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IPSec Site to Site VPN tunnels
 
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This demo walks through the purpose and workings of an IPSec VPN tunnel, including implementation and verification of the tunnel. Enjoy!
Views: 350280 Keith Barker
Understanding AH vs ESP and ISKAKMP vs IPSec in VPN tunnels
 
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This is a sniplet from the Cisco SIMOS course, where we discuss the logical constructs behind a site-to-site IPSec VPN. I hope that this content helps you understand what's happening behind the scenes of your VPN's.
Views: 165980 Ryan Lindfield
IPsec VPN Tunnel
 
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Pre-setup: Usually this is the perimeter router so allow the firewall. Optional access-list acl permit udp source wildcard destination wildcard eq isakmp access-list acl permit esp source wildcard destination wildcard access-list acl permit ahp source wildcard destination wildcard You need to enable to securityk9 technology-package Router(config)#license boot module c2900 technology-package securityk9 Router(config)#reload Task 1: Configure the ISAKMP policy for IKE Phase 1 There are seven default isakmp policies. The most secure is the default. We will configure our own. You can remember this by HAGLE. Hash, Authentication, Group (DH), Lifetime, Encryption. Router(config)#crypto isakmp policy 1 Router(config-isakmp)#hash sha Router(config-isakmp)#authentication pre-share Router(config-isakmp)#group 5 Router(config-isakmp)#lifetime 3600 Router(config-isakmp)#encryption aes 256 We used a pre-shared key for authentication so we need to specify the password for the first phase. Router(config)#crypto isakmp key derpyisbestpony address 208.77.5.1 show crypto isakmp policy Task 2: Configure the IPsec Policy for IKE Phase 2 Configure the encryption and hashing algorithms that you will use for the data sent thought the IPsec tunnel. Hence the transform. Router(config)#crypto ipsec transform-set transform_name esp-aes esp-sha-hmac Task 3: Configure ACL to define interesting traffic Even though the tunnel is setup it doesn’t exist yet. Interesting traffic must be detected before IKE Phase 1 negotiations can begin. Allow the local lan to the remote lan. Router(config)#access-list 101 permit ip 192.168.0.0 0.0.0.255 10.0.0.0 0.0.0.255 show crypto isakmp sa Task 4: Configure a Crypto Map for the IPsec Policy Now that interesting traffic is defined and an IPsec transform set is configured, you need to bind them together with a crypto map. Rotuer(config)# crypto map map_name seq_num ipsec-isakmp What traffic will be interesting? The access-list we made before. Router(config-crypto-map)#match address 101 The transform-set we created earlier for the IPsec tunnel. Router(config-crypto-map)# set transform-set transform_name The peer router you’re connecting to. Router(config-crypto-map)#set peer 172.30.2.2 You need to set the type of DH you want to use. Router(config-crypto-map)#set pfs group5 How long these setting will last before it’s renegotiated Router(config-crypto-map)#set security-association lifetime seconds 900 Task 5: Apply the IPsec Policy Apply the crypto map to the interface. Router(config)#interface serial0/0/0 Router(config-if)#crypto map map_name show crypto map derpy: http://th03.deviantart.net/fs71/PRE/f/2012/302/6/1/derpy_hooves_by_freak0uo-d5jedxp.png twilight: http://fc03.deviantart.net/fs70/i/2012/226/e/5/twilight_sparkle_vector_by_ikillyou121-d56s0vc.png
Views: 12975 Derpy Networking
Cisco ASA Basic VPN Tunnel Troubleshooting
 
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nycnetworkers.com meetup.com/nycnetworkers A video on some basic VPN Tunnel troubleshooting steps for the Cisco ASA
Views: 35029 NYC Networkers
Cisco ASA Site-to-Site VPN Configuration (Command Line):  Cisco ASA Training 101
 
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http://www.soundtraining.net Author, speaker, and IT trainer Don R. Crawley demonstrates how to configure a site-to-site VPN between two Cisco ASA security appliances. The demo is based on software version 8.3(1) and uses IPSec, ISAKMP, tunnel-groups, Diffie-Hellman groups, and an access-list. The demo is based on the popular book "The Accidental Administrator: Cisco ASA Security Appliance: Step-by-Step Configuration Guide (http://amzn.com/1449596622) and includes a link where you can download a free copy of the configs and the network diagram.
Views: 212924 soundtraining.net
VPN en Cisco Packet Tracer
 
