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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: 461 Bruno Olvera Jasso
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: 32545 NYC Networkers
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: 2941 DellTechCenter
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: 138686 Blog'n'Vlog
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: 45120 José Martín
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: 206378 soundtraining.net
FortiGate Cookbook - IPsec VPN with FortiClient (5.6)
 
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Want to learn more? Watch our other Cookbook videos here: https://www.youtube.com/playlist?list=PLLbbcH8MnXJ5UV22hUQRIv0AHSqp81Ifg In this video, you will allow remote users to access the corporate network using an IPsec VPN that they connect to with FortiClient. The remote user's Internet traffic will also be routed and secured by the FortiGate. This tutorial uses FortiClient version 5.4.2 build 523 on a Mac OS X. Visit Fortinet's documentation library at http://docs.fortinet.com or our video portal at http://video.fortinet.com. Best viewed in 1080p. Copyright Fortinet Technologies Inc. 2012-2018. All rights reserved.
Views: 40169 Fortinet
Enabling TLS 1.2 in Internet Explorer
 
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Enable TLS 1.2 in Internet Explorer to connect securely to servers that support Transport Layer Security. Brought to you by https://lockbin.com Try Lockbin's free service for sending secure email messages to clients and patients. Since this video was made, we have seen strong adoption of TLS 1.2 across the internet, and we now recommend disabling all SSL and TLS 1.0, and enabling only TLS 1.2, 1.1.
Views: 39220 Encryptomatic LLC
Breaking News: Everything There is to Know About the 2020 Chevy Silverado HD!
 
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( http://www.patreon.com/tflcar ) Please visit to support TFLcar & TFLtruck. Everything There is to Know About the 2020 Chevrolet Silverado HD! Check us out on: Facebook: ( https://www.facebook.com/tfltruck ) Twitter: ( https://www.twitter.com/tfltruck ) and now even Truck Videos on YouTube at: The Fast Lane Truck ( http://www.youtube.com/user/tflcar ) and classic cars as well at: TFLClassics ( http://www.youtube.com/user/ClassicsUnleashed )
Views: 323448 The Fast Lane Truck
What is PRE-SHARED KEY? What does PRE-SHARED KEY mean? PRE-SHARED KEY meaning & explanation
 
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What is PRE-SHARED KEY? What does PRE-SHARED KEY mean? PRE-SHARED KEY meaning - PRE-SHARED KEY definition - PRE-SHARED KEY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, a pre-shared key (PSK) 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 is typically used. Such systems almost always use symmetric key cryptographic algorithms. The term PSK is used in Wi-Fi encryption such as Wired Equivalent Privacy (WEP), Wi-Fi Protected Access (WPA), where the method is called WPA-PSK or WPA2-PSK, and also in the Extensible Authentication Protocol (EAP), where it is known as EAP-PSK. In all these cases, both the wireless access points (AP) and all clients share the same key. The characteristics of this secret or key are determined by the system which uses it; some system designs require that such keys be in a particular format. It can be a password, a passphrase, or a hexadecimal string. The secret is used by all systems involved in the cryptographic processes used to secure the traffic between the systems. Crypto systems rely on one or more keys for confidentiality. One particular attack is always possible against keys, the brute force key space search attack. A sufficiently long, randomly chosen, key can resist any practical brute force attack, though not in principle if an attacker has sufficient computational power (see password strength and password cracking for more discussion). Unavoidably, however, pre-shared keys are held by both parties to the communication, and so can be compromised at one end, without the knowledge of anyone at the other. There are several tools available to help one choose strong passwords, though doing so over any network connection is inherently unsafe as one cannot in general know who, if anyone, may be eavesdropping on the interaction. Choosing keys used by cryptographic algorithms is somewhat different in that any pattern whatsoever should be avoided, as any such pattern may provide an attacker with a lower effort attack than brute force search. This implies random key choice to force attackers to spend as much effort as possible; this is very difficult in principle and in practice as well. As a general rule, any software except a Cryptographically secure pseudorandom number generator should be avoided.
Views: 2546 The Audiopedia
The Cryptographic Protocol - what are the techniques of cryptography?
 
