ipsec vpn tunnel configuration cisco routerrescue yellow jacket trap not working

As earlier discussed, we must have static routable IP addresses to establish an IPSec tunnel. The default is Secure Hash standard (SHA-1). username name {nopassword | password password | password encryption-type encrypted-password}. This example specifies serial interface 1/0 on the headquarters router. IPSec can be configured in tunnel mode or transport mode. Note The material in this chapter does not apply to Cisco 850 series routers . Also enters Internet Security Association and Key Management Protocol (ISAKMP) policy configuration mode. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). As a result, the fair queue may occasionally contain more messages than its configured threshold number specifies. To specify the interval length at which keepalive packets are to be sent, use the cry isakmp keepalive command, as exemplified in Step 2 of the "Creating IKE Policies" section. Specifies the Diffie-Hellman group to be used in an IKE policy. 3/ Perform initial router configuration. Digital certificates simplify authentication. You need only enroll each peer with the CA, rather than manually configuring each peer to exchange keys. 1 When neither match-all nor match-any is specified, the default is match-all. ipsec-isakmp dynamic dynmap, crypto ipsec client The example uses 168-bit Data Encryption Standard (DES). Note Although the site-to-site VPN scenario in this chapter is configured with GRE tunneling, a site-to-site VPN can also be configured with IPSec only tunneling. crypto map tag client configuration address [initiate | respond]. Fast Ethernet interface 0/0 of the remote office router is connected to a PC client. Two types of VPNs are supportedsite-to-site and remote access. License to Use IPSec VPN Tunnel on Cisco Router Go to solution. After the IPSec server has been configured, a VPN connection can be created with minimal configuration on an IPSec client, such as a supported Cisco870 series access router. Specifies the hash algorithm used in the IKE policy. In order to configure a preshared authentication key, enter the crypto isakmp key command in global configuration mode: Use the extended or named access list in order to specify the traffic that should be protected by encryption. Packets that arrive at the output interface are classified according to the match criteria filters you define, then each one is assigned the appropriate weight. See the software configuration documentation as needed to configure VPN for other router models. Specifies the primary Domain Name System (DNS) server for the group. Comprehensive configuration examples for both the headquarters and business partner routers are provided in the "Comprehensive Configuration Examples" section. Using redundant GRE tunnels protected by IPSec from a remote router to redundant headquarter routers, routing protocols can be employed to delineate the "primary" and "secondary" headquarter routers. Note: The configuration that is described in this section is optional. 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. 2022 Cisco and/or its affiliates. The expected output is to see the ACTIVE state: In order to verify whether IKEv1 Phase 2 is up on the ASA, enter theshow crypto ipsec sa command. You can configure class policies for as many classes as are defined on the router up to the maximum of 64. Note that a given pre-shared key is shared between two peers. It is the crypto map entry referencing the specific access list that defines whether IPSec processing is applied to the traffic matching a permit in the access list. When IKE is used to establish SAs, the IPSec peers can negotiate the settings they will use for the new SAs. R1 (config)#crypto map MY-CRYPTO-MAP 10 ipsec-isakmp dynamic IPSEC-SITE-TO-SITE-VPN. Network-Based Application Recognition (NBAR) adds intelligent network classification to network infrastructures. GNS3Network.com is not associated with any profit or non profit organization. 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. This section also contains basic steps to configure Network-Based Application Recognition (NBAR), which is a classification engine that recognizes a wide variety of applications, including web-based and other protocols that utilize dynamic TCP/UDP port assignments. Cisco recommends using 3DES. I assumed that you have reachability to the Remote Network. In IPSec tunnel mode, the entire original IP datagram is encrypted, and it becomes the payload in a new IP packet. This example configures access list 111, which was created in the "Creating Crypto Access Lists" section. When the router receives the packet with the inside global IP address, it performs a NAT table lookup by using the inside global address as a key. Specify the encryption algorithm56-bit Data Encryption Standard (DES [des]) or 168-bit Triple DES (3des). Specify which transform sets are allowed for this crypto map entry. Tip: Refer to the Most Common L2L and Remote Access IPSec VPN Troubleshooting Solutions Cisco document for more information about how to troubleshoot a site-to-site VPN. The following sample