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Simulación de una VPN en Cisco Packet Tracer. Archivo pkt: https://mega.nz/#!u4ZVXahT!AC82eMt_JkYNltPowhdRJcFdZ8klOHEfIzUJYzsty2E Los comandos utilizados para configurar los routers son: (Router 1) crypto isakmp policy 10 authentication pre-share hash sha encryption aes 256 group 2 lifetime 86400 exit crypto isakmp key toor address 10.0.0.2 (router 2) crypto ipsec transform-set TSET esp-aes esp-sha-hmac access-list 101 permit ip 192.168.10.0 0.0.0.255 192.168.20sho.0 0.0.0.255 (Direccion red 1 y red 2) crypto map CMAP 10 ipsec-isakmp set peer 10.0.0.2 (Router 2) match address 101 set transform-set TSET exit interface fa0/1 (Interface a Router 2) crypto map CMAP do wr (Router 2) crypto isakmp policy 10 authentication pre-share hash sha encryption aes 256 group 2 lifetime 86400 exit crypto isakmp key toor address 10.0.0.1 (router 1) crypto ipsec transform-set TSET esp-aes esp-sha-hmac access-list 101 permit ip 192.168.20.0 0.0.0.255 192.168.10.0 0.0.0.255 (Direccion red 2 y red 1) crypto map CMAP 10 ipsec-isakmp set peer 10.0.0.1 (Router 1) match address 101 set transform-set TSET exit interface fa0/1 (Interface a Router 1) crypto map CMAP do wr Los comandos para ver los paquetes enviados y recibidos y comprobar que fueron encriptados/desencriptados son: show crypto isakmp sa show crypto ipsec sa
Views: 49439 José Martín
Cisco ASA - Remote Access VPN (IPSec)
 
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How to quickly set up remote access for external hosts, and then restrict the host's access to network resources.
Views: 142659 Blog'n'Vlog
Configurando VPN - Packet Tracer
 
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Trabalho acadêmico de alunos do curso de Redes de computadores - UNIFACS Códigos: (Router 1) crypto isakmp policy 10 authentication pre-share hash sha encryption aes 256 group 2 lifetime 86400 exit crypto isakmp key toor address 10.0.0.2 (router 2) crypto ipsec transform-set TSET esp-aes esp-sha-hmac access-list 101 permit ip 192.168.1.0 0.0.0.255 192.168.2.0 0.0.0.255 crypto map CMAP 10 ipsec-isakmp set peer 10.0.0.2 (Router 2) match address 101 set transform-set TSET exit interface fa0/0 crypto map CMAP do wr (Router 2) crypto isakmp policy 10 authentication pre-share hash sha encryption aes 256 group 2 lifetime 86400 exit crypto isakmp key toor address 10.0.0.1 (router 1) crypto ipsec transform-set TSET esp-aes esp-sha-hmac access-list 101 permit ip 192.168.20.0 0.0.0.255 192.168.10.0 0.0.0.255 crypto map CMAP 10 ipsec-isakmp set peer 10.0.0.1 (Router 1) match address 101 set transform-set TSET exit interface fa0/0 crypto map CMAP do wr Para visualizar os pkts: show crypto isakmp sa show crypto ipsec sa
Views: 1512 Gustavo Calmon
Multilink VPN, visibilidad Internet y redes IPSec
 
