In my Azure Databricks workspace the default DNS IP is #168.63.129.16, this DNS doesn't resolve azure storage accounts which were created a year ago, after switching the 8.8.8.8 then the cluster sees these storage accounts.
Is there a command line that helps to get the list of default Azure Databricks DNS server IPs and is there is away to learn latest DNS refresh date !?
IP address 168.63.129.16 is a virtual public IP address that is used to facilitate a communication channel to Azure platform resources. Customers can define any address space for their private virtual network in Azure. Therefore, the Azure platform resources must be presented as a unique public IP address.
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I am connecting to a client FTP Storage blob via FTP in Azure from a managed Azure VM. I want to force the VM's public IP to be used but it is forcing the Private IP connect, this can be seen from the client logs. What do i need to configure to force the use of the public IP?
Basically the vm from where you are trying to connect to and your
storage account need to be part of same Virtual Network and Subnet.
Check if the firewall is blocking and disable the firewall on the blob
storage .
Also check in your case if both vm and azure storage are in same region:
Services deployed in the same region as the storage account use private Azure IP addresses for communication.i.e; your VM uses the
internal network (over ipv6 and not the VMs published IP addresses
)to attempt to access the Storage so adding the public IP won't work
as IP network rules have no effect on requests originating from the
same Azure region as the storage account
Thus, you cannot restrict access to specific Azure services based on
their public outbound IP address range.Reference: Configure Azure
Storage firewalls and virtual networks | Microsoft Docs.
To allow same-region requests try to use Virtual network rules .
One way to try is by adding the Virtual Network subnet of the VM to
the firewall rules and adding Azure.Storage as service endpoint to
the subnet. If added through Azure Portal the service
endpoint will be automatically added .
Please check the references:
Allowing azure storage connectivity to a public IP - Microsoft Q&A
networking - Cannot to Azure blob storage from VM because of firewall - Stack Overflow
We have a virtual machine created in Azure which is using a private VNet configured with custom DNS servers in order to domain join the VM (eg. contoso.com)
Now we have a private DNS zone (eg subdomain.contoso.com) created in Azure which is linked to the same VNet as the VM. However, we are not able to resolve the private DNS entries from within the domain joined VM as I believe, Azure query the Azure private DNS with the IP 168.63.129.16
Is there a way we can forward DNS requests from a VM in Azure VNet using custom DNS servers to Azure private DNS zone linked to the same VNet?
Any help is much appreciated. Thanks.
By using Azure Private DNS, you can resolve domain names in a virtual network without the need to add a custom DNS solution.
By using private DNS zones, you can use your own custom domain names rather than the Azure-provided names available today
Is there a way we can forward DNS requests from a VM in Azure VNet
using custom DNS servers to Azure private DNS zone linked to the same
VNet?
If you have created custom DNS private zone, you can enable Autoregistration feature so that DNS requests from your VM in the VNET will be forwarded to the Azure private DNS zone
I want to connect mongodb-atlas with databricks, in the spark connector documentation they mentioned give ip address of databricks in the mongodb-atlas IP Whitelist. My question is how to get the IP address from databricks, Can someone help me with this?
As you can see in the images if you go to Azure account and go to data bricks, you can see Managed resource group, click on it and check for Public IP address, click on it and can see the Public IP address
Get a single NAT-like public IP or CIDR for all Azure Databricks clusters, which could be configured in a whitelist for any data source.
This is a high-level guide on how to establish connectivity from your Azure Databricks Workspace to your on-premises network. It is based on the hub-and-spoke topology shown in the following diagram, where traffic is routed via a transit virtual network (VNet) to the on-premises network.
This process requires your Azure Databricks workspace to be deployed in your own virtual network (also known as VNet injection).
Atlas only allows client connections to the cluster from entries in the project’s whitelist. Each entry is either a single IP address or a CIDR-notated range of addresses. For AWS clusters with one or more VPC Peering connections to the same AWS region, you can specify a Security Group associated with a peered VPC.
