What are the resources I need to have several azure virtual machines (with their correspondant private ips) behind the same public ip? Load balancer, public ip address resource (but associated with what)...?
Do I need to associate a public ip address to the same network interface (seems not to be possible) or virtual network, having those network interface or virtual network associated to several virtual machines?
For Azure load balancer, there are two SKUs: basic and standard. Each of SKU has internal or public type. You can use public load balancer of any SKU, then add the azure virtual machines, scale sets or availability sets as the backend pool. The public IP address of load balancer is an independent resource which is not associated with any other network interfaces. Every VM behind the load balancer have its private IP address or you can add its individual public IP address.
You can get more details about Azure load balancer.
Related
I have a Virtual Network Gateway setup on my Azure subscription, and a number of VMs which connect to it.
The VN Gateway created a Public IP automatically, and has it listed in the 'Overview' screen.
However going onto any website to check my IP (e.g. whatsmyip.org) gives me an entirely different Public IP. Anyone know why this is?
My configuration of the Virtual Network Gateway is very basic with mostly defaults and the VpnGw1 SKU.
The public IP assigned to the virtual network gateway is a public IP to let you connect Azure VPN gateway from your on-premises network or the Internet.
However, by default, there is a default route to make that Azure VM can continue to accept and respond to requests from the Internet directly. If VM has been assigned a public IP address to the NIC, the outbound traffic from VM will use this IP address. If the VM does not have a public IP address, Azure translates the private source IP address of the outbound flow to a public source IP address. This public IP address is not configurable, cannot be reserved, and does not count against the subscription's public IP resource limit. Read Outbound connections scenario overview.
So the outbound public IP of Azure VM is different than the virtual network gateway public IP.
Need to configure a Azure Loadbalancer for VM's in VNet with only private IP's, but without VM's having public IP we cannot map to the loadbalancer. Why so?
Certainly, you can target VMs with only private IPs and without public IPs to the backend pool of Azure load balancer. If so, you could access the backend VMs via the load balancer public IP address.
For example, you can create a Standard Load Balancer as the internal or public load balancer. Standard Load Balancer is fully integrated with the scope of a virtual network. It supports the VMs with standard SKU public IP or without public IP in a VNet as the backend resources.
Quickstart: Create a Standard Load Balancer to load balance VMs using the Azure portal
we have an active-passive server setup.So we want to allocate a public ip to active server. We are able to do this in AWS using eip .Is there any feature which we can use in azure just like eip in aws?
You could use static Public IPs in Azure. You could associate a Public IP to a VM's NIC then change the IP address assignment to static. Also, Azure DNS allows you to reach this IP via a Public custom DNS name.
We do support Static Public IPs in Azure today that is equivalent to
Elastic IP in AWS. Static Public IPs can be mapped to a VM’s NIC
(elastic IP equivalent) or to a load balancer’s Front end IP.
More details from the Azure feedback.
Apart for the Azure Load balancer, you may have interested in Azure traffic manager which is a DNS-based traffic load balancer that enables you to distribute traffic optimally to services across global Azure regions, while providing high availability and responsiveness.
We have a client that does not support NAT or RFC1918 addressing within VPN tunnels (encryption domain) and/or Peers.
The Azure virtual network gateways setup without a load balancer appear to not do NAT unless you have a load balancer out front which is good, correct me if I am wrong.
But can internal virtual machines in the virtual network at Azure have public ips only? Or does Azure require private virtual network addressing but you can also associate the public IP? We have set it up with the gateway public ip, virtual network with a 10.x.x.x subnet and associated public IPs to the sources or virtual machines.
Can virtual network machines only have a public IP at Azure? Or can you reach instances by public IP when connected to the Azure virtual network public IP even with private addressing in addition to the public IP binding?
But can internal virtual machines in the virtual network at Azure have
public ips only? Or does Azure require private virtual network
addressing but you can also associate the public IP?
Every Azure VM create by a private IP address, then we can associate a public IP address to it.
Or can you reach instances by public IP when connected to the Azure
virtual network public IP even with private addressing in addition to
the public IP binding?
Yes, we can connect that VM with public IP address directly.
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.