If you are able to ping, the tunnel is functioning properly. Instead, the VRF must be configured on the tunnel interface for SVTIs. DVTIs can provide highly secure and scalable connectivity for remote-access VPNs. As we have finished the configuration of the IPSec Tunnel between the Cisco ASA and Cisco Router. QoS features can be used to improve the performance of various applications across the network. Complete these steps to set up the IPsec VPN tunnel: 1. Configuring IPSec Phase 1 (ISAKMP Policy). You can add QoS to the DVTI tunnel by applying the service policy to the virtual template. Cisco IPsec Tunnel Mode Configuration In this lesson, I will show you how to configure two Cisco IOS routers to use IPSec in Tunnel mode. Perform this task to configure a dynamic IPsec VTI. This feature supports SVTIs that are configured to encapsulate IPv4 packets or IPv6 packets, but IPv4 packets cannot carry IPv6 packets, and IPv6 packets cannot carry IPv4 packets. When a packet arrives at the router through an interface, the Cisco CG-OS router applies any configured Policies to that interface such as ingress IP access control lists (IP ACLs) or QoS policies. The advantage of using SVTIs as opposed to crypto map configurations is that users can enable dynamic routing protocols on the tunnel interface without the extra 24 bytes required for GRE headers, thus reducing the bandwidth for sending encrypted data. The client can be a home user running a Cisco VPN client or it can be a Cisco IOS XE router configured as an Easy VPN client. . Security for VPNs with IPsec Configuration Guide, Cisco IOS Release 15M&T . You do not place the crypto maps on the loopbacks as routing is done BEFORE encryption. Configuring an IPsec Tunnel between Routers with Duplicate LAN Subnets, NATAbility to Use Route Maps with Static Translations, IP Security Troubleshooting - Understanding and Using debug Commands, IPsec Negotiation/IKE Protocols - Cisco Systems, Technical Support & Documentation - Cisco Systems. Ask a question or join the discussion by visiting our Community Forum, Get Full Access to our 751 Cisco Lessons Now, ICMP (Internet Control Messaging Protocol), 1.2: Network Implementation and Operation, 2.1a: Implement and troubleshoot switch administration, 2.1b Implement and troubleshoot L2 protocols, Introduction to VTP (VLAN Trunking Protocol), Spanning-Tree TCN (Topology Change Notification), 2.2a: IGMP (Internet Group Management Protocol), PPP Multilink Fragmentation and Interleaving (MLPPP), 3.2a: Troubleshoot Reverse Path Forwarding, 3.2b: PIM (Protocol Independent Multicast), 3.2c: Multicast Source Discovery Protocol (MSDP), 3.3l: BFD (Bidirectional Forwarding Detection), OSPFv3 IPsec Authentication and Encryption, EIGRP Loop-Free Alternate (LFA) Fast Reroute (FRR), OSPF Network Type Point-to-Multipoint Non-Broadcast, OSPF Next Hop IP Address with Different Network Types, OSPF Loop-Free Alternate (LFA) Fast Reroute (FRR), OSPF Remote Loop-Free Alternate (LFA) Fast Reroute (FRR), 3.7.c: Attributes and Best Path Selection, L2TPv3 (Layer 2 Tunnel Protocol Version 3), IPSec Static VTI Virtual Tunnel Interface, IPSec Dynamic VTI Virtual Tunnel Interface, AAA Configuration on Cisco Catalyst Switch, NBAR (Network Based Application Recognition), VRRP (Virtual Router Redundancy Protocol), 6.3d: IPv4 NAT (Network Address Translation), 6.3e: IPv6 NAT (Network Address Translation), Introduction to OER (Optimize Edge Routing), CCIE Routing & Switching Written 400-101 Practice Exam. Figure 6-1 shows a typical deployment scenario. 1 The inside local IP address of the headquarters network public server (10.1.6.5) is translated to inside global IP address 10.2.2.2 in the "Step 2Configuring Network Address Translation" section. Configuring the Phase 1 on the Cisco Router R2 R2#configure terminal Enter configuration commands, one per line. That would prevent the tunnel from coming up without affecting other tunnels. How to configure Cisco Router/Switch to enable SSH (Secure. The dynamic interface is created at the end of IKE Phase 1 and IKE Phase 1.5. VTIs allow you to establish an encryption tunnel using a real interface as the tunnel endpoint. This section provides information that you can use to confirm that your configuration is working properly. Below is a basic diagram of the topology involved. Anyone who is working on VPN setup using Cisco routers with IOS XE may use this configuration . The DVTI can accept multiple IPsec selectors that are proposed by the initiator. A single virtual template can be configured and cloned. How to disable a particular IPSec tunnel on Cisco router, Customers Also Viewed These Support Documents. But not working Why does the Deny Statement in the ACL specify the NAT Traffic? Behind-the-firewall configuration allows users to enter the network, while the network firewall is protected from unauthorized access. IPsec VTIs simplify the configuration of IPsec for protection of remote links, support multicast, and simplify network management and load balancing. Perform this task to configure a static IPsec VTI. Router(config-if)# ip address 10.1.1.1 255.255.255.0, Router(config-if)# tunnel mode ipsec ipv4, Router(config-if)# tunnel source loopback0. 