Full Answer
How does Cisco Easy VPN work with IPsec?
When the IPSec client initiates the VPN tunnel connection, the IPSec server pushes the IPSec policies to the IPSec client and creates the corresponding VPN tunnel connection. Note The Cisco Easy VPN client feature supports configuration of only one destination peer.
What is a remote access VPN?
Remote access VPNs are used by remote clients to log in to a corporate network. The example in this chapter illustrates the configuration of a site-to-site VPN that uses IPSec and the generic routing encapsulation (GRE) protocol to secure the connection between the branch office and the corporate network.
How do I configure multiple VPN tunnels with Cisco Easy VPN client?
Note The Cisco Easy VPN client feature supports configuration of only one destination peer. If your application requires creation of multiple VPN tunnels, you must manually configure the IPSec VPN and Network Address Translation/Peer Address Translation (NAT/PAT) parameters on both the client and the server.
Which Cisco routers support VPNs?
The Cisco 850 and Cisco 870 series routers support the creation of virtual private networks (VPNs).
Does remote access VPN use IPsec?
While Remote access VPN supports SSL and IPsec technology.
What is IPsec remote access?
The IPsec Remote Access feature introduces server support for the Cisco VPN Client (Release 4. x and 5. x) software clients and the Cisco VPN hardware clients. This feature allows remote users to establish the VPN tunnels to securely access the corporate network resources.
Is Cisco VPN IPsec?
VPN tunnels are used to connect physically isolated networks that are more often than not separated by nonsecure internetworks. To protect these connections, we employ the IP Security (IPSec) protocol to make secure the transmission of data, voice, and video between sites.
How do I enable IPsec on a Cisco router?
To configure the IPSec VPN tunnel on Cisco 881 ISR:Configure the ISAKMP Policy. ... Enable NAT Keepalive. ... Configure the IPSec Peer. ... Define the IPSec Transform Set. ... Enable IPSec Fragmentation. ... Configure the IPSec Profile. ... Create the Tunnel Interfaces. ... Create the Access Control List (ACL)More items...
Is IPsec the same as VPN?
The major difference between an IPsec VPN and an SSL VPN comes down to the network layers at which encryption and authentication are performed. IPsec operates at the network layer and can be used to encrypt data being sent between any systems that can be identified by IP addresses.
Is IPsec VPN better than SSL VPN?
When it comes to corporate VPNs that provide access to a company network rather than the internet, the general consensus is that IPSec is preferable for site-to-site VPNs, and SSL is better for remote access.
How does Cisco IPSec work?
With the Cisco Secure VPN Client, you use menu windows to select connections to be secured by IPSec. When interesting traffic is generated or transits the IPSec client, the client initiates the next step in the process, negotiating an IKE phase one exchange.
Is Cisco Anyconnect IPSec or SSL?
Anyconnect is the replacement for the old Cisco VPN client and supports SSL and IKEv2 IPsec. When it comes to SSL, the ASA offers two SSL VPN modes: Clientless WebVPN.
How do I know if my IPSec tunnel is up on a Cisco router?
You can do a "show crypto ipsec sa detail" and a "show crypto isakmp sa detail" both of them will give you the remaining time of the configured lifetime. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE.
How do I enable IPsec?
How do I enable IPSec on a machine?Right click on 'My Network Places' and select Properties.Right click on 'Local Area Connection' and select Properties.Select 'Internet Protocol (TCP/IP)' and click Properties.Click the Advanced button.Select the Options tab.Select 'IP security' and click Properties.More items...
How do I configure IPsec?
Configuring authentication methodIn the administration interface, go to Interfaces.Click Add > VPN Tunnel.Type a name of the new tunnel.Set the tunnel as active and type the hostname of the remote endpoint. ... Select Type: IPsec.Select Preshared key and type the key.More items...
How do I set up IPsec?
Configuring the Server sideIn the administration interface, go to Interfaces.Double-click on VPN Server.In the VPN Server Properties dialog box, check Enable IPsec VPN Server. ... On tab IPsec VPN, select a valid SSL certificate in the Certificate pop-up list.Check Use preshared key and type the key.Save the settings.
What is IPsec and how it works?
IPsec is a group of protocols that are used together to set up encrypted connections between devices. It helps keep data sent over public networks secure. IPsec is often used to set up VPNs, and it works by encrypting IP packets, along with authenticating the source where the packets come from.
What does IPsec stand for?
