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Getting firmware version information on ESXi and GNU/Linux
You may not always have the convenient option to install vendor-specific hardware management agents/extension on ESXi hosts or physical servers, for example with appliance-ish OSes like the Check Point...
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Check Point R75.45 released
Last week, Check Point released the first major update to the Gaia-introducing R75.40 version. The release of R75.45 mainly brings enhancements and fixes for the new Gaia platform: R75.45 Release...
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Re-Attaching a previously detached storage device
A while ago we were getting rid of some old, now unused datastores on our FC-storage, so we proceeded to unmount and remove the VMFS datastore, and then detach the LUN device through the vSphere client...
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Invoke-VMScript issue: “The guest operations agent could not be contacted”
The Invoke-VMScript PowerCLI function provides a cool way to execute scriptcode inside guests through the VMware tools, on Linux and Windows VMs (as long as a couple of prerequisites are met). While...
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Control vCenter performance counter collection and get back VM IOPS statistics
After updating from vCenter 4.1 to 5.0 quite some time ago, I noticed how my custom scripts collecting historical VM-level performance statistics suddenly logged zero-values for the IOPS counters...
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January (or Febuary?) HP ESXi updates
Attention: [Update 16.01.2013] HP actually pulled the updates (which were titled “February” updates) from their VIBs Depot site and purged the references from the depot metadata indexes as well. I’m...
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iLO Login check script
We recently changed the iLO local account logins in favor of LDAP authentication against our AD, which is cool but raised the issue that sometimes logins seemed to work with my AD account and sometimes...
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nscd DNS caching and postfix
A few of our mail gateway servers running with postfix/policyd-weight/amavis/spamassaisin generate a lot of DNS queries to our DNS servers at times. I’m not particularly concerned about that myself but...
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April HP ESXi bundle update fixes SmartArray warning
After the ridiculous mess HP caused with their last updates to the custom ESXi extensions back in January/Febuary, HP released new updates to the HP CIM providers a few days ago. This update is fixing...
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ESXi 5.1 Update 1 and vCenter 5.1 Update 1 released – grab your fixes
The long anticipated first major Update bundle of ESXi and vCenter 5.1 has finally been released. Download them at the usual place. The insane list of fixes confirms my gut feeling again that...
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HP Virtual Connect Firmware 4.01 released
After announcing it a while ago already, HP released Virtual Connect firmware 4.01 last week to the public: http://www.hp.com/swpublishing/MTX-312edceee05e4f13a316c9c504 The release notes can be found...
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[Script] PowerCLI – find out the host on which VMs are running when vCenter...
Many moons ago, when I started playing with the wonderfulness that is PowerCLI, one of the first things I wrote with a particular problem in mind was a small script to quickly locate the host running...
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[Script] Perl – Check Point firewall logfile analysis – dropped connections...
Here’s a simple perl script I wrote some time ago in order to analyze Check Point firewall logs for dropped connections, outputting a simple statistic by drops per source-IP. It also displays the...
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[Script] Perl – Check Point firewall logfile analysis – rule usage
Continuing from my previous post, here’s another quick and dirty perl script I used some time ago to provide a basic analysis of Check Point firewall logfiles in terms of rule usage. It kind of lost...
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Configuring and securing local ESXi users for hardware monitoring via WBEM
Besides good ol’ SNMP, the open Common Information Model (CIM) interface on an ESXi host provides a useful way of remotely monitoring the hardware health of your hosts via the Web-Based Enterprise...
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Storage performance testing: Not all IOPS are created equal
Every once in a while I come across postings of astonishingly awesome IOPS numbers achieved with a relatively moderate setup. Often this is due to the fact that the benchmark used ran a “maximum...
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Forefront TMG Log Export with MSDEToText.vbs messing up IPs
Logging Firewall or Web Proxy traffic on a Forefront TMG/ISA node into the local SQL Express-based database (which is the default setting) has a few advantages, like being able to query past logs...
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openssl heartbleed attack – The cryptocalypitc judgement day has arrived
The internet is now (no really, this time it is, pinky-promise) officially broken™. Or at least a large part of it that is responsible for securely handing your shopping cart and credit card...
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Squid and chunked transfer encoding shenanigans
A while ago I was troubleshooting an issue with a certain client software (that I don’t even know the name of) on an internal network, that was uploading images via HTTP to a remote service on the...
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[Script] Poor man’s vSphere network health check for standard vSwitches
Among many other new features, the vSphere 5.1 distributed vSwitch brought us the Network Health Check feature. The main purpose of this feature is to ensure that all ESXi hosts attached to a...
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