configuration is based on the physical elements shown in Figure3-8: Figure3-8 Site-to-Site VPN Scenario Physical Elements. The certificates are used by each peer to securely exchange public keys. The default is Secure Hash standard (SHA-1). In order to define an IPSec transform set (an acceptable combination of security protocols and algorithms), enter the crypto ipsec transform-set command in global configuration mode. This section contains basic steps to configure IPSec and includes the following tasks: Defining Transform Sets and Configuring IPSec Tunnel Mode, Verifying Transform Sets and IPSec Tunnel Mode. To define a transform set and configure IPSec tunnel mode, complete the following steps starting in global configuration mode: Define a transform set and enter crypto-transform configuration mode. Specify the inside interface. Specifies global lifetime values used when IPSec security associations are negotiated. Any VPN connection requires both endpoints be configured properly to function. Also enters Internet Security Association Key Management Protocol (ISAKMP) policy configuration mode. This example configures the shared key test12345 to be used with the remote peer 172.24.2.5 (serial interface 1/0 on the remote office router). QoS policies that can be applied to traffic classification are listed in the table below. In this scenario, you only need to complete this task at the business partner router. Testing the Configuration of IPSec Tunnel. Outside local addressThe IP address of an outside host as it appears to the inside network. This is the only configuration statement required in dynamic crypto map entries. configuration group rtr-remote, | reverse-access | configuration} {default |, crypto ipsec To configure a different pre-shared key for use between the headquarters router and the business partner router, complete the following steps in global configuration mode: At the local peer: Specify the shared key the headquarters router will use with the business partner router. For each peer, we need to configure the pre-shared key. Here is an example: Note:An ACL for VPN traffic uses the source and destination IP addresses after NAT. crypto map map-name seq-num [ipsec-isakmp] [dynamic dynamic-map-name] [discover] [profile profile-name]. 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. If you do not specify a value for a parameter, the default value is assigned. Specifies the default class in order to configure its policy. The example specifies 168-bit data encryption standard (DES). In order to configure the ISAKMP policies for the IKEv1 connections, enter the crypto isakmp policy command in global configuration mode. If your network is live, make sure that you understand the potential impact of any command. To configure fair queuing on an interface, complete the following steps starting in global configuration mode: Specify an interface and enter interface configuration mode. Note:If you do not specify a value for a given policy parameter, the default value is applied. Step2 Specify the shared keys at each peer. Certification authority (CA) interoperability is provided by the ISM in support of the IPSec standard. So, the summary of the requirements are: First, we will configure all the configurations on Router1. configuration address respond, aaa authentication login Note Using the clear crypto sa command without parameters clears out the full SA database, which clears out active security sessions. Specifies AAA authorization of all network-related service requests, including PPP, and specifies the method of authorization. Remote access VPNs are used by remote clients to log in to a corporate network. Perform these steps to configure the group policy, beginning in global configuration mode: crypto isakmp client configuration group {group-name | default}. Typically, there should be no NAT performed on the VPN traffic. Here, you can get Network and Network Security related Articles and Labs. All rights reserved. For details about this command and additional parameters that can be set, see the Cisco IOS Dial Technologies Command Reference. We recommend that you configure "mirror image" crypto access lists for use by IPSec and that you avoid using the any keyword. Defines a transform setan acceptable combination of IPSec security protocols and algorithms. Use the class-map configuration command to define a traffic class and the match criteria that will be used to identify traffic as belonging to that class. Now, we need to apply this crypto Map to the Outgoing Interface. Defines a transform setAn acceptable combination of IPSec security protocols and algorithms. Depending on which authentication method you specify in your IKE policies, you need to complete an additional companion configuration before IKE and IPSec can successfully use the IKE policies. Then use the following policy-map configuration commands to configure policy for a standard class and the default class. An IKEv1 transform set is a combination of security protocols and algorithms that define the way that the ASA protects data. The following tasks are required to configure NBAR: Note You must enable Cisco Express Forwarding (CEF) before you configure NBAR. Use the no match-all and nomatch-any commands to disable these commands within the class map. This example specifies transform set proposal4, which was configured in the "Defining Transform Sets and Configuring IPSec Tunnel Mode" section. 