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by lunarg on January 10th 2017, at 14:42
If your ESX host has lost connection to the vCenter server, but you can still directly access the host's management, and can find nothing else wrong with the vCenter server or its network connection to the host, you may want to the free space on your ESX host.

Logs and other temporary files may have filled up one or more ramdisk partitions (e.g. when you don't have a persistent scratch partition, it gets mounted on /tmp). This can cause any of the following issues:

Connection loss between the ESX host and vCenter server;

Errors when attempting to reconnect or add an ESX host to a vCenter server;

Errors while attempting to activate or configure HA;

Other unexplainable errors...

You can   ...
by lunarg on January 10th 2017, at 14:38
If the scratch partition (/tmp) gets filled up, check for the presence of the file ql_ima.log. If it is present, you are bothered by a bug from an older version of the qla4xxx driver. Even if you use Update Manager, this driver does not get updated automatically. The solution is add the driver to Update Manager or download and install the update manually.

This procedure describes the manual installation of the update on your ESX host. There's no need to put the host in maintenance mode but you will have to reboot to use the new driver.

Download the driver (you need a VMware account):

VMware 5.5

VMware 6.0

Unpack the download and copy the file qla4xxx-634.55.28.0-offline_bundle-1682448.z  ...
by lunarg on January 9th 2017, at 16:33
A new Powershell module, called Azure AD v2 is available to manage Office365 from Powershell, and is now the preferred method for managing Office365 tenants from Powershell. Unlike the older MSOnline module, you need to download and install this version from the Powershell Gallery, for which there is no direct download link.

Windows 10 already has the PowershellGet module needed to download modules from Powershell Gallery, so all you need to do is run the following in an elevated Powershell:

Install-Module AzureAD

You may get a message about NuGet provider is required to continue. You can safely confirm this.

Everything pre-Windows 10 and starting from Windows 7 SP1 and 2008R2 SP1, you n  ...
by lunarg on December 16th 2016, at 16:00
In iOS 10 it seems it is no longer possible to hang up a call on your iPhone when it is locked. In past release, the controls to hang up a call would automatically appear when moving or waking up the phone, but now you simply see the number or contact you're calling and the call time. It seems the call control buttons have gone, and to end the call, you have to unlock the phone, go to the Phone app and end the call from there, which is a hassle.

When looking on the internet about this, a lot of people think this is a bug, but actually, it's not... Apple has changed the behaviour because of the new way to unlock your phone (pressing the Home button rather than swiping).

To end the call, tap  ...
by lunarg on December 15th 2016, at 14:48

Ned Pyle from Microsoft TechNet wrote an article about DCDiag, explaining in detail what it actually does.

Read full article on TechNet.

by lunarg on December 14th 2016, at 16:29

Terry Zink, an MVP, wrote a good article about the difficulty most common e-mail filters have at stopping phishing impersonation attacks using simple display tricks.

Full article: https://blogs.msdn.microsoft.com/tzink/2016/12/06/where-email-authentication-falls-flat-at-stopping-phishing-impersonation-attacks-using-display-tricks/

by lunarg on December 9th 2016, at 10:53
When deploying a vShield Manager VA, its IP address is set to DHCP by default. Once deployed and started, you can log on through the console to change it to a fixed IP.

Open a VMWare console to the appliance and log on:

manager login: adminPassword: ****** (the CLI 'admin' password you entered during the deployment)

Go into enable mode and enter the setup:

manager> enablePassword: ****** (the enable password you entered during the deployment)manager# setup

Enter the IP address, subnet mask, gateway and DNS settings. When finished, you will be prompted to log out.

