Easyvpn

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For the port on which cTCP is enabled, those applications will not work. Universal Client Mode Using DHCP The Easy VPN Remote feature does not support universal client mode using DHCP. Local-Traffic Triggered Activation This feature helps to set up the Easy VPN connection with locally generated interesting traffic. Preconditions Easy VPN should be configured in Connect ACL mode. The local traffic feature will be enabled only when at least one inactive EasyVPN tunnel is in connect ACL mode. The local traffic feature will be automatically disabled for the following conditions: all the Easy VPN tunnels in Connect ACL mode are active, and when none of the VPN client configuration are in Connect ACL mode. Cascaded ACLs Cascaded ACLs are used to add new networks in the Easy VPN interest list. None of the entries in ACL should match the inside interface network. If a match occurs, Easy VPN fails to create NAT rules and, hence, packets will not be translated by Easy VPN. Information About Cisco Easy VPN Remote Benefits of the Cisco Easy VPN Remote Feature Cisco Easy VPN Remote Overview Modes of Operation Authentication with Cisco Easy VPN Remote Tunnel Activation Options Dead Peer Detection Stateless Failover Support Cisco Easy VPN Remote Features Easy VPN Server on a VPN 3000 Series Concentrator Benefits of the Cisco Easy VPN Remote Feature Allows dynamic configuration of end-user policy, requiring less manual configuration by end users and field technicians, thus reducing errors and further service calls. Allows the provider to change equipment and network configurations as needed, with little or no reconfiguration of the end-user equipment. Provides for centralized security policy management. Enables large-scale deployments with rapid user provisioning. Eliminates the need for end users to purchase and configure external VPN devices. Eliminates the need for end users to install and configure Easy VPN Client software on their PCs. Offloads the creation and maintenance of the VPN connections from the PC to the router. Reduces interoperability problems between the different PC-based software VPN clients, external hardware-based VPN solutions, and other VPN applications. Sets up a single IPsec tunnel regardless of

Can download the configuration content and apply it to its running configuration. For more information about this feature, see the section "Configuration Management Enhancements" in the Easy VPN Server feature module. Reactivate Primary Peer The Reactivate Primary Peer feature allows a default primary peer to be defined. The default primary peer (a server) is one that is considered better than other peers for reasons such as lower cost, shorter distance, or more bandwidth. With this feature configured, if Easy VPN fails over during Phase 1 SA negotiations from the primary peer to the next peer in its backup list, and if the primary peer is again available, the connections with the backup peer are torn down and the connection is again made with the primary peer. Dead Peer Detection is one of the mechanisms that acts as a trigger for primary peer reactivation. Idle timers that are configured under Easy VPN is another triggering mechanism. When configured, the idle timer detects inactivity on the tunnel and tears it down. A subsequent connect (which is immediate in auto mode) is attempted with the primary preferred peer rather than with the peer last used. Note Only one primary peer can be defined. Identical Addressing Support The Identical Addressing Support feature supports identically addressed LANs on Easy VPN remotes. Network resources, such as printers and web servers on the LAN side of the EasyVPN remotes, that have overlapping addressing with other Easy VPN remotes are now reachable. The Easy VPN Remote feature was enhanced to work with NAT to provide this functionality. The Easy VPN server requires no changes to support the Identical Addressing Support feature. The Identical Addressing Support feature is supported only in network extension modes (network-extension and network-plus). Virtual tunnel interfaces must be configured on the Easy VPN remote before using the Identical Addressing Support feature. The daigram below shows an example of the Identical Addressing Support feature configuration. Figure 11 Identical Addressing Support The Identical Addressing Support feature can be configured with the following command and enhanced commands: crypto ipsec client ezvpn Enhanced commands nat acl {acl-name | acl-number}--Enables

Resolution. The peer command may be input multiple times. However, only one default or primary peer entry can exist at a time (for example, 10.2.2.2 default). The default keyword defines the peer as the primary peer. Step 5 idle-time idle-time Example: Router (config-crypto-ezvpn)# idle-time 60 (Optional) Idle time in seconds after which an Easy VPN tunnel is brought down. Idle time=60 through 86400 seconds. Note If idle time is configured, the tunnel for the primary server is not brought down. Configuring Identical Addressing Support Configuring Identical Addressing Support comprises the following tasks: Defining the Easy VPN remote in network-extension mode and enabling nat allow. Assigning the Cisco Easy VPN Remote configuration to the Outside interface. Creating a loopback interface and assigning the Cisco Easy VPN Remote configuration to the Inside interface of the loopback interface. Configuring a one-to-one static NAT translation for each host that needs to be accessible from the EasyVPN server-side network or from other client locations. Configuring dynamic overloaded NAT or PAT using an access list for all the desired VPN traffic. The NAT or PAT traffic is mapped to the Easy VPN inside interface IP address. And, if split-tunneling is required, using the nat aclcommand to enable split-tunneling for the traffic specified by the acl-name or the acl-number argument. The ACL is the same as the ACL used by the NAT or PAT mapping in the preceding bullet item. To configure Identical Addressing Support, perform the following steps on your router. Before You Begin Easy VPN Remote must be configured in network extension mode before you can configure the Identical Addressing Support feature. SUMMARY STEPS 1. enable 2. configure terminal 3. crypto ipsec client ezvpn name 4. mode network-extension 5. nat allow 6. exit 7. interface interface 8. crypto ipsec client ezvpn name outside 9. exit 10. interface interface 11. ip address ip mask 12. crypto ipsec client ezvpn name inside 13. exit 14. ip nat inside source static local-ip global-ip 15. ip nat inside source list {acl-name | acl-number} interface interface overload 16. crypto ipsec client ezvpn name 17. nat acl {acl-name | acl-number} 18.