What Does IPSEC Stand for and What Does It Do? IPSEC stands for IP Security. It is an Internet Engineering Task Force (IETF) standard suite of protocols between 2 communication points across the IP network that provide data authentication, integrity, and confidentiality.
What are the 3 protocols used in IPsec?
IPsec is a suite of protocols widely used to secure connections over the internet. The three main protocols comprising IPsec are: Authentication Header (AH), Encapsulating Security Payload (ESP), and Internet Key Exchange (IKE).
What are the benefits of IPsec?
IPsec provides the following security services for traffic at the IP layer: Data origin authentication—identifying who sent the data. Confidentiality (encryption)—ensuring that the data has not been read en route. Connectionless integrity—ensuring the data has not been changed en route.
What routers support virtual private networks?
The Cisco 850 and Cisco 870 series routers support the creation of virtual private networks (VPNs).
What is IP security in GRE?
Note When IP Security (IPSec) is used with GRE, the access list for encrypting traffic does not list the desired end network and applications, but instead refers to the permitted source and destination of the GRE tunnel in the outbound direction. All packets forwarded to the GRE tunnel are encrypted if no further access control lists (ACLs) are applied to the tunnel interface.
What is crypto map?
The crypto maps must be applied to each interface through which IPSec traffic flows. Applying the crypto map to the physical interface instructs the router to evaluate all the traffic against the security associations database. With the default configurations, the router provides secure connectivity by encrypting the traffic sent between remote sites. However, the public interface still allows the rest of the traffic to pass and provides connectivity to the Internet.
What is a VPN client?
VPN client—Another router, which controls access to the corporate network. LAN interface—Connects to the corporate network, with inside interface address of 10.1.1.1. GRE tunnels are typically used to establish a VPN between the Cisco router and a remote device that controls access to a private network, such as a corporate network.
What are the two types of VPNs?
Two types of VPNs are supported—site-to-site and remote access. Site-to-site VPNs are used to connect branch offices to corporate offices, for example. Remote access VPNs are used by remote clients to log in to a corporate network. The example in this chapter illustrates the configuration of a site-to-site VPN that uses IPSec and ...
Can you negotiate with a peer in a security association?
Note With manually established security associations, there is no negotiation with the peer , and both sides must specify the same transform set.
What is Cisco Easy VPN?
The Cisco Easy VPN client feature eliminates much of the tedious configuration work by implementing the Cisco Unity Client protocol. This protocol allows most VPN parameters, such as internal IP addresses, internal subnet masks, DHCP server addresses, WINS server addresses, and split-tunneling flags, to be defined at a VPN server, such as a Cisco VPN 3000 series concentrator that is acting as an IPSec server.
What is a Cisco 870 router?
The Cisco 870 series routers support the creation of Virtual Private Networks (VPNs). Cisco routers and other broadband devices provide high-performance connections to the Internet, but many applications also require the security of VPN connections which perform a high level of authentication and which encrypt the data between two particular ...
What is crypto map?
The crypto maps must be applied to each interface through which IP Security (IPSec) traffic flows . Applying the crypto map to the physical interface instructs the router to evaluate all the traffic against the security associations database. With the default configurations, the router provides secure connectivity by encrypting the traffic sent between remote sites. However, the public interface still allows the rest of the traffic to pass and provides connectivity to the Internet.
What are the two types of VPNs?
Two types of VPNs are supported—site-to-site and remote access. Site-to-site VPNs are used to connect branch offices to corporate offices, for example. Remote access VPNs are used by remote clients to log in to a corporate network. The example in this chapter illustrates the configuration of a remote access VPN that uses ...
Does Cisco 850 support VPN?
Note The material in this chapter does not apply to Cisco 850 series routers. Cisco 850 series routers do not support Cisco Easy VPN.
Can you negotiate with a peer in a security association?
Note With manually established security associations, there is no negotiation with the peer , and both sides must specify the same transform set.
Does Cisco Easy VPN support multiple destinations?
Note The Cisco Easy VPN client feature supports configuration of only one destination peer. If your application requires creation of multiple VPN tunnels, you must manually configure the IPSec VPN and Network Address Translation/Peer Address Translation (NAT/PAT) parameters on both the client and the server.
Which is newer, IPSEC or crypto?
NOTE: you can also create a crypto map which is the legacy way, while IPSEC profile is the newer way.
What does IKE stand for in IPSEC?
IKE stands for Internet Key exchange, it is the version 2 of the IKE and it has been created to provide a better solution than IKEv1 in setting up security association (SA) in IPSEC.
