Skip to main content

Authorized vs standalone DHCP


Standalone DHCP:

When a standalone DHCP server(ie server not added to the domain) starts,it sends a DHCP information message to its subnet to get information about the domain in which it is located and to see if there is any other authorized DHCP server in the network. If it doesn't get any valid response back either from an authorized DHCP server in the network it starts providing DHCp services to client. If it receives a response from an authorized DHCP server with details of the root domain,it will not provide DHCP services. This detection process is run every 10 mins for an unauthorized/standalone DHCP server

Authorized DHCP :

Only an Enterprise admin can authorize a DHCP server in a domain.This server should either be a domain controller or member of domain. During startup the DHCP will query the Active directory for the list of authorized DHCP servers. If it finds itself in the list, it will start DHCP services. This check is done every 60 minutes. If the DHCP server doesn't find itself in the authorized DHCP server list, it will stop providing DHCP services.

Comments

Popular posts from this blog

Windows server 2012: where is my start button??

If you have been using Windows Server OS for a while, the one thing that will strike you most when you login to a Windows server 2012 is that there is no start button!!.. What??..How am I going to manage it?? Microsoft feels that you really dont need a start button, since you can do almost everything from your server  manager or even remotely from your desktop. After all the initial configurations are done, you could also do away with the GUI and go back to server core option.(In server 2012, there is an option to add and remove GUI). So does that mean, you need to learn to live without a start button. Actually no, the start button is very much there .Lets start looking for it. Option 1: There is "charms" bar on the side of your deskop, where you will find a "start" option. You can use the "Windows +C" shortcut to pop out the charms bar Option 2: There is a hidden "start area"in  the bottom left corner of your desktop

Use Diskpart to make drives online

Issue: In disk management, disk is shown as missing or Offline in Windows Resolution: The disks can be made online by using diskpart utility - Open a command prompt->type diskpart -Inorder to list the disks in the system type: list disk -Note down the number of the disk that you want to make online -Select that disk to operate upon, For eg:, if the disk number is 1, type: Select disk 1 -Now that particular disk will be selected as teh active disk. If you type "list disk" command once more, you can see a * symbol on the left side of the selected disk -Inorder to make the selected disk online type : online disk - If the disk is made online, you will get a message that the operation is completed successfully

Kubernetes best practices in Azure: AKS name space isolation and AAD integration

Once you have decided to run your workloads in AKS service in Azure, there are certain best practices to be followed during design and implementation. In this blog we will discuss two of these recommended practices and the practical aspects of their implementation- Azure AD integration and name space isolation While AAD helps to authenticate users to your AKS cluster using the existing users and groups in your Azure AD, name space isolation provides logical isolation of resources used by them. It is useful in multi tenant scenarios where the same cluster is being used by different teams/departments to run their workloads. It is also useful in running say a dev, test and QA environment for organization in the same cluster. Combining AAD integration with name spaces allow users to login to their namespace using their Azure AD credentials AAD integration with AKS : The following Microsoft document will get you started  with AAD integration of AKS cluster.: https://docs.microsof