Im trying to Add existing virtual network on the screenshot above in Azure, but when I select the Subscription, the virtual network I want to connect to does not show up.
I had a google but couldn't find much to help, can anyone help me understand why my azure vnet cannot be attached at the moment and what needs to be changed on it to allow me to add it?
Virtual Network Rule has some limitations, you need to make your environment does not contain any of the following:
You can only add virtual network which has the same geographic region with your Azure logical SQL server. For example, if my logical SQL server is in Southeast Asia but my virtual network in East US then I will not be able to see it listed when adding a rule.
Rule can only be applied with Azure Resource Manager.
Rules cannot be applied with S2S VPN or ExpressRoute.
Moreover, to fully utilize virtual network rule, you need to also enable Microsoft.SQL service endpoint on your subnet. Click Service endpoints > Add. Choose service and subnet you want to enable service endpoint. Currently (as of this answer) only Storage and Azure SQL are available. Note that this is not actually required to do here, when adding existing virtual network (from logical server) you are given an option to enable service endpoint.
Related
If I am setting up an Azure SQL Database in a vnet which Azure App Service and Azure Function will access. Is using both Subnet Delegation and Service Endpoints the right way to go? I didn't fully understand the documentation.
Regarding subnet delegation, I read this Microsoft article and this stackoverflow post, which stated:
When you delegate a subnet to an Azure service, you allow that service to establish some basic network configuration rules for that subnet, which help the Azure service operate their instances in a stable manner.
That sounds like a good thing but makes me wonder how it worked efficiently w/o subnet delegation.
As for Service Endpoints, I read this Microsoft article, which states:
Virtual Network (VNet) service endpoint provides secure and direct connectivity to Azure services over an optimized route over the Azure backbone network. Endpoints allow you to secure your critical Azure service resources to only your virtual networks. Service Endpoints enables private IP addresses in the VNet to reach the endpoint of an Azure service without needing a public IP address on the VNet.
Does that mean I cannot reach the Azure SQL Database from my home machine w/a firewall rule?
They both sound like they have the same benefits and I'm struggling to understand the difference. I suppose the larger question is should I enable both for the simple architecture outlined above.
In the Microsoft service endpoints documentation they also mention:
Microsoft recommends use of Azure Private Link for secure and private access to services hosted on Azure platform. For more information, see Azure Private Link.
For some reason that seems like an Azure to on-premise thing.
• You cannot use a ‘Subnet Delegation’ along with a ‘Private endpoint’ since that subnet is delegated for the said service, in your case, the Azure SQL Database. Through a subnet delegation, you can define the NSG association for it, as well as associate multiple delegated subnets to a common NSG. You can also define the IP Address space for the delegated subnet, the route table association with it, the custom DNS entry configuration in Azure DNS as well as define the minimum number of IP Addresses available for that delegated subnet. Similarly, with regards to service endpoint, these stated functions are not available.
• In service endpoint, you do not have control over the routing mechanism as well as the IP address related allotment, reservation, or configuration. Also, managing DNS entries for the resources managed through them and controlling them through a firewall or NAT gateway isn’t required unlike a subnet delegation because all these things are managed by Microsoft Azure’s backbone network on your behalf.
Thus, both have their own features and specifications for enabling you to configure according to your own requirements.
Does that mean I cannot reach the Azure SQL Database from my home machine w/a firewall rule?
Yes, you will have to create a firewall rule to allow the access from on-premises system to Azure SQL Server/Database and configure the service endpoint accordingly to allow the VPN client IP Addresses for accessing the same over public internet.
Also, through Azure private link, you won’t be able to connect from on-premises to Azure as it uses a private IP address and a private DNS zone entry related to it to connect to Azure resources in the same virtual network.
To know more regarding the configuration of Azure service access from on-premises network, kindly refer to the below given link: -
https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-service-endpoints-overview#secure-azure-service-access-from-on-premises
Also, refer to the below snapshots regarding the configuration and selection of service endpoint for a particular subnet: -
I am considering to use Azure Lab Services and I'm trying to find a way to create everything in it with no Public IPs but I can't find a way.
I noticed I can make the VMs from each lab to use private IP using a peered Vnet with a selected address space but when I create a lab it creates the Template VM with Public IP so I tried to search for a way to change it but there were no options on changing it neither in the Azure Lab Services site or in the infrastructure. I thought maybe using Azure CLI I could create a Lab using Azure Lab Services with no Public IP but this is all the CLI PowerShell commands I found.
I'd be really grateful if anyone knows if there's a way to create a Template VM without a Public IP or if there isn't yet I'd like to know it too.
This is by design in Azure Lab Services. Azure Lab Services is a SaaS solution, which means that the resources needed by Lab Services are handled for you. The lab account is hosted in your subscription. The student VMs, along with the resources needed to support the VMs are hosted in a subscription owned by Lab Services. Here is the basic architecture:
Each organization or school will set up their own network in a way that best fits their needs. Because Azure Lab Services runs in the public cloud, some extra configuration may be needed to allow students to access their VM when connecting from the campus network, like setting firewall rules that block RDP or SSH connections to machines outside their own network.
So, each lab uses a single public IP address and multiple ports. All VMs, both the template VM and student VMs, will use this public IP address. The public IP address will not change for the life of lab. However, each VM will have a different port number. The port numbers range from 49152 to 65535. The combination of public IP address and port number is used to connect instructor and students to the correct VM.