192.168.5./255.255.255. Cisco IOS XE Release 3.2S -- DVTI supports multiple IPsec SAs. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. You conceptually replace a network with a tunnel when you use Cisco IOS IPsec or a VPN. SVTIs support only the IP any any proxy. The IPsec virtual tunnel also allows you to encrypt multicast traffic with IPsec. You can route to the interface or apply services such as QoS, firewalls, network address translation, and Netflow statistics as you would to any other interface. 07:53 PM All rights reserved. For example, on the East router you should change your crypto map from Loopback0 to G2/0. New here? To configure the IPSec VPN tunnels in the ZIA Admin Portal: Add the VPN Credential You need the FQDN and PSK when linking the VPN credentials to a location and creating the IKE gateways. Specify network ranges on both devices for passing traffic across the proposed tunnel. In order for a remote access VPN to work, such as a remote access full tunnel, the remote worker must install VPN client software on their device. Additionally, multiple Cisco IOS XE software features can be configured directly on the tunnel interface and on the physical egress interface of the tunnel interface. The proper peer and local endpoint for the tunnel should be identified. Learn more about how Cisco is using Inclusive Language. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. Also note use of the mode command. The basic SVTI configuration has been modified to include the virtual firewall definition. If the connect mode is set to manual, then the IPsec tunnel has to be initiated manually by a user. You replace the Internet cloud by a Cisco IOS IPsec tunnel that goes from 200.1.1.1 to 100.1.1.1 in this diagram. This method tends to be slow and has limited scalability. IPsec ESP is used when IP packets need to be exchanged between two systems while being protected against eavesdropping or modification along the way. 3. This document describes how to configure a policy-based VPN (site-to-site) over Internet Key Exchange (IKEv1) between two Cisco routers (Cisco IOS or Cisco IOS XE), which allows users to access resources across the sites over an IPsec VPN tunnel. Note:It is also possible to build the tunnel and still use NAT. Well configure the IPsec tunnel between these two routers so that traffic from 1.1.1.1/32 to 3.3.3.3/32 is encrypted. End with CNTL/Z. Creating Local Server From Public Address Professional Gaming Can Build Career CSS Properties You Should Know The Psychology Price How Design for Printing Key Expect Future. There is no way to "disable" the tunnel without modifying the config. For this demonstration I will be using the following 3 routers: R1 and R3 each have a loopback interface behind them with a subnet. set initiates tunnel:. There is also a static NAT for an inside server on the 10.1.1.x network in this sample configuration. You must specify parameters, such as internal IP addresses, internal subnet masks, DHCP server addresses, and Network Address Translation (NAT). IPsec VTIs simplify configuration of IPsec for protection of remote links, support multicast, and simplify network management and load balancing. 2022 Cisco and/or its affiliates. However, the static NAT command takes precedence over the generic NAT statement for all connections to and from 10.1.1.3. The figure below illustrates the IPsec VTI configuration. Specifies which transform sets can be used with the crypto map entry. When an IPsec VTI is configured, encryption occurs in the tunnel. The two sites have static public IP address as shown in the diagram. IP security (IPsec) virtual tunnel interfaces (VTIs) provide a routable interface type for terminating IPsec tunnels and an easy way to define protection between sites to form an overlay network. Furthermore, if traffic has been passed across the tunnel, the counters for both. Lets start