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Reason why must use vpn than usual connection is the range of the local network owned by a company will become widespread so that the company can develop its business in other areas, the company operational costs will also be reduced when using VPN, internet media has spread throughout the world, because the Internet is used as a public communication media that are open, can open blocked sites, surf the Internet without being tracked original IP that we can secure from hackers, security of information we receive or send very secure because the data is encrypted VPN 1. Does somebody knows how to close a TCP or UDP socket for a single connection via windows command line Googling about this, I saw some people asking the same thing. Cisco IOS GETVPN VRF Aware GDOI GM Solution Deployment Guide Introduction to GETVPN The Cisco IOS GETVPN is a tunnel less VPN technology that provides end to end security for network traffic in a native mode and maintaining the fully meshed topology. It uses the core networks ability to route and replicate the packets between various sites within the enterprise. Cisco IOS GETVPN preserves the original source and destination IP addresses information in the header of the encrypted packet for optimal routing. Hence, it is largely suited for an enterprise running over a private IP enabled network such as MPLS VPN, VPLS, or FRATM. It is also better suited to encrypt IP based multicast and broadcast traffic which might traverse a satellite network or IP multicast enabled core. Cisco IOS GET VPN uses the IETFs standard RFC 3. Group Domain of Interpretation GDOI as the key management protocol and RFC 2. IPSec for encryption. Udp 53 Vpn' title='Udp 53 Vpn' />VRF Aware GDOI Group Member GM. Virtual Routing and Forwarding VRF is a technology that allows multiple instances of a routing table to co exist within the same router at the same time. Introduction to GETVPN. The Cisco IOS GETVPN is a tunnelless VPN technology that provides endtoend security for network traffic in a native mode and maintaining. We offer OpenVPN on ports 80 TCP UDP, 443 TCP UDP and 53 TCP UDP. Additionally, every Air server supports directly OpenVPN over SSH, OpenVPN over SSL and. In a normal GETVPN deployment, both data and control traffic such as registration and re key use the same VRF. In a VRF aware GDOI GM configuration, control traffic can be separated from data traffic using a separate VRF. The GM has the ability to route control traffic registration rekeys through a VRF that is different from the VRF used for routing encrypted data traffic. Basically registration rekeys are routed through one VRF and the policies downloaded are applied to a crypto map applied in a different VRF. Y29tLmluLnRyb2lkdnBuX2x4NWpicmRo/screen-10.jpg?h=800&fakeurl=1&type=.jpg' alt='Udp 53 Vpn' title='Udp 53 Vpn' />A service provider may assign the key management control traffic to a management VRF on a GM where separate designated VRFs are used to service individual customers encrypted traffic. An enterprise could use it for departmental VPNs so they dont have to replicate the key server infrastructure for every department. Purpose and Scope. This document provides basic deployment guidelines to enable Cisco IOS Group Encrypted Transport VPN GETVPN with VRF Aware GDOI feature in an enterprise network. This document does not cover in depth technical details about various features comprising Cisco IOS GETVPN. Please refer to the References section for additional documents. Recommended Platforms and Images. Images based on Cisco IOS Software Release 1. M or above are required for group member routers while it is recommended for key server routers. The recommended image subset is advipservicesk. Key server Cisco 2. CaptureSolidVpn.png' alt='Udp 53 Vpn' title='Udp 53 Vpn' />Series Integrated Service Routers, Cisco 7. Series Routers, Cisco 7. Routers Group member 1. Series Integrated Service Routers ISR, Cisco 7. Series Routers, Cisco 7. Routers, and 1. 90. ISR G2 platforms. Deployment. A new CLI is introduced to configure the registration interface under the GDOI group. This registration interface is used to route the GDOI registrations through the VRF configured on that interface for this particular group and registration requests would be sourced with the IP address configured on the register address interface. After successful registration the IPSec policy will be applied to the interface where the crypto map is applied. GET GROUP1. identity number 1. Fast. Ethernet. 