2014-07-18 Cisco Systems, IPsec/VPN, Palo Alto Networks Cisco Router, IPsec, Palo Alto Networks, Site-to-Site VPN Johannes Weber. crypto map map-name seq-num [ipsec-isakmp] [dynamic dynamic-map-name] [discover] [profile profile-name]. You must also configure the peers to obtain certificates from the CA. Note NAT is used if you have conflicting private address spaces in the extranet scenario. Figure3-5 illustrates IP tunneling terminology and concepts. You can configure IPsec on tunnels in the transport VPN (VPN 0) and in service VPNs (VPN 1 through 65530, except for 512). 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. Log into the router's setup pages. An IKE policy defines a combination of security parameters to be used during the IKE negotiation. Tip If you have trouble, make sure you are using the correct IP addresses. After you have configured a different shared key, configure IPSec at each participating IPSec peer. Creates source proxy information for the crypto map entry. You could configure multiple inside and outside interfaces. I have a challenge doing configs using IPsec profiles. NBAR ensures that network bandwidth is used efficiently by working with QoS features. 5. "PFS N" indicates that IPSec will not negotiate perfect forward secrecy when establishing new SAs for this crypto map. All packets forwarded to the GRE tunnel are encrypted if no further access control lists (ACLs) are applied to the tunnel interface. During IKE negotiations, the peers search in multiple transform sets for a transform that is the same at both peers. Enter the show interfaces serial 1/0 fair-queue EXEC command to see information on the interface that is configured for WFQ. With the default configurations, the router provides secure connectivity by encrypting the traffic sent between remote sites. Inside local addressThe IP address that is assigned to a host on the inside network. This example implements a username of cisco with an encrypted password of cisco. Specifies the name of the policy map to be attached to the input direction of the interface. Perform these steps to configure the IPSec crypto method, beginning in global configuration mode: crypto dynamic-map dynamic-map-name dynamic-seq-num. Refer to the "IP Security and Encryption" part of the Cisco IOS Security Configuration Guideand the Security Command Reference publications for detailed configuration information on IPSec, IKE, and CA. Configure access list 102 to deny all UDP traffic. You must define transform sets regardless of the tunneling protocol you use. Use the match not command to configure a match that evaluates to true if the packet does not match the specified protocol. Ensure that an IKE exchange using RSA signatures has already occurred between the peers. Now, we need to configure the IPSec VPN Phase 2 Parameters. Along with the IP addresses, we also have to configure ISAKMP Phase 1 and ISAKMP Phase 2 ( IPSec). configuration group rtr-remote, ip local pool dynpool If you have not performed these configurations tasks, see Chapter1 "Basic Router Configuration," Chapter3 "Configuring PPP over Ethernet with NAT," Chapter4 "Configuring PPP over ATM with NAT," and Chapter5 "Configuring a LAN with DHCP and VLANs," as appropriate for your router. Traffic like data, voice, video, etc. Notice that in the access-list that is used in the route-map, the VPN traffic of interest should be denied. See "Related Documentation" section on pagexi for information on how to access these publications. Complexity arises when you need to add extra Cisco 7200 series routers to the network. This configuration example does not configure the CA. This document describes how to configure a site-to-site (LAN-to-LAN) IPSec Internet Key Exchange Version 1 (IKEv1) tunnel via the CLI between a Cisco Adaptive Security Appliance (ASA) and a router that runs Cisco IOS software. tunnel destination default-gateway-ip-address. To define a transform set and configure IPSec . This example uses a local authorization database. We have done the configuration on both the Cisco Routers. encryption {des | 3des | aes | aes 192 | aes 256}. Note This example only configures the head-end Cisco 7200 series router. If no default class is configured, then by default the traffic that does not match any of the configured classes is flow classified and given best-effort treatment. (Optional) If you want the security associations for this crypto map to be negotiated using shorter IPSec security association lifetimes than the globally specified lifetimes, specify a key lifetime for the crypto map entry. Specifies the IKE pre-shared key for the group policy. The extranet scenario introduced in Figure3-3 builds on the site-to-site scenario by providing a business partner access to the same headquarters network. Cisco recommends that you have knowledge of these topics: 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. If you have no conflicting private address spaces, proceed to the "Step 3Configuring Encryption and IPSec" section. This example specifies Fast Ethernet interface0/1 on the headquarters router. 