Note that after setting the IP address, I had to restart the appliance because the web interface was only accessible on t  ...
by lunarg on November 18th 2016, at 14:44

When running Get-ReceiveConnector, the contents of the RemoteIPRanges field may be truncated if there are a lot of entries. You can "expand" the list:

Get-ReceiveConnector MyConnector | Select -expand RemoteIPRanges | FT

This will expand each of the IP range objects and FT makes sure it's nicely formatted in a table. For single addresses, you only need the LowerBound column, but if ranges have been specified, you probably want both columns.

by lunarg on November 18th 2016, at 14:43
Now that Skype for Business 2016 for Mac is publicly available, you could get rid of the old Lync for Mac 2011. Preferably, this should be a clean uninstall. Microsoft has released KB2691870, explaining how to do this.

The uninstall is not very elaborate: dragging the Lync application to the Trash is sufficient but leaves configuration, preferences and chat history on your Mac. To get rid of those, remove the following files:

~/Library/Preferences/com.microsoft.Lync.plist

~/Library/Preferences/ByHost/MicrosoftLyncRegistrationDB.*.plist

~/Library/Logs/Microsoft-Lync*.log

Remove these folders:

~/Documents/Microsoft User Data/Microsoft Lync Data

~/Documents/Microsoft User Data/Microsoft   ...
by lunarg on November 7th 2016, at 16:40
If your Windows 7 happens to be stuck in Startup Repair, where allowing it to repair your computer still results in going back to Startup Repair, and restoring a restore point doesn't help either, you could try to manually restore the Windows Registry to the last known good configuration.

Allow your computer to boot into Startup Repair, but rather than letting it perform the automatic repairs, click to go to the System Recovery Options menu. From there, you can open a command prompt.

Locate the system drive: this is usually the C: drive, but if not, navigate to other drivers and look for folders like Program Files, Users and Windows.

Once you've found the correct drive, navigate to the fo  ...
by lunarg on November 3rd 2016, at 15:41
An SSL certificate and private key can be stored in many formats. Sometimes, it may be necessary to convert from one format to another. One such case is where you have a private and public key (certificate) in PKCS12 (PFX-file) format, and need the individual certificate and private key in X509 format. You can use OpenSSL to perform the conversion.

A PFX-file generally contains both the private and public key (certificate) and is usually secured with a passphrase. If the PFX-file you want to convert is secured with a password, you will need this in order to perform the conversion. If you do not have the password, there's no way to reset this and the PFX-file will be unusable. When performin  ...
by lunarg on October 28th 2016, at 08:58

You can easily backup the complete configuration of a Brocade FC switch through the CLI. It works similar to that of a Dell or Cisco switch, allowing to copy the configuration to a remote server. FTP, SCP, SFTP and others are supported.

Log on to your switch through the CLI, then:

Switch1:admin> configupload
Protocol (scp, ftp, sftp, local) [ftp]: scp
Server Name or IP Address [host]: 1.2.3.4
User Name [user]: remoteuser
Path/Filename [<home dir>/config.txt]: /home/remoteuser/switch1.txt
Section (all|chassis|switch [all]): all
remoteuser@1.2.3.4's password:

configUpload complete: All selected config parameters are uploaded
by lunarg on October 27th 2016, at 11:34

If you encounter the following error message while trying to backup the internal database (IDB):

Error
Putting the Internal Database into the backup mode failed.

The reason might be due to the backup being initiated by the Inet process which may run as a certain user account that has not been added to the impersonation of the cell manager.

To resolve, follow these steps:

  1. Start the DP GUI. Choose "Clients"
  2. Right-click the cell manager, delete the existing impersonation.
  3. Add a new impersonation and enter the correct credentials (usually the service account).
by lunarg on October 12th 2016, at 15:46
I found this little snippet online that allows you to preparse your Powershell scripts to ensure there are no syntax errors in it. This is useful if you need to know the script is error-free but are otherwise unable to run it.

