What is the correct process for getting multiple VMs to report their public IP as the same address in Microsoft Azure? I have them in the same subnet on the same VNet already, and there is a gateway on that VNet with a dedicated public IP however all machines are reporting unique public IPs.
In general each Azure VM have their own IP (Public or Private or both).
However you can keep one IP at front and VM behind by -
Option 1 : Place a azure public loadbalancer and keep the VMs behind this and route the traffic by creating rules.
Option 2 : Easy Option if the VMs are identical (same OS, Size etc) you can use the Azure Dev test Lab with shared IP option for multiple VM. This option is there in the advance setting part of create VM dialog, here you can define the instance count as well.
Link for DevTestLab - https://learn.microsoft.com/en-us/azure/devtest-labs/tutorial-create-custom-lab
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I want to provision a VM which has no public ip so it can only be connected from other VM who have public ip. Now i can create a VM without public ip but then it does not have a internet access.
Now is there a way on Azure like on AWS where i can provision a NAT gateway or NAT instance on public subnet and let the private instances have internet connection
I also tried using NAT Gateway on Azure but it doesn't work unless i assign public ip to VM which is not what i want
I have two subnets lets say public_subnet & private_subnet , now i can ssh to my private vm from a jump but the thing is when i login to my private vm i cant install any package or even not able to ping or curl to any website. Both subnets were created using terraform so the configuration of subnets are all same there is no change is subnet configuration
Azure VMs have internet access by default, you dont have to do anything for them to have outbound access. It just works. Even without the public IP
There's two possibilities:
First one, under the same Vnet, you provision you VM without a public ip adress and then access it using Azure Bastion. You can find more details here.
Second one, is to provision two or more VMs in the same subnet one with public IP and the other without a public IP. and then access the one with private IP from the one with public IP.
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've recently setup a point to site VPN on Azure. In doing so I have created:
Azure Virtual Network
Azure Virtual Network Gateway
Azure Virtual Network Gateway IP (static)
Azure VM
I was under the impression that any VM set to use the above said Virtual Network would all share the same public IP? However it appears that the Azure VM i setup is instead using its own dynamic public IP.
Is there a way to route any VM on the Custom Virtual Network I created through one public IP? IF so - how can I do this?
According to your description, you have create a point-to-side VPN. in this scenario, we can remove the public IP addresses from VMs, then you can access your VMs with private IP addresses via VPN.
You are correct - I have the VPN working correctly. My only concern is this, it'd be great that if any of those VM's in that private network shared the same static IP - that way I could grant access to that IP in my firewall to other systems i have in other hosting platforms (as they are all typically locked down by ip).
It sounds like your reference to availablity sets may be the phrase i was looking for to further google.. i will check it out and let me know
please let me know if anything I added above changes your answer/recommendations :)
I was under the impression that any VM set to use the above said
Virtual Network would all share the same public IP?
You are talking about Azure ASM module (classic). In ASM module, VMs can use the same public IP address(NAT).
However it appears that the Azure VM i setup is instead using its own
dynamic public IP.
In Azure resource module, we can create Azure VMs with different Public IP addresses.
Is there a way to route any VM on the Custom Virtual Network I created
through one public IP?
According to your description, you have create a point-to-side VPN. in this scenario, we can remove the public IP addresses from VMs, then you can access your VMs with private IP addresses via VPN.
If you want to access those VMs from Internet and use one public IP address, we can create VMs in the same availability set, and deploy a Internet facing load balancer, then add NAT rules to them, in this way, we can access those VMs use the same public IP address and different ports.
I have 2 Virtual Networks and each of them has a subnet. I want to assign 2 private IP's to a virtual machine. One private IP resides in 1st Virtual Network while second private IP is in 2nd Virtual Network.
I have tried attaching 2 NIC's to the VM, and attached the first private IP to first NIC and second private IP to second NIC.
When I deploy the ARM template it says that second NIC is referring to a subnet which is not in same Virtual Network?
How can I achieve this in Azure?
How can I achieve this in Azure ?
As far as I know, Azure does not support this.
For now, Azure just support multiple NICs on the same virtual network.
Q:Are there any limitations to this feature that customers must be aware
of?
A:Multiple NIC is supported on Azure VMs (IaaS, Standard SKUs) only;
and VMs must be in an Azure Virtual Network.
More information about multiple NICs, please refer to this link.
Select the existing NIC for the box you are trying to assign the second Private IP,
Select IP configuration on the right tab bar,
Click on +Add, write a name for your new IP address,
Select static Private IP address (it could stay as dynamic as well)
I think your best bet would be Azure VNET Peering, which can loosely be thought of as a VPN between the two VNETs via the Azure backbone. This way, all machines in one VNET can talk directly to all those in the second VNET. It assumes that there's no Address Space crossover between the to VNETs, but if that's the case you may always have struggled.
There's a good article here which explains it in more detail.
The best scenario to implement this through below steps.
Site 2 site between the 2 VNET thru VPN gateway.
Also you have to make the machines in Fail over cluster so as they form a cluster.
I created 2 vms, one for centos and another one for azure, I used the same cloud service, but both have the same public IP Address, why>? can I change it?
Or they have to be in different separate cloud services?
By default, they are behind a single IP address which load balances the private IP addresses. Until recently, there was no way to get a public IP for a virtual machine.
Now, it's possible to assign a public IP to a virtual machine:
With Instance-level Public IPs for VMs, you can now assign public IP addresses to your virtual machines, so they become directly addressable without having to map an endpoint through a VIP. This feature will enable scenarios like easily running FTP servers in Azure and monitoring virtual machines directly using their IPs.
We are making this new capability available in preview form today. This feature is available only with new deployments and new virtual networks and can be enabled via PowerShell.
Typically, the load balancer is fine, but there are options if you absolutely need access to individual machines.
Since they're in the same cloud service, they're probably behind the same load balancer, and a load balancer would only have one public IP.
So, yes, I would use different cloud services as you mentioned.