was greatly impressed but after putting a XenApp server on Solaris in for one of the previous companies I worked for, I haven’t seen anything *nix related since.
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Citrix ADC Vulnerability CVE-2019-19781
Last Wednesday I got an update email from the Citrix Heroes community ran by DJ Eshelman about a new vulnerability which has been found with Citrix ADC appliances. Fortunately my home lab hasn’t been powered up much this past few weeks but today I decided to apply the mitigation steps to my VPX in case.
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pfSense – Learning And Making My Life Harder !
I’ve been using pfSense as the firewall for my home virtual lab for many years and it has increased me knowledge of firewalls by giving me one to play with in my own environment. As a consultant it’s proved invaluable for me in my job as it’s allowed me to quickly test what ports are needed to be opened for various applications, work out routing roulette issues I’ve seen on site, and even simulate setting up Active Directory Domain Trusts over an IPSec VPN.
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Nagios Pi Part Four
Since my last post I decided to concentrate on looking in to setting up distributed monitoring with Nagios Core servers and using my Nagios Pi installation as the central server. I looked around at the various options and went for using NRDP (Nagios Remote Data Protocol) as it enables me to use passive checks on the central server.
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Nagios – Changing The Default Page
Whilst playing with Nagios Core over the past couple of weeks again I got annoyed with it returning to the main page every time I refreshed it.
A quick google turned up a few articles and I found that it’s an easy change to the index.php file. Now my Nagios servers default to the Host Groups page which is much more useful !
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Nagios – Configuring Global Event Commands Using send_nrdp.py
Today I finally worked out how to configure the send_nrdp.py script as a Global Event Command after scouring the web for the solution. As with most things Nagios related, the documentation out there is a little light so I thought I’d put this up in case it helps others.
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Nagios Pi Part Three
Since my last post I’ve been mostly looking at how to start and shut down my environment at a certain times with success in starting but failure in shutting down.
The starting of my environment was an easy enough task with a simple bash script to send WOL packets to my hosts and using a For loop to fire it off five times for good measure.
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Nagios Pi Part Two
Since putting Nagios Core on my Pi the other day and getting it to monitor my basic network environment for a start I then looked at the monitoring my Public IP for if it changes. Almost straight away I found a Python plugin called check_public_ip which does the trick and now Nagios checks the Public IP every hour and alerts if it changes.
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Nagios – Putting My Pi To Good Use !
As with a lot of people it seems, I’ve had a Raspberry Pi knocking around for ages now which has really been doing anything.
This weekend I decided to start a project to rebuild it with Raspian Buster Lite and turn it in to a monitoring box using Nagios for my home network and maybe even look in to adding temperature and humidity probes at some point.
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FreeNAS – Speeding up my NFS Datastore for XenServer
While using a nested XenServer 7.1 on VMware ESXi 6.5 to test something unrelated I noticed that running sdelete on one of my Gold Image VMs was painfully slow. Looking on the XenServer performance I could see that the write latency was nearly 100ms to the NFS SR which would explain it being painfully slow on a VM.
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