For Atlas clusters deployed on Google Cloud Platform (GCP) or Microsoft Azure, add the IP addresses of your GCP or Azure services to Atlas project IP whitelist to grant those services access to the cluster.
use the code snippet to get the IP of your databricks cluster
import urllib.request
with urllib.request.urlopen('https://api.ipify.org?format=json') as response:
html=response.read()
print(html) ```
I have an azure network set up with the default Azure DNS.
All the VMs are ubuntu.
When I try to access another VM on the network via the public DNS name it resolves to the public IP.
How do I make it resolve to the internal IP when I request it from the virtual network (and obviously still resolve to the public IP when requested externally).
I'm interested in cli answers as well as configurations through the portal.
Azure DNS for IaaS and PaaS solutions
Please see this article for more information on Azure's own DNS service associated with virtual networks. In short
When role instances and VMs hosted in Azure need to resolve domain
names to internal IP addresses, they can use one of two methods:
Azure-provided name resolution
Name resolution that uses your own DNS server (which might forward queries to the Azure-provided DNS servers)
The type of name resolution you use depends on how your VMs and role
instances need to communicate with each other.
Azure DNS Private Zones (in preview)
There's also a relatively new service called, Azure DNS Private Zones that allow you to set up a private DNS service to be used with, for example virtual networks.
This service allows you to set up a private domain and private IPs for your machines. See this page for more information and some common usage scenarios.
Also, see this this feature suggestion:
Enable split DNS for providing both public and internal name resolution to VMs in the VNET
I had a need to add additional public IP addresses to an Azure VM and found a working solution here:
Azure VM: More than one Public IP
Essentially this creates a reserved IP in Azure and then adds the reserved IP to a cloud service. Once it's bound to a cloud service it can be mapped to a VM endpoint.
This all works great but there is one bit I don't understand - The IP address of the reserved IP and the resultant VM endpoint don't match. I have to set up DNS to point to the IP address of the endpoint to make this work. Is there something I am not doing right, or is this just the way reserved VMs work?
It looks like this unanswered question is the same issue:
azure reserved IP for VM is diffrent than the given
Thanks!
The "Azure Cloud Service" is a container that provides internet connectivity to "Azure VMs". Thus, you assign the Internet facing Public IP to the Cloud Service. This article is relatively good at explaining the relationship: Azure Cloud Services
From above link:
Here’s a definition of an Azure IaaS cloud service that will make it easy for you to understand what it is in the context of Azure Infrastructure Services:
A cloud service is a network container where you can place virtual machines.
All virtual machines in that container can communicate with each other directly through Azure (and therefore don’t have to go out to the Internet to communicate with each other).
This container is also assigned a DNS name that is reachable from the Internet.
A rudimentary DNS server is created and can provide name resolution for all virtual machines within the same cloud service container (note that name resolution provided by the DNS server is only available to the virtual machines that are located within the cloud service).
One or more Virtual IP Addresses (VIPs) are assigned to the container and these IP addresses can be used to allow inbound connections from the Internet to the virtual machines.
Certain services (like FTP) may require your vm have a public IP: Azure VM Public IP
(IaaS v1) An Azure cloud service comes with a permanent DNS name - something.cloudapp.net - and has a single VIP allocated whenever there are VMs deployed in it OR whenever a reserved IP address is associated with it. Traffic is either load balanced or NATted (port forwarded) to the VM from the Azure Load Balancer sitting on the VIP. You can also associate a public instance-level IP address (PIP) with a VM, which gives it an additional IP address. The VIP always has a DNS name (something.cloudapp.net) while the PIP has one only if you specifically add it, I did a post which goes into these differences.
(IaaS v2) VMs are not deployed into cloud services and only have a public IP address if one is specifically added - either by configuring a PIP on the NIC of the VM (and optionally giving it a cloudapp.azure.com DNS name) or by configuring a load balancer and either load balancing or NATting traffic to it. This load balancer is configured with a public IP address and can optionally have a cloudapp.azure.com DNS name associated with it. (Ignoring internal load balancers in this discussion.)