I'm trying to setup a VPN connection from a VLAN in Azure to on-premise. We have two different ISP's on-premise and I want to setup Azure with a VPN connecting to both so that if the primary ISP is down Azure will try to connect using the secondary.
The problem is that I can't add two gateways to a single VLAN, and the one gateway will not let me add two VPN connection with the same IP address range. I can understand that if I wanted both to be active, but I want one to be standby and only used if the first disconnects.
Is this even possible? Any pointers would be great?
I have been looking at https://learn.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-highlyavailable#a-name--activeactiveonpremamultiple-on-premises-vpn-devices but that only covers active-active setup which is not what I want.
I want both VNET resouces and on-premise resources to reach each other via the same IP addresses no matter if it's the primary or secondary VPN that's connected.
I know that Azure has fail over on it's side via a standby gateway, but I want fail over when on-premise is down, not Azure.
Update
I know that Azure has fail over on it's side via a standby gateway,
but I want fail over when on-premise is down, not Azure.
Unfortunately, there is not an auto solution for on-premise failover, you could manually perform, which is the same as If the on-premises gateway IP change need to update the same entry. You need to update the local network gateway (Including the On-premises gateway IP and private range ) on the Azure side and the ISP settings where VPN is connected on the on-premise side. Please expect some downtime, because IPSEC session of ISAKMP, PH1 and PH2 Will again take place.
Besides, If you have more than one ISP and need a redundant connection to the Azure. Azure now supports redundant Site to Site VPNs.
Support multiple tunnels between a VNet and an on-premises site with automatic failover based on BGP
You can establish multiple connections between your Azure VNet and
your on-premises VPN devices in the same location. This capability
provides multiple tunnels (paths) between the two networks in an
active-active configuration. If one of the tunnels is disconnected,
the corresponding routes will be withdrawn via BGP and the traffic
automatically shifts to the remaining tunnels.
The following diagram shows a simple example of this highly available setup:
NOTE
BGP is supported on Azure VpnGw1, VpnGw2, VpnGw3, Standard and HighPerformance VPN gateways. Basic SKU is NOT supported.
BGP is supported on Route-Based VPN gateways only.
Related
I'm looking for a solution where I need establish another VPN gateway separate to the one I have in hub and spoke Architecture. I would need something like this on the diagram bellow. It seems that Azure does not support that. When I try to deploy extra VPN GW I'm getting message that this is not possible because peering with gateway transit exists. Does any one have Idea how to achieve something like this ? I'm googling for quite some time and can't find anything.
Required Azure Network
Found an MS document that can help you add additional Site-to-Site (S2S) connections to a VPN gateway that has an existing connection. This architecture is often referred to as a "multi-site" configuration. You can add a S2S connection to a VNet that already has a S2S connection, Point-to-Site connection, or VNet-to-VNet connection. There are some limitations when adding connections. Check the Prerequisites section in this article to verify before you start your configuration.
Prerequisites
• You are not configuring a new coexisting ExpressRoute and VPN Gateway configuration.
• You have a virtual network that was created using the Resource Manager deployment model with an existing connection.
• The virtual network gateway for your VNet is RouteBased. If you have a PolicyBased VPN gateway, you must delete the virtual network gateway and create a new VPN gateway as RouteBased.
• None of the address ranges overlap for any of the VNets that this VNet is connecting to.
• You have compatible VPN device and someone who is able to configure it. See About VPN Devices. If you aren't familiar with configuring your VPN device, or are unfamiliar with the IP address ranges located in your on-premises network configuration, you need to coordinate with someone who can provide those details for you.
• You have an externally facing public IP address for your VPN device.
Would suggest you follow this MS document to configure a connection
We have an Azure WebJob running on an App Service connected to a vNET via Point-to-Site connection.
That same vNET is then connected to the on-premise network via a Site-to-Site VPN connection.
Routing is set up so to the Site-to-Site conn so that that the IP range of the Azure vNET (172.27.0.0/24) is sent from OnPrem > Azure. This can be tested by logging in to a VM inside of the vNET to query on premise resources - this works fine, and as expected.
If the same request (to a REST API) is sent from the WebJob, things do not work.
The IP range of the Point-to-Site (172.27.1.144/28) does not intersect with that of the vNET, so i am wondering if we need to also route this range "back across" the Site-to-Site connection also?
Another alternative is that a routing table within Azure needs to have a manual entry, somehow?
