You can configure a Site-to-Site VPN to a virtual network gateway over an ExpressRoute private peering using an RFC 1918 IP address. This configuration provides the following benefits:
Traffic over private peering is encrypted.
Point-to-site users connecting to a virtual network gateway can use ExpressRoute (via the Site-to-Site tunnel) to access on-premises resources.
It's possible to deploy Site-to-Site VPN connections over ExpressRoute private peering at the same time as Site-to-Site VPN connections via the Internet on the same VPN gateway.
This feature is only available for standard-IP based gateways.
Prerequisites
To complete this configuration, verify that you meet the following prerequisites:
You have a functioning ExpressRoute circuit that is linked to the virtual network where the VPN gateway is (or will be) created.
You can reach resources over RFC1918 (private) IP in the virtual network over the ExpressRoute circuit.
Routing
Figure 1 shows an example of VPN connectivity over ExpressRoute private peering. In this example, you see a network within the on-premises network that is connected to the Azure hub VPN gateway over ExpressRoute private peering. An important aspect of this configuration is the routing between the on-premises networks and Azure over both the ExpressRoute and VPN paths.
Establish ExpressRoute connectivity with an ExpressRoute circuit and private peering.
Establish the VPN connectivity using the steps in this article.
Traffic from on-premises networks to Azure
For traffic from on-premises networks to Azure, the Azure prefixes are advertised via both the ExpressRoute private peering BGP, and the VPN BGP if BGP is configured on your VPN gateway. The result is two network routes (paths) toward Azure from the on-premises networks:
• One network route over the IPsec-protected path.
• One network route directly over ExpressRoute without IPsec protection.
To apply encryption to the communication, you must make sure that for the VPN-connected network in Figure 1, Azure routes via the on-premises VPN gateway are preferred over the direct ExpressRoute path.
Traffic from Azure to on-premises networks
The same requirement applies to the traffic from Azure to on-premises networks. To ensure that the IPsec path is preferred over the direct ExpressRoute path (without IPsec), you have two options:
• Advertise more specific prefixes on the VPN BGP session for the VPN-connected network. You can advertise a larger range that encompasses the VPN-connected network over ExpressRoute private peering, then more specific ranges in the VPN BGP session. For example, advertise 10.0.0.0/16 over ExpressRoute, and 10.0.1.0/24 over VPN.
• Advertise disjoint prefixes for VPN and ExpressRoute. If the VPN-connected network ranges are disjoint from other ExpressRoute connected networks, you can advertise the prefixes in the VPN and ExpressRoute BGP sessions respectively. For example, advertise 10.0.0.0/24 over ExpressRoute, and 10.0.1.0/24 over VPN.
In both of these examples, Azure will send traffic to 10.0.1.0/24 over the VPN connection rather than directly over ExpressRoute without VPN protection.
Warning
If you advertise the same prefixes over both ExpressRoute and VPN connections, Azure will use the ExpressRoute path directly without VPN protection.
Portal steps
Configure a Site-to-Site connection. For steps, see the Site-to-site configuration article. Be sure to pick a gateway with a Standard Public IP.
Enable Private IPs on the gateway. Select Configuration, then set Gateway Private IPs to Enabled. Select Save to save your changes.
On the Overview page, select See More to view the private IP address. Write down this information to use later in the configuration steps. If you have an active-active mode VPN gateway, you'll see two private IP addresses.
To enable Use Azure Private IP Address on the connection, go to the Configuration page. Set Use Azure Private IP Address to Enabled, then select Save.
Use the private IP address that you wrote down in step 3 as the remote IP on your on-premises firewall to establish the Site-to-Site tunnel over the ExpressRoute private peering.
Note
Configuring BGP on your VPN gateway is not required to achieve a VPN connection over ExpressRoute private peering.
PowerShell steps
Configure a Site-to-Site connection. For steps, see the Configure a Site-to-Site VPN article. Be sure to pick a gateway with a Standard Public IP.
Set the flag to use the private IP on the gateway using the following PowerShell commands:
$Gateway = Get-AzVirtualNetworkGateway -Name <name of gateway> -ResourceGroup <name of resource group>Set-AzVirtualNetworkGateway -VirtualNetworkGateway $Gateway -EnablePrivateIpAddress $true
You should see a public and a private IP address. Write down the IP address under the “TunnelIpAddresses” section of the output. You'll use this information in a later step.
Set the connection to use the private IP address by using the following PowerShell command:
$Connection = get-AzVirtualNetworkGatewayConnection -Name <name of the connection> -ResourceGroupName <name of resource group>Set-AzVirtualNetworkGatewayConnection --VirtualNetworkGatewayConnection $Connection -UseLocalAzureIpAddress $true
From your firewall, ping the private IP that you wrote down in step 2. It should be reachable over the ExpressRoute private peering.