with the configuration on R1! You must issue these additional commands to allow encrypted access to 10.1.1.3, the statically NAT'd host: These statements tell the router to only apply the static NAT to traffic that matches ACL 150. DMVPN and GET VPN ; GRE over IPSEC has been working in Cisco Packet Tracer since at least version 6.0.1 . For assistance with the configuration settings, resolving an IPsec tunnel between a Cisco router and Checkpoint Firewall as well as specific debug setting information, refer to, Configuring an IPSec Tunnel Between a Cisco Router and a Checkpoint NG. A remote access VPN can also include clientless. This module describes the configuration of Tunnel-IPSec interfaces on the Cisco CRS Router . Specify network ranges on both devices for passing traffic across the proposed tunnel. Configuration Tasks The use of the word partner does not imply a partnership relationship between Cisco and any other company. Traffic is encrypted or decrypted when it is forwarded from or to the tunnel interface and is managed by the IP routing table. Rene Not working for me. For DVTIs, you must apply VRF to the virtual template using the ip vrf forwarding command. This sample configuration shows you how to: Encrypt traffic between two private networks (10.1.1.x and 172.16.1.x). The Internet protocol suite provides end-to-end data communication specifying how data should be packetized, addressed, transmitted, routed, and received. The IP Security (IPsec) Encapsulating Security Payload (ESP), also encapsulates IP packets. Step 1Configuring the Tunnel Tunneling provides a way to encapsulate packets inside of a transport protocol. The Internet Key Exchange (IKE) security association (SA) is bound to the VTI. View with Adobe Reader on a variety of devices. You can monitor the interface, route to it, and it has an advantage over crypto maps because it is a real interface and provides the benefits of any other regular Cisco IOS XE interface. An account on Cisco.com is not required. 172.18.124.158local ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)current_peer: 172.18.124.157PERMIT, flags={origin_is_acl,}#pkts encaps: 20, #pkts encrypt: 20, #pkts digest 20#pkts decaps: 20, #pkts decrypt: 20, #pkts verify 20#pkts compressed: 20, #pkts decompressed: 20#pkts not compressed: 0, #pkts compr. Or any closest way to meet the above requirement? So, open the router's global configuration mode and run the following commands in global configuration mode. Configure Site to Site IPSec VPN Tunnel in Cisco IOS Router Diagram below shows our simple scenario. Use these resources to familiarize yourself with the community: Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. However, apply it to all other traffic sourced from 10.1.1.3 (Internet-based traffic). Are the crypto maps configured correctly? A major benefit associated with IPsec VTIs is that the configuration does not require a static mapping of IPsec sessions to a physical interface. The results should resemble this example:cisco_endpoint#show crypto isakmp sa dst src state pending created172.18.124.157 172.18.124.35 QM_IDLE 0 2. The IPsec VTI supports native IPsec tunneling and exhibits most of the properties of a physical interface. This is the end of Part 1 of this series, we have seen basic policy-based VPN setup and its sample configuration . I think the easiest way would be to get in the crypto map for that particular tunnel and remove either the peer or the ACL: or you can remove the isakmp key for that tunnel, that would do it to, e.g. This is NAT'd to 200.1.1.25 so that Internet users can access it. You can also setup Configure IPSec VPN With Dynamic IP in Cisco IOS Router. crypto ikev2 profile RTR1-RTR2-PROFILE match identity remote address 5.5.5.5 identity local address 1.1.1.1 IKEv2 uses asymetrical authentication methods, so you could use different methods. Any combination of QoS features offered in Cisco IOS XE software can be used to support voice, video, or data applications. For assistance with the configuration settings, resolving an IPsec tunnel between a Cisco router and Checkpoint Firewall as well as specific debug setting information, refer to Configuring an IPSec Tunnel Between a Cisco Router and a Checkpoint NG.Once the tunnel is configured, attempt to pass traffic from a workstation on one side of the connection to a workstation on the other side of the connection. The following commands were introduced or modified: crypto isakmp profile, interface virtual-template, show vtemplate, tunnel mode. Defines the ISAKAMP profile