Here are some more FAQs about Azure Lab Services.
Creating a lab that uses a private ip is now possible with the April 2022 Update of Azure Lab Services, with some caveats. An advanced networking feature call vnet-injection allows users to have more control over the network used for the lab.
You can see advanced networking architecture diagram in the using shared server article. (Sorry, I can't post images yet.)
You would need to:
Create a virtual network in your subscription.
Create a subnet that is delegated to Microsoft.LabServices/labplans.
Create a lab plan with advanced networking and connect it to previously created subnet.
Create lab using the previous lab plan.
Update NSG to deny traffic through public ip.
CAVEAT: The 'connect' button Azure Lab Services website will no longer work for students. (Known issue on the team's backlog.) You will need to provide a separate rdp file for students to use. It would contain something like:
full address:s:10.0.0.1:3389
prompt for credentials:i:1
administrative session:i:1
I have two vnets setup in azure, one in UK South and one in UK West. I have a single VM setup in each region and attached to the respective vnet.
I have peered the two vnets, using the peerings option in the blades on the azure portal. However I am still unable to ping one VM from the the other.
I have NOT setup any Gateways as I understand this is not needed and I can see form the Effective Routes on the Network Interface for each VM that the VNetGlobalPeering has been established
Has anyone managed to get this working? Or can someone point me the the direction of what I am doing wrong?
You dont need a gateway for this to work. what you need is to peer them and check the Configure virtual network access settings checkbox and configure your OS level firewall rules to allow the traffic.
Also, make sure NSG are not explicitly blocking that traffic
ps. you can follow this: https://learn.microsoft.com/en-us/azure/virtual-network/tutorial-connect-virtual-networks-portal
I've been searching for this for days and finally found most of the answer in this document https://learn.microsoft.com/en-us/azure/app-service-web/app-service-app-service-environment-control-inbound-traffic
It says that you can block ports to your web application service in Azure using a network security group. However, it says I have to keep some ports open.
e.g. "454: Required port used by Azure infrastructure for managing and maintaining App Service Environments via SSL. Do not block traffic to this port. This port is always bound to the public VIP of an ASE."
The question is does this port need to be open to the entire world? One of the options is open to virtual network (what virtual network is this?) I only want it open to the Azure infrastructure. How can I do this? What does VIP of an ASE mean?
Thanks,
Bestist :)
The question is does this port need to be open to the entire world?
It depends on your demand. If you want entire world(Internet) to access your app, you need open it.
what virtual network is this.
An Azure virtual network (VNet) is a representation of your own network in the cloud. It is a logical isolation of the Azure cloud dedicated to your subscription. You can fully control the IP address blocks, DNS settings, security policies, and route tables within this network. More information please refer to this link.
I only want it open to the Azure infrastructure. How can I do this?
Yes, you could do it. You should add Azure data center IP ranges to NSGs.
If you only want your virtual network devices to access your app services, you could configure NSG such as below:
What does VIP of an ASE mean?
VIP:A VIP is the public IP address associated with a VM. More information please refer to this link.
ASE: App Service Environments. More information please refer to this link.
I have an Azure Cloud Service (Worker Role) that needs to connect to my Azure SQL database and also connect to an external database.
In development the external database was on the public Internet and connectivity was not a problem.
However, the solution now needs to be deployed in a production environment and access to the external database is to be restricted by setting up a Virtual Network.
The Cloud Service, when deployed in the Virtual Network, gets an IP from the subnet, but seems to become inaccessible to the outside world, and is not connecting to the Azure SQL database (I also cannot RDP to it).
This seems to be beyond my level of understanding of networking, but I don't see why it should lose access to its neighbours in the Azure environment.
What am I missing? Do I need to get involved with Endpoints? Is the Virtual Network misconfigured?
Thanks in advance.
Your question is quite vague, in terms that it does describe the whole picture in the best possible way. Let me put my answer based on my understanding about your issue.
First of all - Azure virtual Network is Virtual Network. It is designed to enable secure cross-premisses connectivity with Windows Azure Data Center.
When you deploy a proper PaaS Cloud Service (Worker Role / Web Role) in a Virtual Network, the role instances get IP Addresses allocated from the defined DHCP pool (the VNet Definition).
When you deploy any service in an Azure Virtual Network you have to take care of Name Resolution! Meaning that, if you do not provide a proper DNS Server, your cloud instances will not be able to resolve any address. That includes Azure SQL Database servers. More on Name Resolution can be read here.
Next, but not less important - Azure SQL Database servers are not part of, and, as of March'2013, cannot be added to Azure Virtual Network!
The last statement means that in order for your Worker Role to access Azre SQL Database server, you need to provide a proper DNS server in your Azure Virtual Network.
And lastly, when you deploy a PaaS service into a Virtual Network, in order to access it via Remote Desktop need to:
* Properly enable and configure RDP extension. it will anyway create Input Endpoint. But this is the only way to enable RDP on PaaS right now;
* You could probably enable RDP via PowerShell startup script and access RDP via the VPN tunnel for the Virtual Network - say you configured a Site-to-Site or Point-to-site VPN for your Azure VNet.
Check the building cross-premises Virtual Network guide here.