0. Here the Group member will use Fast. Ethernet. 0. 3 interface to register the group GET GROUP1 with configured Key Servers. The future registration and rekey will happen through this interface. If this interface cannot reach any of the configured Key servers, registration of the group will fail. If client registration interface under a GDOI group is not configured, GM will use the either the specified local address configured for the crypto map or the IP address associated with the interface where the crypto map is applied. If client registration interface is not specified then, by default, the registration would happen through the default interfaceVRF where the crypto map is applied and VRF aware GDOI is inherently disabled. Topology Figure 1. VRF Aware GETVPN Topology. In this setup different crypto map applied to different interfaces, each interface is in a different VRF context namely Customer. A and Customer. B. All these groups are accessing the same key servers coop and these key servers are accessible through separate control traffic VRF named management. Sample GM Configuration For Unicast Rekey. Only the necessary commands required to enable VRF Aware GETVPN are shown here. For more VRF details, refer the Full Configuration section. GET GROUP1. identity number 1. Fast. Ethernet. 0. GET GROUP2. identity number 4. Fast. Ethernet. 0. GET GROUP1. crypto map getvpn map. GET GROUP2. interface Fast. Ethernet. 0. 1. encapsulation dot. Q 1. ip vrf forwarding Customer. A. ip address 1. 0. Fast. Ethernet. 0. Q 1. 0. ip vrf forwarding Customer. B. ip address 1. 0. Fast. Ethernet. 0. Q 2. 0. ip vrf forwarding management. Here the registration interface for both groups is the same. There is one registration through the interface Fast. Ethernet. 0. 3 for every group configured and associated with a crypto map. There are two registrations for the above example given. Note that there will be only one IKE SA established for these registrations. For group GET GROUP1 we have the registration interface as Fast. Ethernet. 0. 3, this would represent one Group Member. After successful registration, policies would be downloaded and associated with the crypto map on the interface Fast. Ethernet. 0. 1. For group GET GROUP2 also has the registration interface as Fast. Ethernet. 0. 3, this would represent another GM. After successful registration, policies would be downloaded and associated with the crypto map on the interface Fast. Ethernet. 0. 2. If both registrations are successful with the first Key Server configured, then there would be only one IKE SA established for both the registrations to that key server. Sample KS Configuration For Unicast Rekey. GET GROUP1. identity number 1. A. rekey transport unicast. A acl. address ipv. GET GROUP2. identity number 4. B. rekey transport unicast. B acl. address ipv. Verification PING to the Key Server with client registration interface as source. GM1ping vrf management 1. Ethernet 0. 3. Type escape sequence to abort. Sending 5, 1. 00 byte ICMP Echos to 1. Packet sent with a source address of 1. Success rate is 1. Trace route to the Key Server. GM1traceroute vrf management 1. Type escape sequence to abort. Tracing the route to 1. AS 6. 50. 04 0 msec 4 msec 0 msec. AS 6. 50. 04 0 msec 0 msec. This command displays the active ISAKMP sessions on the router and is common for standard IPSec and GEVPN. The output below is from a Group Member. The ISAKMP SAs with GDOIIDLE status are created as result of GMs registration with KS. Registration SA is same for both GDOI groups as the GM uses the same interface for registration. The SA labeled GDOIREKEY is used for rekey. There will be a separate REKEY SA for each group. GM1sh cry isa sa. IPv. 4 Crypto ISAKMP SA. GDOIREKEY 2. 02. ACTIVE. Live Strip Das Magazin 01 2014. GDOIIDLE 2. 01. 9 ACTIVE. GDOIREKEY 2. 02. ACTIVE. IPv. 6 Crypto ISAKMP SA. Show crypto gdoi. This command displays the all basic details about the GETVPN status. The output is different for Key Server and Group Member. On Group Member. The output shows the GM used the same VRF for registering both groups. GM1show crypto gdoi. GROUP INFORMATION. Group Name GET GROUP1. Group Identity 1. Rekeys received 9. IPSec SA Direction Both. Group Server list 1.