to be used for the virtual template. Features for encrypted packets are applied on the physical outside interface. Configure the IPsec parameters on both devices. Tunnel interfaces are virtual interfaces that provide encapsulation of arbitrary packets within another transport protocol. When the template is cloned to make the virtual-access interface, the service policy is applied there. The following example is policing traffic out the tunnel interface: Applying the virtual firewall to the SVTI tunnel allows traffic from the spoke to pass through the hub to reach the Internet. The virtual firewall uses Context-Based Access Control (CBAC) and NAT applied to the Internet interface as well as to the virtual template. 2022 Cisco and/or its affiliates. Because there is a routable interface at the tunnel endpoint, many common interface capabilities can be applied to the IPsec tunnel. We will establish an IPsec tunnel to a Cisco IOS-XE router configured to match VPN gateways settings in public clouds. Next, select Ok to reboot your router. Anyone knows a way to termporarily disable a particular IPSec tunnel on a Cisco router provided: - No change of configuration - Not affecting other running IPSec tunnels - GRE is not being used, so there is no tunnel interface to shut down Or any closest way to meet the above requirement? Router(config)# crypto isakamp profile red. Specifies the tunnel source as a loopback interface. This table lists only the software release that introduced support for a given feature in a given software release train. Configuration Tasks 3. crypto ipsec profile profile-name, 4. set transform-set transform-set-name [transform-set-name2transform-set-name6], 10. tunnel protection ipsec profile profile-name [shared], Router(config)# crypto ipsec profile PROF. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. When crypto maps are used, there is no simple way to apply encryption features to the IPsec tunnel. Check and modify the Palo Alto Networks firewall and Cisco router to have the same DPD configuration. IPsec VTIs simplify configuration of IPsec for protection of remote links, support multicast, and simplify network management and load balancing. Figure 6-1 Remote Access VPN Using IPSec Tunnel. In hardware crypto mode, all the IPsec VTIs are accelerated by the VAM2+ crypto engine, and all traffic going through the tunnel is encrypted and decrypted by the VAM2+. You usually do not want to use NAT for the traffic that goes from one private LAN to the remote private LAN for this reason. 06-22-2009 Configure vEdge. The tunnel on subnet 10 checks packets for IPsec policy and passes them to the Crypto Engine (CE) for IPsec encapsulation. DVTI uses reverse route injection to further simplify the routing configurations. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. Cisco IOS routers can be used to setup IPSec VPN tunnel between two sites. 4. set transform-set transform-set-name [transform-set-name2transform-set-name6], 5. interface virtual-template number, 7. tunnel protection ipsec profile profile-name [shared], 9. crypto isakamp profile profile-name, 10. virtua l- template template-number, Router(config)# interface virtual-template 2. crypto map rtptrans 10 ipsec-isakmp dynamic rtpmap ! Your router . Our peer is 192.168.23.3, the transform-set is called MYTRANSFORMSET and everything that matches access-list 100 should be encrypted by IPSEC: The access-list matches all traffic between 1.1.1.1 and 3.3.3.3: We need to make sure our router knows how to reach 192.168.23.3 and also tell it that it can reach 3.3.3.3 through 192.168.23.3: Last but not least, well activate the crypto map on the interface: Thats all we have to do on R1. The following table provides release information about the feature or features described in this module. The DVTI creates an interface for IPsec sessions and uses the virtual template infrastructure for dynamic instantiation and management of dynamic IPsec VTIs. The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Prerequisites Requirements There are no specific requirements for this document. The per-group or per-user definition can be created using Xauth User or Unity group, or it can be derived from a certificate. Features for clear-text packets are configured on the VTI. , then phase 1 (Internet Security Association and Key Management Protocol [ISAKMP]) has not been properly negotiated and should be examined. right click the table and select new ikev2 tunnel. This means that the original IP packet will be encapsulated in a new IP packet and encrypted before it is sent out of the network. Unless noted otherwise, subsequent releases of that software release train also support that feature. Third party trademarks mentioned are the property of their respective owners. 