The requirements are: IKE1 or IKE2 AES256 or AES128 or 3DES SHA1 or MD5 NAT-Traversal capability (some clouds require NAT-Traversal encapsulation - AWS Generic EC2, Microsoft Azure, etc.) A diagram of the typical secure hybrid cloud setup using VNS3 is provided on the right.
Check your device's data sheet to see if it is compatible with VNS3. Public Cloud Overlay Network Subnet: /24 Many network hardware devices support IPsec tunneling functionality. We will focus on the Site-to-Site or LAN-to-LAN setup most often used with VNS3 to build Hybrid Clouds. IPsec ensure private and secure communication between two devices. I also had to create the Access Rule under Firewall for the VTI interface to allow the desired traffic to flow.1 VNS3 to Cisco ASA Instructions ASDM 9.2 IPsec Configuration Guide 2016Ģ Site-to-Site IPsec Tunnel IPsec protocol allows you to securely connect two sites together over the public internet using cryptographically secured services. (policy derived from connection attempts and scattered documentation from Azure – other options available if required) Priority : Whatever you decide (1 in my case) When setting up through ASDM, I also ran into the issue that the connection was not established / the VTI interface stayed down down.Īfter investigating the logs on the ASA and using the Troubleshooting VPN component on the Azure Virtual Network Gateway, I discovered I needed to enable IKE v2 on our ASA outside interface and create an IKEv2 Policy.įor anyone who experienced the same issue:Ĭonfiguration > Site-to-Site VPN > Connection Profiles > Access Interfaces > Check “Allow IKE v2 Access” on “outside”Ĭonfiguration > Site-to-Site VPN > Advanced > IKE Policies > Add Give it a test by trying to RDP onto one of your Azure servers from a client on a network defined in you Azure local network’s address spaces.Add additional routes to any other subnets.Gateway IP: 169.254.225.2 (Our next hop is one up from the IP we set on the VTP Interface).Network: The Azure Virtual Network or virtual network gateway is on, or you could add a subnet from that network if you don’t want the whole network.Interface: AZURE-VTI01 (as we created in the VTI Interface section).Navigate to Configuration -> Device Setup -> Routing -> Static Routes.In this example with will use a static route, but if you have a more complex setup BGP is an option. The last step is to define what destination(s) we will be routed over the VPN. Ikev2 remote-authentication pre-shared-key MyVerySecureKey Ikev2 local-authentication pre-shared-key MyVerySecureKey Name: AZURE-PROPOSAL (Or whatever matches your naming convention).Add a net proposal in the IKE v2 section.Navigate to Configuration -> Site-to-Site-VPN -> Advanced -> IPSEC Proposals (Transformation Sets).Shared key (PSK): Pick as suitably complex string and make a note of it for laterĬonnect to your ASA using ASDM.Local network gateway: Select the previously created local network gateway.Virtual network gateway: Should be pre-filled with you Virtual network gateway.Navigate back into your previously created Virtual network gateway and click Connections.Location: Typically your virtual networks location.Resource Group: Your desired resource group.Address space: This where you add you om premise subnets/vlan’s using the networks CIDR for example 10.0.100.0/24.IP Address: This is the outside public IP address of your ASA.Under “Create a resource” in the top left search for and select “Local network gateway”.Next, we need a Local Network Gateway to define our ASA public IP address and the list of on-premise network(s) we want over the VPN. Location: Typically your virtual networks location.Public IP: Create new unless you already have a space and give it a name.Virtual Network: Whatever Azure network we are joining over the VPN.SKU: VpnGW1 (or higher, basic doesn’t support IKEv2).Name: Whatever matches your naming convention.Under “Create a resource” in the top left search for and select “Virtual network gateways”.If your Virtual Network already has a “Virtual network gateway” check your settings match then you can skip this section. You will need ASDM, I will be using 7.9.You ASA needs to be running at least 9.7 but 9.8 or higher is preferred.I am going to assume you are already using Azure and you already have a Virtual Network in place.
Cisco asa asdm ipsec how to#
We are also going to focus on how to achieve this using ASDM. We will be creating a route-based connection using IKEv2 and a VTI interface. In this post, we are going to link an Azure Virtual Network to an on-premise network via a Cisco ASA.
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