Does Asa support IKEv2 protocol?
But if you are running ASA with software code >= 9.3.2 then ASA supports third-party clients for IKEv2 protocol: KEv2 support was added to the ASA in release 8.4. For IKEv2 remote access, the ASA only supported Cisco AnyConnect 3.0+ clients and no other third-party IKEv2 clients.
How can I optimize the performance of the Asav virtual firewall?
The best way to maximize the performance of a remote access VPN termination is to make the ASA a dedicated remote access VPN termination. The performance of the ASAv virtual firewall changes depending on the performance of the installed server. For high-end models such as ASA5585 and FPR4100, SSL processing of the engine can be optimized.
What is the impact of remote access VPN on Cisco ASA/FTD?
However, as the number of remote access VPN users has rapidly increased, access is concentrated on the remote access VPN servers, Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD), which terminate the access, and the performance of ASA and FTD is reduced. There are quite a few cases that suffer from deterioration.
Do the ASAS still support easyvpn?
And in addition to the mentioned L2TP over IPsec, the ASAs still support the legacy EasyVPN with OS-build-in clients or third-party Clients like Shrew. Don't stop after you've improved your network!
Can I use Cisco AnyConnect instead of Cisco VPN client?
The AnyConnect Secure Mobility Client is the preferred Cisco client option. It is actively updated and includes support for both IPsec and SSL VPN options. AnyConnect profiles are configured at the VPN server side and deployed to the client, and the AnyConnect client also supports IKEv2.
How do I access my Cisco ASA remotely?
There are eight basic steps in setting up remote access for users with the Cisco ASA.Configure an Identity Certificate.Upload the SSL VPN Client Image to the ASA.Enable AnyConnect VPN Access.Create a Group Policy.Configure Access List Bypass.Create a Connection Profile and Tunnel Group.Configure NAT Exemption.More items...•
What VPN types are supported by ASA?
For VPN Services, the ASA 5500 Series provides a complete remote-access VPN solution that supports numerous connectivity options, including Cisco VPN Client for IP Security (IPSec), Cisco Clientless SSL VPN, network-aware site-to-site VPN connectivity, and Cisco AnyConnect VPN client.
Can Cisco ASA do route based VPN?
ASA supports route-based VPN with the use of Virtual Tunnel Interfaces (VTIs) in version 9.8 and later.
What is remote access VPN Cisco?
Remote access VPNs allow users to connect to a central site through a secure connection over a TCP/IP network such as the Internet. Remote access VPNs for IPsec IKEv2. 8.4(1) Added IPsec IKEv2 support for the AnyConnect Secure Mobility Client.
How does remote access VPN Work?
A remote access VPN works by creating a virtual tunnel between an employee's device and the company's network. This tunnel goes through the public internet but the data sent back and forth through it is protected by encryption and security protocols to help keep it private and secure.
What are the four types of VPN?
Virtual Private Network (VPN) services fall into four main types: personal VPNs, remote access VPNs, mobile VPNs, and site-to-site VPNs....How Personal VPNs WorkInstall software from your VPN service provider onto your device. ... Connect to a server in your VPN provider's network.More items...•
What are the two types of VPN connections?
Types of VPNsSite-to-Site VPN: A site-to-site VPN is designed to securely connect two geographically-distributed sites. ... Remote Access VPN: A remote access VPN is designed to link remote users securely to a corporate network.More items...
What are 3 types of VPN tunnels?
We'll look at three of the most common: IPsec tunnels, Dynamic multi point VPNs, and MPLS-based L3VPNs.IPsec Tunnels. In principle, a network-based VPN tunnel is no different from a client-based IPsec tunnel. ... Dynamic Multi point VPN (DMVPN) ... MPLS-based L3VPN.
What is the difference between route-based and policy-based VPN?
In a policy-based VPN configuration, the action must be permit and must include a tunnel. Route-based VPNs support the exchange of dynamic routing information through VPN tunnels. You can enable an instance of a dynamic routing protocol, such as OSPF, on an st0 interface that is bound to a VPN tunnel.
What are route-based VPN?
A route-based VPN is a configuration in which an IPsec VPN tunnel created between two end points is referenced by a route that determines which traffic is sent through the tunnel based on a destination IP address.
Does Cisco ASA support VTI?
About Virtual Tunnel Interfaces The ASA supports a logical interface called Virtual Tunnel Interface (VTI).
How do I connect to Cisco ASA?
Complete the below steps.Configure the management interface. conf t. int e 0/2. ip address 192.168.100.2 255.255.255.0. nameif manage. security-level 80. exit. exit.Configure the username and privilege. username Test password Test@Cisco privilege 15.Configure the Cisco ASA to allow http connections.