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. CiscoIOS quality of service (QoS) refers to the ability of a network to provide better service to selected network traffic over various underlying technologies including Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet and 802.1 networks, SONET, and IP-routed networks. To configure your Cisco 7200 series router to use digital certificates as the authentication method, use the following steps, beginning in global configuration mode. To create a class map containing match criteria against which a packet is checked to determine if it belongs to a class, and to effectively create the class whose policy can be specified in one or more policy maps, use the first command in global configuration mode to specify the class-map name. If the access list is configured, the data flow identity proposed by the IPSec peer must fall within a permit statement for this crypto access list. The same configuration is done on the Cisco Router R2. In this article, we will discuss, how you can configure IPSec Tunnel between Cisco Routers at different locations. ip local pool {default | poolname} [low-ip-address [high-ip-address]]. This example configures the DES algorithm, which is the default. Configure access list 102 inbound on serial interface 1/0 on the headquarters router. This configuration example is a basic VPN setup between a FortiGate unit and a Cisco router, using a Virtual Tunnel Interface (VTI) on the Cisco router. In order for the crypto map entry to be complete, there are some aspects that must be defined at a minimum: The final step is to apply the previously defined crypto map set to an interface. Note With manually established security associations, there is no negotiation with the peer, and both sides must specify the same transform set. Fast Ethernet interface 0/0 of the business partner router is connected to a PC client. Now, we will configure the Phase 1 Parameters on Router1. Exits IKE policy configuration mode, and enters global configuration mode. Comprehensive configuration examples for both the headquarters and remote office routers are provided in the "Comprehensive Configuration Examples" section. As in the site-to-site business scenario, the Internet provides the core interconnecting fabric between the headquarters and business partner routers. Perform these steps to configure the Internet Key Exchange (IKE) policy, beginning in global configuration mode: Creates an IKE policy that is used during IKE negotiation. Displays the configuration and statistics for the class name configured in the policy. This example configures traffic from the remote office Fast Ethernet network (10.1.4.0 255.255.255.0) through GRE tunnel0. To be the most effective in managing remote devices, you must use static cryptographic maps at the site where your management applications are located. Packets with the same source IP address, destination IP address, source Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port, or destination TCP or UDP port belong to the same flow. With GRE, a virtual tunnel is created between the two endpoints (Cisco routers) and packets . GRE encapsulates the clear text packet, then IPSec (in transport or tunnel mode) encrypts the packet.This packet flow of IPSec over GRE enables routing updates, which are generally multicast, to be passed over an encrypted link. You can also use the crypto ipsec transform-set? R3 acts as a pass-through and has no knowledge of the VPN. This example configures sequence number2 and IKE for crypto map s4second. Figure7-1 Site-to-Site VPN Using an IPSec Tunnel and GRE, Branch office containing multiple LANs and VLANs, Fast Ethernet LAN interfaceWith address 192.168.0.0/16 (also the inside interface for NAT), VPN clientCisco 850 or Cisco 870 series access router, Fast Ethernet or ATM interfaceWith address 200.1.1.1 (also the outside interface for NAT), LAN interfaceConnects to the Internet; with outside interface address of 210.110.101.1, VPN clientAnother router, which controls access to the corporate network, LAN interfaceConnects to the corporate network, with inside interface address of 10.1.1.1. Only the relevant configuration has . Flow-based WFQ is also called fair queuing because all flows are equally weighted. If the access list permits the address, the software transmits the packet. authentication {rsa-sig | rsa-encr | pre-share}. The crypto maps must be applied to each interface through which IPSec traffic flows. If the NAT overload is used, then a route-map should be used in order to exempt the VPN traffic of interest from translation. The following configuration example shows a portion of the configuration file for the VPN and IPSec tunnel described in this chapter. Enter the show ip nat translations verbose EXEC command to see the global and local address translations and to confirm static translation is configured. R1#ping 192.168.2.1 source 