Any tips on how to troubleshoot / get this working would be much appreciated.
The IP range of the Point-to-Site (172.27.1.144/28) does not intersect
with that of the vNET, so i am wondering if we need to also route this
range "back across" the Site-to-Site connection also?
You need to do that, indeed. Not only that, you need to configure this network range (172.27.1.144/28) on your on-premises router too - so it recognises and accepts the traffic.
But in order to make the routing from the Point-to-Site (Azure app service) to the on-premise over the Site-to-Site VPN Connection, you will need to use a Virtual Appliance which is capable of forwarding the traffic.
For sake of simplicity and cost savings, you could just use Azure Hybrid Connections to connect Azure Web App / Web Job to on-premise Resource.
You can also refer to the documentation here, which lists the limitations of connecting App Service Plan to a Virtual Network, namely:
There are some things that VNET Integration does not support
including:
mounting a drive
AD integration
NetBios
private site access
Please note the last one - private site access - this is your on-premises.
I have an application that different clients will connect to on Azure. Each of my customers needs to connect to their Corresponding own Server ONLY in Azure from their local networks.
What kind of connection (P2S,S2S) can i create from each of my customers PC to connect ONLY with their Server in Azure?
According to your scenario, I think P2S is better for you.
Site-to-Site configurations are between your on-premises location and Azure. This means that you can connect from any of your computers
located on your premises to any virtual machine or role instance
within your virtual network, depending on how you choose to configure
routing. This type of connection relies on an IPsec VPN appliance
(hardware or soft appliance), which must be deployed at the edge of
your network. To create this type of connection, you must have the
required VPN hardware and an externally facing IPv4 address.
If my understanding is correct, your customers clients are not in one location, they have different private IP. Based on my knowledge, you could not use S2S VPN.
Point-to-Site configurations let you connect from a single computer
from anywhere to anything located in your virtual network.
P2S VPN does not require a VPN device. It is better for your scenario.
More information about difference between a Site-to-Site connection and Point-to-Site please refer to this link.
We have a client who wants to connect their premises to Azure. Their main hindrance at this point is determining the best way to connect to Azure given their current connectivity configuration. They have two redundant ISP connections going to the head office for internet access. They want to be able to configure a VPN connection to Azure that would operate in a similar way i.e. if ISP A went down it would seamlessly use ISP B and vice versa. The normal multi-site VPN configuration does not fit this since there is one local network behind which means the network behind separate VPNs over each ISP would have overlapping IP address ranges which is not supported. Is such a configuration possible? (See diagram below)
Either that or is there a way to abstract the two ISP connections onto one VPN connection to Azure.
They’re currently considering using a Cisco ASA device to help with this. I’m not familiar with the features of this device so I cannot verify if it will solve their issue. I know there is also a Cisco ASAv appliance in the Azure marketplace don't know if that could also be a part of a possible solution if they went with such a device.
required vpn configuration
The Site-to-Site VPN capability in Azure does not allow for automatic failover between ISPs.
What you could do are the following
- Have automation task created that would re-create the local network and gateway connection upon failover. Manual and would take some RTO to get it up and running
- Use the Cisco CSRs to create a DMVPN mesh. You should be able to achieve the configuration you want using that option. You would use UDRs in Azure to ensure proper routing
I havent done it in Azure, but here is what you do in AWS (And I am sure there would be parallel in Azure)
Configure a "detached VGW" (virtual Private gateway) in aws. Use DMVPN cloud to connect CSRs to multi-site on-prem.
Also, for failover between ISPs you could have a look at DNS load balancing via a parallel to AWS's Route 53 in Azure.
Reference thread :
https://serverfault.com/questions/872700/vpc-transit-difference-between-detached-vgw-and-direct-ipsec-connection-csr100
I am running a few machines and we services in Windows azure that I would like to lock off to the rest of the world because of the confidential data that is on there. I have a few small things that make it harder to get at, but I would like to setup a VPN to lock it down. If I set up a VPN service on one of the VM's would I then be able to latch onto the virtual network I have setup there? What is the process in setting this up?
If your cloud service is in a VNET you can create a VPN gateway and connect to it using either a Site-to-Site VPN or a Point-to-Site VPN. The former is IT focused, requiring VPN router configuration - the latter is developer focused, and requires minimal configuration. When using either form of VPN it is possible to take your cloud service completely off the internet for inbound traffic - outbound traffic can go out regardless of what endpoints you define for your VM.