Notes on using a QSA to convert QSFP(+) to SFP(+) on Dell switches
by lunarg on March 27th 2020, at 14:13
It is possible to convert a QSFP or QSFP+ port to an single SFP or SFP+ port using the Quad to Small Form Factor Pluggable Adapter (QSA). However, in order for this to work, you'll need to configure the QSFP+ port into break-out mode to 4x10Gbps, similar like you would when using actual QSFP to 4xSFP break-out cables.

For OS10, the CLI for this action is:

interface breakout 1/1/7 map 10g-4x

This will break out the interface 1/1/7/ to 4 10Gbps links, which translates to these interfaces on the switch: 1/1/7:1, 1/1/7:2, 1/1/7:3 and 1/1/7:4:

show interface status ------------------------------------------------------------------Port Description Status Spe  ...
 
Copy DHCP reservations from one scope/server to another
by lunarg on March 27th 2020, at 11:52
On a Windows DHCP Server, if you have a lot of DHCP reservations in a particular scope on a server, and you have the need to migrate them to another scope (on the same or another server), you can do so quickly through netsh (a "legacy" command-line tool to perform network configuration on a Windows system).

Fire up a command prompt (or Powershell). First dump, the current scope configuration to a text file:

netsh dhcp server <serverIPAddress> scope <scopeAddress> dump > dump.txt

Note that if you run the command on the server where the originating scope is located, you don't need to specify the IP address/hostname of the server.

Open the text file with your favour  ...
 
Use Powershell to retrieve a list of Office 365 Global Admins
by lunarg on March 20th 2020, at 16:02

With the strong increase in hackers targeting Office 365 tenants, it may be useful to see who has Global Administrator access in your tenant. This can be done either via the Office 365 Portal but also through Powershell.

Note: be sure to install the required Powershell cmdlets before attempting this.

Connect to your Office 365 tenant:

Connect-MsolService

To retrieve a list of users with the Global Administrator role, run this:

Get-MsolRoleMember -RoleObjectId $(Get-MsolRole -RoleName "Company Administrator").ObjectId | Select DisplayName,EmailAddress

You can append Export-Csv to export the list to a CSV-file.

 
Exchange: configuring the TLS Certificate Name for receive connectors
by lunarg on March 17th 2020, at 09:26
If you wish to use TLS, or are using TLS authentication in a Office 365 Hybrid environment, and have manually changed or renewed the SSL certificate, you may still get errors about unable to initiate the TLS session (STARTTLS), even though the SSL certificate has been correctly renewed. Just setting the SSL certificate to be used with SMTP is not enough to make TLS work correctly. You also need to (re-)configure the TLS certificate name on your send and receive connectors.

As stated by the manual:

TlsCertificateName
The TlsCertificateName parameter specifies the X.509 certificate to use with TLS sessions and secure mail. Valid input for this parameter is [I]Issuer[S]Subject. The Issuer val  ...
 
macOS: disable Quick Look caching
by lunarg on February 20th 2020, at 16:47

By default, macOS'es Quick Look functionality caches previews of all files, even those found on file shares or encrypted file systems. This may not be what you want. Fortunately, you can disable Quick Look caching.

Open Terminal and type in these commands:

qlmanage -r disablecache
qlmanage -r cache
rm -rf $TMPDIR/../C/com.apple.QuickLook.thumbnailcache
 
Restore Windows Photo Viewer in Windows 10 (LTSC)
by lunarg on January 21st 2020, at 15:11
For people using Windows 10 LTSC builds, where the Windows Photos app is not available (and not installable), or for people with nostalgic feelings, you can restore the original Windows Photo Viewer from Windows 7.

The full article with registry hacks can be found here: https://www.tenforums.com/tutorials/14312-restore-windows-photo-viewer-windows-10-a.html. It reactivates Windows Photo Viewer as an option to open image files with, though you still need to manually make the association.

In a corporate environment, to force the file association to Windows Photo Viewer for various common file types, you can do so through GPO by creating a file associations XML:

<?xml version="1.0&qu  ...
 
Set macOS Dock size from a Terminal
by lunarg on January 13th 2020, at 14:50

If you want to set the Dock size in macOS to a specific value, you can use the Terminal to do so:

defaults write com.apple.dock tilesize -int 32; killall Dock

This will set the icon size to 32px, and then restart Dock. To get the current value of the Dock size:

defaults read com.apple.dock tilesize
 
Provision Panasonic KX-TGP500B01 on 3CX
by lunarg on January 7th 2020, at 11:40
It is still possible to provision the Panasonic KX-TGP500B01 on 3CX version 16 (tested with 16 update 3), even though it is deprecated, by following the instructions outlined here.

The phone template is no longer available but can be obtained by fetching it from 3CX version 14 or 15. Most people no longer have this running so as an alternative, you can grab the template from this article. The firmware files are still available for download from the 3CX website (see forementioned link).

Note that the same limitations to the phone usage apply, and with the template it is not possible to add the base station as a FXS/DECT device. Only the first handset is provisionable, additional handsets mu  ...
 
 
 
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