Use this private IP as the remote IP on your on-premises firewall to establish the Site-to-Site tunnel over the ExpressRoute private peering.
Next steps
For more information about VPN Gateway, see What is VPN Gateway?
Ans.) Azure ExpressRoute establishes a dedicated, private connection between your on-premises infrastructure and Azure, whereas Azure VPN Gateway establishes a virtual private network (VPN) between your on-premises infrastructure and Azure using a public internet connection.
You must use a route-based VPN gateway. You also can use a route-based VPN gateway with a VPN connection configured for 'policy-based traffic selectors' as described in Connect to multiple policy-based VPN devices.
You can set up bi-directional connectivity between your core network and Azure virtual networks (VNets). This peering lets you connect to virtual machines and cloud services directly on their private IP addresses. You can connect more than one virtual network to the private peering domain.
A site-to-site (S2S) VPN gateway connection is a connection over IPsec/IKE (IKEv1 or IKEv2) VPN tunnel. Site-to-site connections can be used for cross-premises and hybrid configurations. A site-to-site connection requires a VPN device located on-premises that has a public IP address assigned to it.
Each ExpressRoute circuit consists of two connections to two Microsoft Enterprise edge routers (MSEEs) at an ExpressRoute Location from the connectivity provider or your network edge. Microsoft requires dual BGP connections from the connectivity provider or your network edge – one to each MSEE.
Site-to-Site, Point-to-Site, and VNet-to-VNet connections all use a VPN gateway. ExpressRoute - To send network traffic on a private connection, you use the gateway type 'ExpressRoute'. This type of gateway is also referred to as an ExpressRoute gateway and is used when configuring ExpressRoute.
2 answers. You can only have 1 Virtual Network Gateway per Virtual Network - however, you can peer the virtual networks, to communicate across them with gateway transit, or have multiple S2S VPNs across the same gateway. Depending on your use case - make sure you take a look at Azure Virtual WAN.
Main Mode - Used when VPN Sites have permanent/Static public IP address. Aggressive Mode - Used when One Site has permanent/static public IP and the other site has a dynamic/temporary public IP address. Hub and Spoke - Setting up VPNs when two or more remote sites (Spokes) want to connect to central site (Hub).
While a VPN encrypts data sent over the internet, VPC peering uses the Amazon network to send information between VPCs. A quick and easy way to connect VPCs is through VPC peering. The data is sent securely via the AWS network without the need for any specialized hardware or software.
VPN and VNet Peering are essential tools for connecting and securing networks in Azure. While VPN provides a secure and encrypted connection ideal for communications over the public internet, VNet Peering offers fast and direct connections between virtual networks within Azure.
ExpressRoute provides a fast and reliable connection to Azure with bandwidths up to 100 Gbps, which makes it an excellent and cost-effective option for scenarios like periodic data migration, replication for business continuity, disaster recovery, and other high-availability strategies.
Private peering is when two networks agree to exchange their traffic directly via a dedicated IP connection. Private peering is often preferred when a massive amount of network traffic needs to be exchanged.
The two types of VPNs with site-to-site configurations are intranet-based (for connecting remote locations within the same organization) and extranet-based (for connecting with external partners).
For example, OpenVPN Access Server is a marketplace solution for a VPN gateway. After you activate the appliance, you deploy a host VM for the gateway that allows transit to VMware Engine networks.
A remote access VPN connects remote users from any location to a corporate network.A site-to-site VPN, meanwhile, connects individual networks to each other.
A remote access VPN connects remote users from any location to a corporate network.A site-to-site VPN, meanwhile, connects individual networks to each other.
Use Azure ExpressRoute to create private connections between Azure datacenters and infrastructure on premises or in a colocation environment. ExpressRoute connections don't route through the public internet, and they offer more reliability, faster speed, and lower latency than typical internet connections.
Site to site VPN does not need setup on each client.Remote access VPN may or may not needed setup on each client.Site to site VPN does not require every user to initiate the VPN tunnel setup. Remote access VPN require every remote access user to initiate the VPN tunnel setup.
AWS Direct Connect offers flexibility in terms of the number of virtual interfaces and private or public VIFs, while ExpressRoute offers private and Microsoft peering. Quotas and Limits.
Introduction: My name is Fr. Dewey Fisher, I am a powerful, open, faithful, combative, spotless, faithful, fair person who loves writing and wants to share my knowledge and understanding with you.
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