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Show crypto isakmp sa The following four modes are found in IKE main mode MM_NO_STATE* – ISAKMP SA process has started but has not continued to form (typically due to a connectivity issue with the peer) MM_SA_SETUP* – Both peers agree on ISAKMP SA parameters and will move along the process MM_KEY_EXCH* – Both peers exchange their DH keys and are generating their secret keys. (This state could also mean there is a mis-matched authentication type or PSK, if it does not proceed to the next step) MM_KEY_AUTH* – ISAKMP SA’s have been authenticated in main mode and will proceed to QM_IDLE immediately. The following three modes are found in IKE aggressive mode AG_NO_STATE** – ISAKMP SA process has started but has not continued to form (typically do to a connectivity issue with the peer) AG_INIT_EXCH** – Peers have exchanged their first set of packets in aggressive mode, but have not authenticated yet. AG_AUTH** – ISAKMP SA’s have been authenticated in aggressive mode and will proceed to QM_IDLE immediately. The following mode is found in IKE Quick Mode, phase 2 QM_IDLE*** – The ISAKMP SA is idle and authenticated Here are a few more commands we can issue to get a quick glimpse of the status of any IPSec VPN’s. sh crypto ipsec sa – Now this output can really daunting at first just due to the amount of information that is displayed here but there are a few key things to watch out for. Such as the #pkts encaps/encrypt/decap/decrypt, these numbers tell us how many packets have actually traversed the IPSec tunnel and also verifies we are receiving traffic back from the remote end of the VPN tunnel. This will also tell us the local and remote SPI, transform-set, DH group, & the tunnel mode for IPSec SA. sh crypto session Up-Active – IPSec SA is up/active and transferring data. Up-IDLE – IPSsc SA is up, but there is not data going over the tunnel Up-No-IKE – This occurs when one end of the VPN tunnel terminates the IPSec VPN and the remote end attempts to keep using the original SPI, this can be avoided by issuing crypto isakmp invalid-spi-recovery Down-Negotiating – The tunnel is down but still negotiating parameters to complete the tunnel. Down – The VPN tunnel is down. So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. Next up we will look at debugging and troubleshooting IPSec VPNs * – Found in IKE phase I main mode ** – Found in IKE phase I aggressive mode *** – Found in IKE phase II quick mode DE NADA SIRVE MONTAR UNA SONDA SINO SE APLICA EL CORRECTIVO, QUEDARIA CON UP-NO-IKE Otro punto es que es multipoint pero al final son IP´s fijas en ambos extremos remoto y central.
Views: 472 Bruno Olvera Jasso
Pre-shared key
 
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In cryptography, a pre-shared key is a shared secret which was previously shared between the two parties using some secure channel before it needs to be used. To build a key from shared secret, the key derivation function should be used. Such systems almost always use symmetric key cryptographic algorithms. The term PSK is used in Wi-Fi encryption such as Wired Equivalent Privacy, Wi-Fi Protected Access, where the method is called WPA-PSK or WPA2-PSK, and also in the Extensible Authentication Protocol, where it is known as EAP-PSK. In all these cases, both the wireless access points and all clients share the same key. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 7222 Audiopedia
Configuring IPSec Site to Site VPN in FTD using FMC
 
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You'll learn how to configure IPSec Site to Site VPN on FTD using FMC Firepower Threat Defense. Linkedin: https://www.linkedin.com/in/nandakumar80/
Cisco router IPSEC VPN configuration
 
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This video is the full length version of Part 1 and 2: How to setup a Site-to-Site VPN tunnel between two cisco routers
Views: 147151 3CITech
ASA VPN - Packet Tracer and Syslog Troubleshooting Part 2
 
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This is part 2 of a 2 part video that demonstrates how to configure an IPSEC L2L VPN tunnel on a Cisco ASA, and then troubleshoot connectivity issues using Packet-Tracer and logging. Part 2 demonstrates how to configure logging for IKE and IPSEC while continuing to use Packet Tracer in order to troubleshoot the tunnel configuration.
Views: 11038 David Hill
Conditional Debug on Cisco router
 
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http://gns3vault.com Conditional debug is useful when you want to see more specific debug information. Instead of having your screen flooded with debug information you can filter it per interface and more.
Views: 8893 GNS3Vault
How to troubleshoot the VPN Error: No Proposal Chosen
 
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Learn about how to troubleshoot the VPN Error: No Proposal Chosen, “SonicWall video solutions” https://fuzeqna.com/sonicwallkb/ext/kbdetail.aspx?kbid=3902
Views: 3408 DellTechCenter
How to Setup a Cisco Router VPN (Site-to-Site):  Cisco Router Training 101
 
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http://www.soundtraining.net/bookstore In this VPN tutorial video, author, speaker, and IT trainer Don R. Crawley demonstrates how to configure a site-to-site VPN between two Cisco routers. The demo is based on software version 12.4(15)T6 and uses IPSec, ISAKMP, tunnel-groups, Diffie-Hellman groups, and an access-list. The demo is based on the popular book "The Accidental Administrator: Cisco Router Step-by-Step Configuration Guide (http://amzn.com/0983660727) and includes a link where you can download a free copy of the configs and the network diagram.
Views: 213097 soundtraining.net
Part 1 : How to setup a Site-to-Site VPN tunnel between two cisco routers
 
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Part One of two videos showing how to create a Site to Site VPN tunnel between Cisco Routers.
Views: 163736 3CITech

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