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Want to learn more about Cryptocurrency and the Cryptographic Protocols? Watch the video below to see how simple & effective, Bitcoin trading can really be https://goo.gl/q8kdDV .... A protocol is a set of rules. It describes the proper protocol for certain actions and behaviors. David Johnston, the Governor General of Canada, broke protocol when he touched Queen Elizabeth II on the steps of Canada House on Trafalgar Square in London. The Queen was 91 years old at the time and the Governor General touched her arm to protect her from falling on the steps. It is protocol to not touch a member of Britain’s royal family. methods. Specific topics include: 1. Overview of communications channels used in power systems. 2. Review of cryptographic protocols and how they work. 3. How cryptography can impact monitoring, control, and protection communications. 4. Differences between substation communications systems and corporate The confidentiality and integrity protections offered by cryptographic protocols such as SSL/TLS can protect communications from malicious eavesdropping and tampering. Authenticity protections provide assurance that users are actually communicating with the systems as intended. For example, are you sending your Often cryptographic algorithms and protocols are necessary to keep a system secure, particularly when communicating through an untrusted network such as the Internet. Where possible, use cryptographic techniques to authenticate information and keep the information private (but don't assume that simple encryption SUMMARY. This project will focus on research in cryptology at an advanced international level. Project topics will be analysis and construction of symmetric and asymmetric cryptographic algorithms and protocols. In particular we will use our knowledge involving deep techniques from coding theory on cryptological. What is a cryptographic protocol? A cryptographic protocol is a protocol executed by several distant agents through a network where the messages or part of the messages are produced using cryptographic functions (encryption, hashing, etc.). Cryptographic protocols are used for various purpose between the agents:. May 7, 2006 - This is regarded as offensive because of the malicious payload normally embedded in the virus, and because of the use of anti-anti-virus techniques For instance, on networks some layer 2 protocols are based on crypto (WEP, WPA/TKIP, and others), as are some upper layer protocols (IPSec, SSH, SSL, primitives such as commutative encryption. We give a list of some relevant al- gebraic properties of cryptographic operators, and for each of them, we provide examples of protocols or attacks using these properties. We also give an overview of the existing methods in formal approaches for analyzing cryptographic proto-. Using cryptographic techniques, it may be possible to allow intermediate results in a distributed algorithm to be certified independently of who provides them, reducing themes of complexity theory, e.g., interactive provability, average vs. worst-case complexity, and the inherent communication costs of multiparty protocols. Web is an electronic protocol which allows people to communicate mail, information, and commerce through a digital medium. This new method of information exchange has caused a tremendous need for information security. A thorough understanding of cryptography and encryption will help people develop better ways to etc. The analysis techniques discussed in this survey assume per- fect cryptography. This means that cryptographic primitives are considered as black boxes satisfying certain properties, as described in section 2.1. below. This assumption by it- self does not ensure security of the protocols. Even if all cryptographic primitives The Cryptographic Protocol what are the techniques of cryptography types of cryptographic algorithms cryptography methods types of cryptography cryptography examples cryptography algorithms applications of cryptography cryptography basics cryptography computer science #TheCryptographicProtocolwhatarethetechniquesofcryptography #typesofcryptographicalgorithms #cryptographymethods #typesofcryptography #cryptographyexamples #cryptographyalgorithms #applicationsofcryptography #cryptographybasics #cryptographycomputerscience Visit our YouTube channel for more videos on Bitcoin and Cryptocurrency https://www.youtube.com/channel/UCTxqXgVxEGQUIFY_MdRz5ww Also watch: https://www.youtube.com/watch?v=kH6u_CsQddE https://www.youtube.com/watch?v=W4LlCYVP65A This presentation contains images that were used under a Creative Commons License. Click here to see the full list of images and attributions: https://app.contentsamurai.com/cc/107949
Views: 107 BitCoin XTreme
Features new to Windows XP
 
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Windows XP introduced many features not found in previous versions of Windows. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 521 Audiopedia
Google News vs. Apple News on iOS
 
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Google recently introduced a new Google News app with an entirely updated interface and a range of new features that put it on par with Apple's own News app, including a "For You" recommendation section and "Full Coverage" headlines that present a story from multiple angles. We went hands-on with Google News to check out the new features and to see how it compares to Apple News, the built-in news app that's available on the iPhone and the iPad. Read more - https://www.macrumors.com/2018/05/18/google-news-vs-apple-news/
Views: 38022 MacRumors
Windows XP
 
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Windows XP is a personal computer operating system produced by Microsoft as part of Windows NT family of operating systems. The operating system was released to manufacturing on August 24, 2001, and generally released for retail sale on October 25, 2001. Development of XP began in the late 1990s as "Neptune", an operating system built on the Windows NT kernel which was intended specifically for mainstream consumer use—an updated version of Windows 2000 was also originally planned for the business market. However, in January 2000, both projects were shelved in favor of a single OS codenamed "Whistler", which would serve as a single OS platform for both consumer and business markets. Windows XP was a major advance from the MS-DOS based versions of Windows in security, stability and efficiency due to its use of Windows NT underpinnings. It introduced a significantly redesigned graphical user interface and was the first version of Windows to use product activation in an effort to reduce software piracy. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 117 Audiopedia