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Latest Articles
CREATING CAPTURE TASK SEQUENCE ON MDT 2013
August 20, 2019
The first step is to create a new Task Sequence, which will control the image capturing process. Run Deployment Workbench console and expand branch Deployment Shares -> MDT Deployment Share Right click on Task Sequence and select New Task Sequence in the appeared menu This starts the Task Sequence Wizard. Enter Task Sequence ID (w10Capt) and Task Sequence Name (Capture Windows 10 Image). From list...
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Sip ALG
August 20, 2019
Even though SIP ALG is intended to assist users who have phones on private IP addresses (Class C 192.168.X.X), in many cases it is implemented poorly and actually causes more problems than it solves. SIP ALG modifies SIP packets in unexpected ways, corrupting them and making them unreadable. This can give you unexpected behaviour, such...
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Mac Profile manager
August 20, 2019
Issue: Push (profile, APP) function does not work: Solution: Check if the server cert is expired, try renewing your Apple Push Notification Certificate: – Go to the Server.app – Server Name at top left – Settings / Notifications – Edit Apple ID – Renew Logout script ( for Proxy software, I...
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VoIP basic
August 18, 2019
Major Stages of Voice Processing in VoIP For voice transmission over an IP network, the voice wavelength must be sampled, quantized, encoded, optionally compressed, and then encapsulated in a VoIP packet. Terminology Gatekeeper: Cisco gatekeepers are used to group gateways into logical zones and perform call routing between them. Gateways are...
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Building hybrid AD with Password Hash Sync
August 15, 2019
Choose the solution suits you There are two solution for the Hybrid AD: Password Hash Sync or Pass-through Authentication. See the explaination, go here: https://docs.microsoft.com/en-us/azure/security/fundamentals/choose-ad-authn i will use Password Hash Sync in my example as it is the simplest way to enable authentication for on-premises directory object in Azure AD. Prerequisite: setup on premises AD https://docs.microsoft.com/en-us/azure/active-directory/hybrid/how-to-connect-install-prerequisites...
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Remote desktop for Graphic designers via cloud solution (Azure)
August 14, 2019
You may come across some scenarios like some user need to do designing jobs from home, or setup a GPU server for students, who may only study the Graphic design class for a couple of hours a week, so a RDP session with GPU would meet these scenario or even setup VM in Azure and...
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QoS basic
August 14, 2019
QoS is a fundamental network infrastructure technology—in the same class as high availability and security technologies. As the network traffic is evolving and video traffic is growing fast, the QoS plays an important role in model network. Not only bandwidth, several basic characteristics define a traffic class and thereby dictate the network’s handling of packets...
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Configure QoS for RDP with GPO and Cisco Switch
August 13, 2019
We all know that the RTP(real time protocol) traffic and VOIP needs priority when they get passed along the switch and rouers. RDP traffic may require special treatment if you run delay sensitive program, which will also need QoS setup. I will use DSCP for the QoS setup in this lab....
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QoS with Cisco Switch and routing
August 10, 2019
Quality of Service (QoS) is a suite of technologies used to manage bandwidth usage as data crosses computer networks. Its most common use is for protection of real-time and high priority data applications. Rrerequisite Before configuring standard QoS, you must have a thorough understanding of these items: The types of applications used and the...
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Install Azure Powershell for windows 10
August 8, 2019
1. In the first, you have to make sure that you have the right version of “PowerShellGet” you can make sure of that by running the below command, and the result must match the below screenshot. Get-Module PowerShellGet -list | Select-Object Name,Version,Path 2. Rerun PowerShell but with Administrator privileges. 3. Run the...
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Azure
August 8, 2019
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Windows proxy Setting – GPO ( Per user, Per computer)
August 6, 2019
First of all, we need to understand the sequence of GPO settings being applied: computer settings in the GPO are applied when the computer boot and before user login. User settings in the GPO are applied when user logon the computer. So if any settings exist in computer settings and User settings, the user settings...