06:17 PM If your network is live, make sure that you understand the potential impact of any command. Refer to NAT Order of Operation for more information on how to configure a NAT. You want to see the packets which come from the Router 2 network with a source IP address from the 10.1.1.0/24 network instead of 200.1.1.1 when the packets reach the inside Router 3 network. To add VRF to the static VTI example, include the ip vrfand ip vrf forwarding commands to the configuration as shown in the following example: You can apply any QoS policy to the tunnel endpoint by including the service-policy statement under the tunnel interface. Traffic like data, voice, video, etc. Use this section to troubleshoot your configuration. The following examples show that a DVTI has been configured for an Easy VPN server: The following example shows how you can set up a router as the Easy VPN client. DVTIs provide efficiency in the use of IP addresses and provide secure connectivity. click the ipsec ikev2 tunnels tab. Dynamic VTIs allow dynamically downloadable per-group and per-user policies to be configured on a RADIUS server. There is currently no verification procedure available for this configuration. Are your ACLs for the VPN configured correctly? Network-extension mode is different from client mode in that the client specifies for the server its attached private subnet. Static VTIs (SVTIs) support only a single IPsec SA that is attached to the VTI interface. Anyone knows a way to termporarily disable a particular IPSec tunnel on a Cisco router provided: - Not affecting other running IPSec tunnels, - GRE is not being used, so there is no tunnel interface to shut down. To configure Generic Routing Encapsulation (GRE) over an IPSec tunnel between two routers, perform these steps: Create a tunnel interface (the IP address of tunnel interface on both routers must be in the same subnet), and configure a tunnel source and tunnel destination under tunnel interface configuration, as shown: interface Tunnel0. Identifies the IP address of the tunnel destination. This show command only tells you that no packets are encrypted or decrypted. Download the Nighthawk app at nighthawk-app. A host-to-network configuration is analogous to connecting a computer to a local area network. The use of IPsec VTIs both greatly simplifies the configuration process when you need to provide protection for remote access and provides a simpler alternative to using a generic routing encapsulation (GRE) tunnel for encapsulation and crypto maps with IPsec. Login to your vEdge to create & configure the IPSec interface. Traffic is encrypted when it is forwarded to the tunnel interface. Specifies the virtual template attached to the ISAKAMP profile. click lock. The Output Interpreter Tool (registered customers only) (OIT) supports certain show commands. The IPsec session is closed when both IKE and IPsec SAs to the peer are deleted. We use DH group 2: For each peer, we need to configure the pre-shared key. File Name: ipsec - vpn .pkt File Size: 11 KB Configuration . - edited Specify network ranges on both devices for passing traffic across the proposed tunnel. Specifies the interface on which the tunnel is configured and enters interface configuration mode. **. First, we will configure the phase 1 policy for ISAKMP where we configure the encryption (AES) and use a pre-shared key for authentication. The example in this chapter illustrates the configuration of a remote access VPN that uses the Cisco Easy VPN and an IPSec tunnel to configure and secure the connection between the remote client and the corporate network. The Tunnel-IPSec interface provides secure communications over otherwise unprotected public routes. You must specify parameters, such as internal IP addresses, internal subnet masks, DHCP server addresses, and Network Address Translation (NAT). 