Pre-Shared Keys in IPsec. The following section is related to site-to-site VPNs only and NOT to remote access VPNs. The pre-shared key is merely used for authentication, not for encryption! IPsec tunnels rely on the ISAKMP/IKE protocols to exchange the keys for encryption, etc. Cisco Asa 5505 Activation Key Generator DOWNLOAD (Mirror #1).

IPsec Pre-Shared Key Generator. PSK Generator provides a secure process to negotiate a 64-byte IPsec Pre-Shared Key (also known as a Shared Secret or PSK) through insecure means, such as email. Note: This page uses client side javascript. It does not transmit any entered or calculated information. Learn more about this PSK Generator. Sean Wilkins goes over the high-level basics of how IPsec operates and how it can be configured on a Cisco ASA. IPsec IKEv1 Example—ASA1. Create and enter IKEv1 policy configuration mode. Asa2(config-tunnel-ipsec)#ikev1 pre-shared-key thisisakey. Create a crypto map and match based on the previously created ACL. Re: What is a good preshared key length. All depends what you are trying to protect and where. If relatively minor info, across an already private network it will be fine. If the info is troop movements, and it is to be carried across the internet, it may be a little weak! If the key is something like G66d-day (simply put numlock on a notebook). Asa 5505 Activation Key Generator: pin. Understanding Cisco ASA AnyConnect Licensing - TunnelsUP. How to IPsec to the Cisco ASA 5505 Firewall Using Pre-shared KB. Cisco Asa 5505 Activation Key Generator DOWNLOAD (Mirror #1).

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Azure S2S VPN connections provide secure, cross-premises connectivity between customer premises and Azure. This tutorial walks through IPsec S2S VPN connection life cycles such as creating and managing a S2S VPN connection. You learn how to:

• Create an S2S VPN connection
• Update the connection property: pre-shared key, BGP, IPsec/IKE policy
• Add more VPN connections
• Delete a VPN connection

The following diagram shows the topology for this tutorial:

Working with Azure Cloud Shell and Azure PowerShell

This article uses PowerShell cmdlets. To run the cmdlets, you can use Azure Cloud Shell. The Azure Cloud Shell is a free interactive shell that you can use to run the steps in this article. It has common Azure tools preinstalled and configured to use with your account.

To open the Cloud Shell, just select Try it from the upper right corner of a code block. You can also launch Cloud Shell in a separate browser tab by going to https://shell.azure.com/powershell. Select Copy to copy the blocks of code, paste it into the Cloud Shell, and press enter to run it.

Requirements

Complete the first tutorial: Create VPN gateway with Azure PowerShell to create the following resources:

1. Resource group (TestRG1), virtual network (VNet1), and the GatewaySubnet
2. VPN gateway (VNet1GW)

The virtual network parameter values are listed below. Note the additional values for the local network gateway which represent your on-premises network. Change the values below based on your environment and network setup, then copy and paste to set the variables for this tutorial. If your Cloud Shell session times out, or you need to use a different PowerShell window, copy and paste the variables to your new session and continue the tutorial.

Note

If you are using this to make a connection, be sure to change the values to match your on-premises network. If you are just running these steps as a tutorial, you don't need to make changes, but the connection will not work.

The workflow to create an S2S VPN connection is straightforward:

1. Create a local network gateway to represent your on-premises network
2. Create a connection between your Azure VPN gateway and the local network gateway

Create a local network gateway

A local network gateway represents your on-premises network. You can specify the properties of your on-premises network in the local network gateway, including:

• Public IP address of your VPN device
• On-premises address space
• (Optional) BGP attributes (BGP peer IP address and AS number)

Create a local network gateway with the New-AzLocalNetworkGateway command.

Create a S2S VPN connection

Next, create a Site-to-Site VPN connection between your virtual network gateway and your VPN device with the New-AzVirtualNetworkGatewayConnection. Notice that the '-ConnectionType' for Site-to-Site VPN is IPsec.

Add the optional '-EnableBGP $True' property to enable BGP for the connection if you are using BGP. It is disabled by default. Parameter '-ConnectionProtocol' is optional with IKEv2 as default. You can create the connection with IKEv1 protocols by specifying -ConnectionProtocol IKEv1.

Update the VPN connection pre-shared key, BGP, and IPsec/IKE policy

View and update your pre-shared key

Azure S2S VPN connection uses a pre-shared key (secret) to authenticate between your on-premises VPN device and the Azure VPN gateway. You can view and update the pre-shared key for a connection with Get-AzVirtualNetworkGatewayConnectionSharedKey and Set-AzVirtualNetworkGatewayConnectionSharedKey.

Important

The pre-shared key is a string of printable ASCII characters no longer than 128 in length.