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Popular Powershell scripts
July 25, 2019
Mirror OU structure to the Folder structure Some times, you create same OU structure as the folder structure, you can use below scripts to automate this: Example: In the D drive,you have folder called Departments, you want the subfolder names are same as the OU names under OU=Departments,OU=Users,OU=frankfu,DC=click. get-childitem -Path "E:\Data\Departments" |` foreach {new-ADOrganizationalUnit -name $_.Name...
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Windows server IPAM
July 23, 2019
IPAM (IP address management) IPAM is new in Win2012, has monitoring, auditing, and reporting functions to help you manage key server components in an IP network. IPAM handles forest-wide discovery and managment of MS DHCP, DNS, NPS, and DC servers, and monitors DHCP scopes and DNS zones throughout the network. IPAM infrastructure IPAM infrastructure consists...
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NPS – Wireless authentication with Computer certificate ( EAP-TLS )
June 25, 2019
Purpose of this Project We will let the mobile devices (Laptop, windows tablet) be able to logon in the wireless network automatically via certificate based authentication before user login, so mobile devices can pull the computer GPO, such as MSI deployment. And after user login, it will switch to user certificate based authentication, and allow proxy...
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Cisco WLAN controller password cracking
June 20, 2019
First you need to get a copy of the configuration file, how ? Use your sniffing skills, which I will not show here. Open the file, find something like below: mgmtuser add encrypt testadmin 1 a9836e23b845fef2d73ac99f01dfae20 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 16 79f0be7ced838052b0cdfc062764c2de0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 read-write or radius auth add encrypt 1 192.168.11.21 1645 password 1 a9836e23b845fef2d73ac99f01dfae20 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 16 79f0be7ced838052b0cdfc062764c2de0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Having...
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Accurate time on Windows Environment (NTP)
June 13, 2019
NTP server in Windows Domain In a windows Domain, the Domain controller (PDC) is acting as a ntp server, and advertising itself, so all the host machines are syncing time from the DCs. Which usually don’t need to configure. To guarantee all the hosts is running on time, you first need to make sure...
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Joomla installation
June 12, 2019
Joomla installation: The Files and folders on a cgi (suExec/SuPHP) driven server are 755 for folders and 644 for files with an extra security on the configuration.php = 640 This is how all Joomla site must operate to be secure. Any other settings are incorrect and dangerous or make Joomla not work. If your server...
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Joomla
June 12, 2019
Joomla is a more technical CMS compared with wordpress....
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Drupal installation
June 7, 2019
The directory sites/default/files does not exist. An automated attempt to create this directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually, or ensure that the installer has the permissions to create it automatically. For more information, please see INSTALL.txt or the...
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demote DC been interrupted by missing server holding FSMO role
June 6, 2019
When you try to do a clean system installation for a domain upgrade, you will demote the old DC. Following error come up: Ownership of the following FSMO role is set to a server which is deleted or does not exist. Operations which require contacting a FSMO operation master will fail until this condition...
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Deploy Wpad in DHCP
June 6, 2019
We can use WPAD to automate the proxy setting process. Deploy with IIS The hosting web server must be also set to serve .dat files as “application/x-ns-proxy-autoconfig” mime types and the wpad.dat file should be located at the web site’s root directory. For example in an IIS configuration, you should do the following: Go...
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VOIP Codec
May 29, 2019
What codec should I use ? PCMU (G711u) is used by default. Both PCMU and PCMA will give you toll quality but their bandwidth consumption is also the highest. If your network bandwidth is low, you can choose a lower-bit-rate codec such as G723 or G729 which will give you near toll quality at...
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Windows ESD image to WIM image
May 15, 2019
In windows ISO, you get an ESD file which is not the correct format for WDS, SCCM. You can use either DISM command or a third party software DISM++ Windows DISM command First we check how many version in the ESP file: Dism /Get-WimInfo /WimFile:install.esd You will see something like: Index:1 Name: windows 10 Home...
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