02-21-2020 2. The shared keyword is not required and must not be configured when using the tunnel mode ipsec ipv4 command for IPsec IPv4 mode. This is because you need to deny the encrypted traffic from being NAT'd with ACL 122. VPN configuration information must be configured on both endpoints; for example, on your Cisco router and at the remote user, or on your Cisco router and on another router. This functionality is organized into four abstraction layers, which classify all related protocols according to each protocol's scope of networking. Tunnel mode and transport mode. 3. Refer to Cisco Technical Tips Conventions for more information on document conventions. Use the OIT to view an analysis of show command output. For the latest feature information and caveats, see the release notes for your platform and software release. There is also a static NAT for an inside server on the 10.1.1.x network in this sample configuration. As shown in the image above, R1 initiates the negotiation and sends all its configured transform (in our example, there is only one) sets to R2. The traffic selector for the IPsec SA is always IP any any.. Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. The static NAT statement does not specifically deny encrypted traffic from also being NAT'd. There are no specific requirements for this document. If you are using certificates on both devices, then you would specify local and remote method to be RSA-SIG. The figure below illustrates the DVTI authentication path. 06:28 PM. interface Serial0 ip address 99.99.99.1 255.255.255. no ip directed-broadcast ip nat outside crypto map rtptrans ! 192.168.2./24. ip route 3.3.3.3 255.255.255.255 192.168.13.3, 38 more replies! IP security (IPsec) virtual tunnel interfaces (VTIs) provide a routable interface type for terminating IPsec tunnels and an easy way to define protection between sites to form an overlay network. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. You can choose tunnel interface between 0-2147483647 depends on your router capacity. The dynamic VTI simplifies VRF-aware IPsec deployment. Dont you need the tunnel ip address, so you can use that as next hop. The following example illustrates the use of the DVTI Easy VPN server, which serves as an IPsec remote access aggregator. This sample configuration uses the route-map option on the NAT command to stop it from being NAT'd if traffic for it is also destined over the encrypted tunnel. Packet Flow out of the IPsec Tunnel, transform-set-name2transform-set-name6, Figure 7. If the show crypto isakmp sa command output shows anything other than QM_IDLE in the state, then phase 1 (Internet Security Association and Key Management Protocol [ISAKMP]) has not been properly negotiated and should be examined. Now well create a similar configuration on R3: If you like to keep on reading, Become a Member Now! Refer to Configuring an IPsec Tunnel between Routers with Duplicate LAN Subnets for more information on how to build a tunnel while NAT is active. Issue this command: This static NAT precludes users on the 172.16.1.x network from reaching 10.1.1.3 via the encrypted tunnel. Traffic is encrypted only if it is forwarded out of the VTI, and traffic arriving on the VTI is decrypted and routed accordingly. New here? Traffic forwarding is handled by the IP routing table, and dynamic or static routing can be used to route traffic to the SVTI. For example, AWS provides sample configuration files for different platforms (see this URL). - edited DVTIs function like any other real interface so that you can apply QoS, firewall, other security services as soon as the tunnel is active. In this display, Tunnel 0 is up, and the line protocol is up. If the line protocol is down, the session is not active. The tunnel source interface (ge0/0 in the example below) needs to be the WAN facing interface which is configured with the public IP (i.e. 2. Dynamic IPsec VTI in a Site-to-Site Scenario, Figure 4. You must deny encrypted traffic from being NAT'd (even statically one-to-one NAT'd) with a route-map command on the static NAT statement. Configure the IPsec parameters on both devices. 05:32 PM. Resolution Complete these steps to set up the IPsec VPN tunnel: 1. R1(config)#ex. During IP routing, the Cisco CG-OS router identifies any traffic destined for the virtual tunnel. Configure the Internet Key Exchange (IKE) proposal on both devices. The issue may be due to a Dead Peer Detection (DPD) configuration mismatch. SVTI configurations can be used for site-to-site connectivity in which a tunnel provides always-on access between two sites. enter a tunnel name. DVTI supports multiple IPsec SAs. IPsec VTIs provide a routable interface type for terminating IPsec tunnels and an easy way to define protection between sites to form an overlay network. Assign a static IP address (external address 200.1.1.25) to a network device at 10.1.1.3. The following example shows the basic DVTI configuration with QoS added: Configuring Security for VPNs with IPsec