VPN Remote feature using the debug crypto ipsec client ezvpncommand. Enable debugging of IKE events using the debug crypto ipsecand debug crypto isakmpcommands. Display the active IPsec VPN connections using the show crypto engine connections active command. To reset the VPN connection, use the clear crypto ipsec client ezvpn command. If you have debugging enabled, you might prefer to use the clear crypto sa and clear crypto isakmp commands. Troubleshooting the Client Mode of Operation The following information may be used to troubleshoot the Easy VPN Remote configuration for the client mode of operation. In client mode, the Cisco Easy VPN Remote feature automatically configures the NAT or PAT translation and access lists that are needed to implement the VPN tunnel. These configurations are automatically created when the IPsec VPN connection is initiated. When the tunnel is torn down, the NAT or PAT and access list configurations are automatically deleted. The NAT or PAT configuration is created with the following assumptions: The ip nat inside command is applied to all inside interfaces, including default inside interfaces. The default inside interface is the Ethernet 0 interface (for the Cisco 806, Cisco 826, Cisco 827, Cisco 828, Cisco 831, Cisco 836, and Cisco 837 routers). The ip nat outside command is applied to the interface that is configured with the Cisco Easy VPN Remote configuration. On the Cisco 800 series and Cisco 1700 series routers, the outside interface is configured with the Cisco Easy VPN Remote configuration. On the Cisco 1700 series routers, Cisco 2600 series routers, Cisco 3600 series routers, and Cisco 3700 series routers, multiple outside interfaces can be configured. Note Configuring the ip nat inside and ip nat outsidecommands on the EasyVPN outside and inside interfaces respectively leads to undefined behavior. This configuration is considered invalid. Tip The NAT or PAT translation and access list configurations that are created by the Cisco Easy VPN Remote feature are not written to either the startup configuration or running configuration files. These configurations, however, can be displayed using the show ip nat statistics and show access-list commands. Troubleshooting Remote Management To troubleshoot

Guide Cisco 827 and SOHO 77 Routers Hardware Installation Guide Cisco 828 and SOHO 78 Routers Hardware Installation Guide Cisco 837 ADSL Broadband Router Cisco uBR905 and Cisco uBR925 cable access routers Cisco uBR925 Cable Access Router Hardware Installation Guide Cisco uBR905 Hardware Installation Guide Cisco uBR905/uBR925 Cable Access Router Software Configuration Guide Cisco uBR905 Cable Access Router Subscriber Setup Quick Start Card Cisco uBR925 Cable Access Router Subscriber Setup Quick Start Card Cisco uBR925 Cable Access Router Quick Start User Guide Cisco 1700 series routers Cisco 1700 Series Router Software Configuration Guide Cisco 1710 Security Router Hardware Installation Guide Cisco 1710 Security Router Software Configuration Guide Cisco 1711 Security Access Router Cisco 1720 Series Router Hardware Installation Guide Cisco 1721 Access Router Hardware Installation Guide Cisco 1750 Series Router Hardware Installation Guide Cisco 1751 Router Hardware Installation Guide Cisco 1751 Router Software Configuration Guide Cisco 1760 Modular Access Router Hardware Installation Guide Also see the Cisco IOS release notes for Cisco IOS Release 12.2(4)YA: SOHO 70 and Cisco 800 Series--Release Notes for Release 12.2(4)YA Release Notes for Cisco uBR905 and Cisco uBR925 Cable Access Routers for Cisco IOS Release 12.2 YA Cisco 1700 Series--Release Notes for Release 12.2(4)YA Cisco 2600 series, Cisco 3600 series, and Cisco 3700 series routers Cisco 2600 Series Multiservice Platforms Cisco 2600 Series Routers Hardware Installation Guide Cisco 3600 Series Multiservice Platforms Cisco 3600 Series Hardware Installation Guide Cisco 3700 Series Multiservice Access Routers Cisco 3700 Series Routers Hardware Installation Guide Cisco 2600 Series, 3600 Series, and 3700 Series Regulatory Compliance and Safety Information on Cisco.com IPsec and VPN documentation 802.1x authentication Configuring Cisco IOS Easy VPN Remote with 802.1X Authentication (white paper) VPN Access Control Using 802.1X Local Authentication Access Control Lists Configuration IP Access List Overview Configuration information (additional in-depth) Cisco IOS Security Command Reference -- Provides a reference for each of the Cisco IOS commands used to configure IPsec encryption and related security features. SSL VPN -- Provides information about SSL VPN. cTCP on Cisco Easy VPN remote devices EFT Deployment Guide for Cisco Tunnel Control Protocol on Cisco EasyVPN Dead peer