Source: https://rkeithhill.wordpress.com/2007/10/30/powershell-quicktip-preparsing-scripts-to-check-for-syntax-errors/# Contents of file TestScript.ps1param($path, [switch]$verbose)if ($verbose) { $VerbosePreference = ‘Continue’}trap { Write-Warning $_; $false; continue }& `{ $contents = get-content $path $contents = [string]::Join([Environment]::NewLine, $contents) [void]$ExecutionContext.InvokeCommand.NewScriptBlock($contents) Write-Verbose "  ...
by lunarg on September 19th 2016, at 11:59
If you get a keyserver time out when trying to download a public key from a public GPG server, you may need to check your firewall settings. When receiving a public key, gpg connects to TCP port 11371, which not commonly opened up when you are behind a strict firewall. Luckily, most key servers also listen on port 80, allowing to get the public keys through that port.

When attempting to download a key and you are not able to connect to the default port, you will get something like:

gpg --keyserver keyserver.ubuntu.com --recv-keys 94558F59gpg: requesting key 94558F59 from hkp server keyserver.ubuntu.comgpg: keyserver timed outgpg: keyserver receive failed: keyserver error

To force gpg to d  ...
by lunarg on August 19th 2016, at 16:17

Found this interesting read on VMFS Extents and some of the (negative) myths that have arisen over the years:

https://blogs.vmware.com/vsphere/2012/02/vmfs-extents-are-they-bad-or-simply-misunderstood.html

by lunarg on August 16th 2016, at 14:30
Like private IP address ranges (defined in RFC 1918), there are also private MAC address ranges. These are called Locally Administered Address Ranges which are never used by devices or other vendors. MAC addresses in these ranges can be safely used, assuming they are unique within your network:

x2-xx-xx-xx-xx-xx

x6-xx-xx-xx-xx-xx

xA-xx-xx-xx-xx-xx

xE-xx-xx-xx-xx-xx

The ranges may seem odd but is explained best by this excerpt from Wikipedia:

Universally administered and locally administered addresses are distinguished by setting the second least significant bit of the most significant byte of the address. If the bit is 0, the address is universally administered. If it is 1, the address  ...
by lunarg on August 10th 2016, at 15:31
It may not seem evident to find out which mailboxes are accessible by a particular user or group. Through EAC, there is no apparent way to do this, as giving access for a user to a (shared) mailbox can only be done through the shared mailbox and then providing the user/group access. There is no way to query a particular user/group and show a list of mailboxes that user/group has access to. Fortunately, it seems that Powershell (EMS) does provide an easier answer.

These cmdlets work in both Office365 and on-premise Exchange 2007 or newer.

List mailboxes to which a user/group has access to:

Get-Mailbox | Get-MailboxPermission -User user1

Although the cmdlet states a user name, replacing th  ...
by lunarg on August 8th 2016, at 16:10
Microsoft has disabled the F8 key so you can no longer boot Windows 10 in Safe Mode right after powering on your computer. Safe Mode (although it's no longer called that) is still available but is only accessible if you explicitly asks for it when running Windows (there are plenty of articles that explain how this works). Windows 10 also has a mechanism for detecting boot problems and will automatically start in Safe Mode if normal startup is no longer possible. But what if you're not able to start Windows 10 the normal way, and the detection mechanism doesn't work? You can then opt to boot using a Recovery Drive (can be a DVD or USB stick). Or, you can simply re-enable the F8 key... (needs   ...
by lunarg on August 8th 2016, at 12:31
When performing a backup using VSS, a warning is logged in the Application event log of Windows with ID 8230 while taking the VSS snapshot. The backup may subsequently fail.

The warning states:

Volume Shadow Copy Service error: Failed resolving account Administrator with status 1376. Check connection to domain controller and VssAccessControl registry key. Operation: PrepareForSnapshot EventContext: Execution Context: Writer Writer Class Id: {afbab4a2-367d-4d15-a586-71dbb18f8485} Writer Name: Registry Writer Writer Instance ID: {0c8f797c-42cb-410d-a2c3-2877a6c93e38}Error-specific details: Error: NetLocalGroupGetMemebers(Administrator), 0x80070560, The specified local group does   ...
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