How do I enable VPN on ASA?
Set up VPN on a Cisco ASA deviceOpen ASDM.Go to Wizards VPN Wizards. IPsec (IKEv1) Remote Access VPN Wizard.Bypass the interface access lists: ... Click Next.Choose Microsoft Windows client using L2TP over IPsec and check the box for MS-CHAP-V2.Click Next.Authenticate the machine: ... Click Next.More items...
How do I download AnyConnect from Asa?
Just load a new image to the ASA (under Configuration -> Remote-Access VPN -> Network (Client) Access -> AnyConnect Client Software) and the client will load the new software the next time when the client connects. Of course the client shouldn't have a setting applied to not download new software.
How install AnyConnect Cisco ASA?
Configure AnyConnect ConnectionsConfigure the ASA to Web-Deploy the Client.Enable Permanent Client Installation.Configure DTLS.Prompt Remote Users.Enable AnyConnect Client Profile Downloads.Enable AnyConnect Client Deferred Upgrade.Enable DSCP Preservation.Enable Additional AnyConnect Client Features.More items...•
About Remote Access IPsec VPNs
Remote access VPNs allow users to connect to a central site through a secure connection over a TCP/IP network. The Internet Security Association and Key Management Protocol, also called IKE, is the negotiation protocol that lets the IPsec client on the remote PC and the ASA agree on how to build an IPsec Security Association.
Configuration Examples for Remote Access IPsec VPNs
The following example shows how to configure a remote access IPsec/IKEv1 VPN:
Configuration Examples for Standards-Based IPSec IKEv2 Remote Access VPN in Multiple-Context Mode
The following examples show how to configure ASA for Standards-based remote access IPsec/IKEv2 VPN in multi-context mode. The examples provide information for the System Context and User Context configurations respectively.
Configuration Examples for AnyConnect IPSec IKEv2 Remote Access VPN in Multiple-Context Mode
The following examples show how to configure ASA for AnyConnect remote access IPsec/IKEv2 VPN in multi-context mode. The examples provide information for the System Context and User Context configurations respectively.
Cisco ASA non-VPN Configurations
The interface configuration is self-explanatory, ASA has two interfaces, one for the user and another one for the Internet. The default route is pointing to the ISP router with a static route. There are two objects, one for the branch user subnet and another one for the HQ webserver subnet.
ASA VPN configurations IKEv1
Please note that if you already have another VPN tunnel then most likely most of the configurations are already done for you. So, please make sure not to change or override them.
ASA VPN configurations IKEv2
I'm going to remove all the IKEv1 related configurations and then re-configure the VPN using IKEv2. The configuration is almost identical to IKEv1.
Why is Cisco ASA vulnerable?
The vulnerability is due to an error in handling a client crafted certificate during the authentication phase. An attacker could exploit this vulnerability by trying to authenticate to the affected system using a crafted certificate. An exploit could allow the attacker to bypass the certificate authentication. Depending on the Cisco ASA configuration, this may allow the attacker to authenticate and access the network via Clientless or Anyconnect SSL VPN or to get administrative management access via Cisco Adaptive Security Device Management (ASDM).
What is a vulnerability in Cisco ASA?
A vulnerability in the authentication code of the remote access VPN feature of Cisco ASA Software could allow an unauthenticated, remote attacker to bypass the remote VPN authentication, which could allow remote access to the inside network.
How to disable ICMP policy?
To disable the default ICMP policy use the icmp deny any command for all the configured interfaces of the Cisco ASA Software. To disable the default ICMP policy for ICMPv6 use the ipv6 icmp deny any command for all the IPv6 enabled interfaces of the Cisco ASA Software. The following example shows how to disable the default ICMP policy and default ICMP policy for ICMPv6 on the outside interface
Why is my VPN vulnerable?
The vulnerability is due to an error in the code that decrypts packets transiting an active VPN tunnel. In particular the code is failing at properly handling crafted ICMP packets after a decryption operation. An attacker could exploit this vulnerability by sending crafted ICMP packets through an active VPN tunnel. An exploit could allow the attacker to cause a reload of the device that performs the decryption operation.
What to do if Cisco is not clear?
If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
What is a stand-alone copy of a distribution URL?
A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors. The information in this document is intended for end-users of Cisco products.
Is inspection of DNS traffic over TCP supported by Cisco ASA?
Note: Inspection of DNS traffic over TCP is currently not supported by the Cisco ASA Software. Implementing this workaround does not create any loss in functionality.