How do I configure a crypto IKEv2 remote-access profile?
Here is an example configuration: When you create the profile, the HostAddress must match the Certificate Name (CN) on the certificate that is used for IKEv2. Enter the crypto ikev2 remote-access trustpoint command in order to define this.
How do I define A usergroup for the IKEv2 remote-access trustpoint?
Enter the crypto ikev2 remote-access trustpoint command in order to define this. The UserGroup must match the name of the tunnelgroup to which the IKEv2 connection falls. If they do not match, the connection often fails and the debugs indicate a Diffie-Hellman (DH) group mismatch or a similar false negative.
How do I enable IPsec IKEv2 on AnyConnect?
NOTE: The AnyConnect client protocol defaults to SSL. To enable IPsec IKEv2, you must configure the IKEv2 settings on the ASA and also configure IKEv2 as the primary protocol in the client profile. The IKEv2enabled profile must be deployed to the endpoint computer, otherwise the client attempts to connect using SSL.
How do I set the hostaddress for my IKEv2 profile?
When you create the profile, the HostAddress must match the Certificate Name (CN) on the certificate that is used for IKEv2. Enter the crypto ikev2 remote-access trustpoint command in order to define this.
What is a certificate referenced by trustpoints?
Certificates that are referenced by trustpoints need several bits to make them valid on a given device. The certificate itself is just one of those bits. You also need the private key that was used to generate the Certificate Signing Request (CSR). Without that, the certificate is invalid.
What is the other bit in a certificate chain?
The other bits are any intermediate certificates in the chain between the public trusted root CA and the signing CA. That's also known as the certificate chain and is us ally available from the public CA's web site in various formats.
Can you use a certificate with a private key?
You can only use the certificate associated with your ASA's private key. It is also the certificate which has your ASA's FQDN as the Common Name (CN). That's what makes the whole chain of trust concept work.
Can you look at a crypto certificate?
You can look at the certificate with "show crypto ca certificate". But anyhow, if you export it on the old ASA and import it on the new one, it will have the same "trust-status" as before.
IKEv2 IPSec Remote Access VPN with Anyconnect on Cisco ASA
The Cisco AnyConnect Secure Mobility Solution provides a comprehensive, highly secure enterprise mobility solution. the Cisco AnyConnect Secure Mobility Solution continues to lead with next-generation security and encryption, including support for the Suite B set of cryptographic algorithms, and support for IPv6 networks.
Filtering Routes in BGP using Route-maps and Prefix-list
Order of preference of attributes in BGP The order of preference varies based on whether the attributes are applied for inbound updates or outbound updates.
Ansible-playbook for backing up running config of Cisco IOS
This ansible-playbook can be used to backup running configuration from Cisco IOS devices. You can refer to my earlier post Getting Started with your first ansible-playbook for Network Automation to know about the parameters used in this playbook.
Export or Backup Azure Virtual Networks or Subnet information into CSV using PowerShell
There may be times when you want to get a report that contains information of all VNETS along with their subnets and address prefixes. You might have question, how to export or backup Azure VNET or subnets information into CSV.
Ansible Playbook for Network OS Upgrade with pre and post checks
You have 100s of network switches or routers that you need to upgrade. How much time would it take for you to do the upgrades? There are a lot number of sub-tasks involved while upgrading IOS image of a Cisco router or a switch.
Export or Backup Azure Route Table into CSV using PowerShell
There could be many use cases where you may want to export Azure route tables into CSV. Here is the PowerShell script that you can use to export Azure Route Tables into CSV using PowerShell script. This script will export Azure Route Tables along with routes of all Active subscriptions into a CSV.
Download Visio Stencils for Network Topology
Microsoft Visio is a great way to draft network diagrams for documentation, and network diagrams looks more nice if correct icons are used for the devices. So, download the Visio stencils from the following link. If you have more such links, you can post them in comments and they will be added here.
How to use IKEv2 in ASA?
If Web Launch was configured, on the client open up a web-browser and log into the ASA. The client will self download and install. It will connect with TLS/DTLS first. If you disconnect, quit the client, then restart the client there will be a drop down entry for the IKEv2 connection. Select it and the client will initate using IKEv2.
Is the server certificate for the secondary connection trusted?
The server certificate for the secondary connection is not trusted.
Does RFC 4809 prevent IKE?
Although RFC 4809 states the Extended Key Usage (or the lack of) extension within the client and server certificate should not prevent successful IKE establishment the ASA has a set of requirements:
Is IKEv2 better than SSL?
A) You are correct, the license used is the same. Generally for most enterprise deployments SSL is better and more flexible. The IKEv2 feature was primarily added not as a migration path from the EzVPN client but to meet many customer's legal/PCI/HIPPA/etc requirements that stated IKEv2 must be used. As you can tell it is a little more complex to setup. Unless you have a specific requirement to use IKEv2 it is probably better just to stick with TLS/SSL.
Configuring IKEv2 keyring
An IKEv2 keyring is a repository of symmetric and asymmetric preshared keys and is independent of the IKEv1 key ring. The IKEv2 keyring is associated with an IKEv2 profile and hence supports a set of peers that match the IKEv2 profile. The IKEv2 key ring gets its VPN routing and forwarding (VRF) context from the associated IKEv2 profile.
Configuring IKEv2 proposal
KEv2 proposal is a collection of transforms used in the negotiation of Internet Key Exchange (IKE) security associations (SAs) as part of the IKE_SA_INIT exchange. The transform types used in the negotiation are as follows:
IKEv2 Policy
An IKEv2 policy contains proposals that are used to negotiate the encryption, integrity, PRF algorithms, and DH group in the IKE_SA_INIT exchange. It can have match statements, which are used as selection criteria to select a policy during negotiation.
Configuring IKEv2 Profile
An IKEv2 profile is a repository of nonnegotiable parameters of the IKE SA, such as local or remote identities and authentication methods and services that are available to authenticated peers that match the profile. An IKEv2 profile must be attached to either a crypto map or an IPSec profile on the initiator.
IPsec transform set
A Transform Set is used to define how the data traffic between IPSec peers is going to be operated and protected.
Crypto Map
Crypto Maps are used to connect all the pieces of IPSec configuration together. A Crypto Map consists of one or more entries as an ACL, Transform Set, Remote Peer, the lifetime of the data connections etc
Verification – generating interesting traffic
Ping from one PC to another. I’ve used this as the advanced ping from Branch/HQ routers did not work