192.168.1.1. Upon loss of connectivity to the primary router, routing protocols will discover the failure and route to the secondary Cisco 7200 series router, thereby providing network redundancy. You can use Cisco IOS firewall features to configure your Cisco IOS router as: An Internet firewall or part of an Internet firewall, A firewall between groups in your internal network, A firewall providing secure connections to or from branch offices, A firewall between your company network and your company partners networks. IPSec tunnel mode can be used as an alternative to a GRE tunnel, or in conjunction with a GRE tunnel. At the remote peer: Specify the shared key to be used with the local peer. The following tasks are required to configure CBWFQ: Configuring Class Policy in the Policy Map (Tail Drop), Attaching the Service Policy and Enabling CBWFQ. For inbound access lists, after receiving a packet, the Cisco IOS software checks the source address of the packet against the access list. Configuration. Because edge routers and backbone routers in a network do not necessarily perform the same operations, the QoS tasks they perform might differ as well. Configure the interface IP addresses on the routers and a default route on R_01 and R_03 pointing to the R_02 router. In order to configure the IKEv1 preshared key, enter the tunnel-group ipsec-attributes configuration mode: The ASA uses Access Control Lists (ACLs) in order to differentiate the traffic that should be protected with IPSec encryption from the traffic that does not require protection. See the Cisco IOS Security Command Reference for more detail about this command. Enter the show interfaces tunnel0 EXEC command to view the tunnel interface status, configured IP addresses, and encapsulation type. Note AH and ESP can be used independently or together, although for most applications just one of them is sufficient. This example configures access list 111 to encrypt all IP traffic between the headquarters server (translated inside global IP address 10.2.2.2) and PCB (IP address 10.1.5.3) in the business partner office. Establishes a username-based authentication system. Note The default policy and the default values for configured policies do not show up in the configuration when you issue a showrunning-config EXEC command. 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. Specifies a QoS-group value to associate with the packet. to up, etwork Protocols Configuration Guide, Part1, Integrated Service Adapter and Integrated Service Module Installation and Configuration, "Dynamic versus Static Crypto Maps" section on page2-5, transform-set-name2transform-set-name6, set Ensure you can ping the IP addresses that you configured on the tunnel interface. Traffic forwarded through the GRE tunnel is encapsulated and routed out onto the physical interface of the router. Note Throughout this chapter, there are numerous configuration examples and sample configuration outputs that include unusable IP addresses. security-association lifetime seconds, set security-association lifetime kilobytes, Quality of Service Solutions Configuration Guide, Quality of Service Solutions Command Reference, Cisco IOS Switching Services Configuration Guide, Cisco IOS Release 12.0 Quality of Service Solutions Configuration Guide, Site-to-Site and Extranet VPN Business Scenarios, Configuring the Tunnel Interface, Source, and Destination, Verifying the Tunnel Interface, Source, and Destination, Step2Configuring Network Address Translation, Configuring Static Inside Source Address Translation, Verifying Static Inside Source Address Translation, Additional Configuration Required for IKE Policies, Configuring the Cisco7200 Series Router for Digital Certificate Interoperability, Defining Transform Sets and Configuring IPSec Tunnel Mode, Verifying Transform Sets and IPSec Tunnel Mode, Verifying Crypto Map Interface Associations, Configuring Network-Based Application Recognition, Configuring Class-Based Weighted Fair Queuing, Configuring Class Policy in the Policy Map (Tail Drop), Attaching the Service Policy and Enabling CBWFQ, Verifying Class-Based Weighted Fair Queuing, Step 5Configuring Cisco IOS Firewall Features, Creating Extended Access Lists Using Access List Numbers, Verifying Extended Access Lists Are Applied Correctly, "Comprehensive Configuration Examples" section, "Step2Configuring Network Address Translation" section, "Configuring IPSec and IPSec Tunnel Mode" section, "Defining Transform Sets and Configuring IPSec Tunnel Mode" section, "Step 3Configuring Encryption and IPSec" section. Fast Ethernet interface 0/0 of the headquarters router is connected to a corporate server and Fast Ethernet interface 0/1 is connected to a web server. You must specify parameters, such as internal IP addresses, internal subnet masks, DHCP server addresses, and Network Address Translation (NAT). It authenticates our data using Hash), Authentication: In this example, we are using the pre-shared key as authentication), Lifetime: 86400 ( Default lifetime for the Phase1), IPSec Protocol: ESP (Encapsulation Security Payload).

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