module in the Cisco IOS XE Security Configuration Guide: Secure Connectivity, Cisco IOS XE Quality of Service Solutions Configuration Guide, Security commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples, Easy VPN Server module in the Cisco IOS XE Security Configuration Guide: Secure Connectivity, Cisco IOS Master Commands List, All Releases. The figure below illustrates how a SVTI is used. When the device is ON and Wi-Fi hotspot is active, the admin screen. From the Device Model drop-down, select the type of device for which you are creating the template. When IPsec VTIs are used, you can separate the application of features such as NAT, ACLs, and QoS and apply them to clear-text or encrypted text, or both. Note:The route-map option on a static NAT is only supported from Cisco IOS Software Release 12.2(4)T and later. Components Used http://www.cisco.com/cisco/web/support/index.html. In this post, I will show steps to Configure Site to Site IPSec VPN Tunnel in Cisco IOS Router . Retrieve the public IPv4 address of the virtual network gateway in Azure. This article will show how to setup and configure two Cisco routers to create a permanent secure site-to-site VPN tunnel over the Internet, using the IP Security (IPSec) protocol. In fact, the configuration of the Easy VPN server works for the software client or the Cisco IOS XE client. Cisco SD-WAN IPSec Tunnels Example. The DVTI technology replaces dynamic crypto maps and the dynamic hub-and-spoke method for establishing tunnels. Without Virtual Private Network (VPN) Acceleration Module2+ (VAM2+) accelerating virtual interfaces, the packet traversing an IPsec virtual interface is directed to the router processor (RP) for encapsulation. failed: 0, #pkts decompress failed: 0#send errors 0, #recv errors 0. Configuring the IPSec Tunnel on Cisco Router 2 Now, we already described all the parameters used in the IPSec tunnel. This means that the original IP packet will be encapsulated in a new IP packet and encrypted before it is sent out of the network. VPN traffic is forwarded to the IPsec VTI for encryption and then sent out the physical interface. Here, I access the CLI of the Cisco ASA Firewall and initiate some traffic towards the Cisco Router LAN Subnet, i.e. 2. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. Use these resources to familiarize yourself with the community: Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. This example uses basically the same idea as the Easy VPN client that you can run from a PC to connect. Network Security, VPN Security, Unified Communications, Hyper-V, Virtualization, Windows 2012, Routing, Switching, Network Management, Cisco Lab, Linux Administration 1. Using IP routing to forward the traffic to encryption simplifies the IPsec VPN configuration because the use of ACLs with a crypto map in native IPsec configurations is not required. The following examples illustrate different ways to display the status of the DVTI: The following example shows how to configure VRF-Aware IPsec to take advantage of the DVTI: The following example shows how to configure VRF-Aware IPsec to take advantage of the DVTI when VRF is configured under an ISAKMP profile: The following example shows how to configure VRF-Aware IPsec to take advantage of the DVTI when VRF is configured under both a virtual-template and an ISAKMP profile: The DVTI Easy VPN server can be configured behind a virtual firewall. Configure the Internet Key Exchange (IKE) proposal on both devices. The show crypto ipsec sa command identifies information about phase 2 of the connection (IPsec). Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. The information in this document is based on these software and hardware versions: The information in this document was created from the devices in a specific lab environment. The per-group or per-user definition can be created using extended authentication (Xauth) User or Unity group, or it can be derived from a certificate. Configure the Internet Key Exchange (IKE) proposal on both devices. A single DVTI can support several static VTIs. Packet Flow into the IPsec Tunnel, Figure 5. The DVTI simplifies Virtual Private Network (VPN) routing and forwarding (VRF)-aware IPsec deployment. The virtual template infrastructure is extended to create dynamic virtual-access tunnel interfaces. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. This tunnel design allows OSPF dynamic routing over the tunnel Basic IPSEC VPN configuration Download network topology. 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