This command shows the pre-shared key for the connection:

The output will be 'Azure@!b2C3' following the example above. Use the command below to change the pre-shared key value to 'Azure@!_b2=C3':

Enable BGP on VPN connection

Azure VPN gateway supports BGP dynamic routing protocol. You can enable BGP on each individual connection, depending on whether you are using BGP in your on-premises networks and devices. Specify the following BGP properties before enabling BGP on the connection:

• Azure VPN ASN (Autonomous System Number)
• On-premises local network gateway ASN
• On-premises local network gateway BGP peer IP address

If you have not configured the BGP properties, the following commands add these properties to your VPN gateway and local network gateway: Set-AzVirtualNetworkGateway and Set-AzLocalNetworkGateway.

Use the following example to configure BGP properties:

Enable BGP with Set-AzVirtualNetworkGatewayConnection. /create-table-with-auto-generated-primary-key-db2.html.

You can disable BGP by changing the '-EnableBGP' property value to $False. Refer to BGP on Azure VPN gateways for more detailed explanations of BGP on Azure VPN gateways.

Apply a custom IPsec/IKE policy on the connection

You can apply an optional IPsec/IKE policy to specify the exact combination of IPsec/IKE cryptographic algorithms and key strengths on the connection, instead of using the default proposals. The following sample script creates a different IPsec/IKE policy with the following algorithms and parameters:

• IKEv2: AES256, SHA256, DHGroup14
• IPsec: AES128, SHA1, PFS14, SA Lifetime 14,400 seconds & 102,400,000 KB

Refer to IPsec/IKE policy for S2S or VNet-to-VNet connections for a complete list of algorithms and instructions.

Add another S2S VPN connection

Add an additional S2S VPN connection to the same VPN gateway, create another local network gateway, and create a new connection between the new local network gateway and the VPN gateway. Use the following examples, making sure to modify the variables to reflect your own network configuration.

There are now two S2S VPN connections to your Azure VPN gateway.

Delete a S2S VPN connection

Delete a S2S VPN connection with Remove-AzVirtualNetworkGatewayConnection.

Delete the local network gateway if you no longer need it. You cannot delete a local network gateway if there are other connections associated with it.

Clean up resources

If this configuration is part of a prototype, test, or proof-of-concept deployment, you can use the Remove-AzResourceGroup command to remove the resource group, the VPN gateway, and all related resources.

Next steps

In this tutorial, you learned about creating and managing S2S VPN connections such as how to:

• Create an S2S VPN connection
• Update the connection property: pre-shared key, BGP, IPsec/IKE policy
• Add more VPN connections
• Delete a VPN connection

Advance to the following tutorials to learn about S2S, VNet-to-VNet, and P2S connections.

Configuring an IKE Policy for Preshared Keys

An IKE policy defines a combinationof security parameters (IKE proposals) to be used during IKE negotiation. It defines a peeraddress, the preshared key for the given peer, and the proposals needed for that connection.During the IKE negotiation, IKE looks for an IKE policy that is the same on both peers. Thepeer that initiates the negotiation sends all its policies to the remote peer, and the remotepeer tries to find a match.

A match is made when both policies from the two peers have a proposal thatcontains the same configured attributes. If the lifetimes are not identical, the shorter lifetimebetween the two policies (from the host and peer) is used. The configured preshared key mustalso match its peer.

You can create multiple, prioritized proposals at each peer to ensure thatat least one proposal will match a remote peer’s proposal.

First, you configure one or more IKE proposals; then you associate theseproposals with an IKE policy. You can also prioritize a list of proposals used by IKE in the policy statement atthe

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To specify a description for an IKE policy, include the [edit security ike policy mode statement andspecify main at the ike-peer-address] hierarchy level:

For Junos OS in FIPS mode, the aggressive option for IKEv1 is not supported with themode statement at the policy-name] hierarchy level.

Configuring the Preshared Key for an IKE Policy

IKE policy preshared keys authenticate peers. You must manually configurea preshared key, which must match that of its peer. The preshared key can be an ASCII text(alphanumeric) key or a hexadecimal key.

A local certificate is an alternative to the preshared key. A commit operation failsif either a preshared key or a local certificate is not configured.

To configure an IKE policy preshared key, include the [edit security ike policy proposals statementat the ike-peer-address] hierarchylevel and specify one or more proposal names:

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Example: Configuring an IKE Policy

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Define two IKE policies: policy 10.1.1.2and policy 10.1.1.1. Each policy is associated with proposal-2.

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Note

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Updates to the current IKE proposal and policy configuration arenot applied to the current IKE SA; updates are applied to newIKE SAs.

If you want the new updates to take immediate effect, you must clear theexisting IKE security associations so that they will be reestablished with the changed configuration.For information about how to clear the current IKE security association, see the CLI Explorer.