Internet Protocol Security (IPsec) was initially developed by the Internet Engineering Task Force (IETF) for IPv6, which was required in all standards-compliant implementations of IPv6 before RFC 6434 made it only a recommendation.[7] This standards-based security protocol is also widely used with IPv4 and the Layer 2 Tunneling Protocol. Its design meets most security goals: authentication, integrity, and confidentiality. IPsec uses encryption, encapsulating an IP packet inside an IPsec packet. De-encapsulation happens at the end of the tunnel, where the original IP packet is decrypted and forwarded to its intended destination.

When using the OpenVPN protocol, many VPN apps will give you the option of using either the TCP or UDP protocol. TCP is the protocol that you normally use to browse the web and download files. UDP is more common for streaming applications such as video, music, and gaming. The difference is in how computers and servers send network packets, the unit of data used to exchange information over the internet.
Voluntary tunneling occurs when a client computer or routing server creates a virtual connection to the target tunnel server. To accomplish this, tunneling client software and the appropriate tunneling protocol must be installed on the client computer. For the protocols discussed in this technical reference, voluntary tunnels require an IP connection (either LAN or dial-up).

L2TP uses UDP messages over IP networks for both tunnel maintenance and tunneled data. The payloads of encapsulated PPP frames can be encrypted or compressed (or both); however, L2TP clients do not negotiate the use of MPPE for L2TP connections. Encryption for L2TP connections is provided by IPSec Encapsulating Security Payload (ESP) in transport mode.


ExpressVPN sets the bar when it comes to download speed. It’s always near the top of the rankings, albeit never at the peak. Consistency is a defining factor of Express; volatility is rarely an issue that affects the outcome of test results. Connections drop a little more often than we’d like them to, but the company has done a remarkable job considering the size of the network it manages.

What that means in practice is that VPNs are fine for bypassing geo-blocks, for protecting your online banking and for keeping business communications free from interception. However, if you’re using the internet to fight repressive regimes or to do anything else that could attract the attention of the authorities where you live, a VPN is not a magic wand that’ll make you invisible.

With the increasing use of VPNs, many have started deploying VPN connectivity on routers for additional security and encryption of data transmission by using various cryptographic techniques.[33] Home users usually deploy VPNs on their routers to protect devices, such as smart TVs or gaming consoles, which are not supported by native VPN clients. Supported devices are not restricted to those capable of running a VPN client.[34]
Norton WiFi Privacy is a VPN solution that is specifically designed for mobile devices. It is downloadable from the App Store or the Google Play Store. The software is capable of protecting users from the dangers associated with public Wi-Fi hotspots. It has the capability to block ads, which automatically hides advertisements while preventing sites from tracking user location.
In compulsory tunneling, the client computer places a dial-up call to a tunneling-enabled NAS at the ISP. For example, a corporation might have contracted with an ISP to deploy a nationwide set of FEPs. These FEPs can establish tunnels across the Internet to a tunnel server connected to the organization’s private network, thus consolidating calls from geographically diverse locations into a single Internet connection at the organization network.
Like most well-known VPN companies, IVPN supports a variety of privacy groups and causes. Pestell told us he worked with the Center for Democracy & Technology to improve trust in VPNs with a handful of transparency initiatives before they were announced. Neena Kapur of The New York Times (parent company of Wirecutter) information security team noted that IVPN’s leadership transparency and its relationship with CDT were significant pluses that contributed to its trustworthiness. Pestell was also the only representative we spoke with to offer to arrange for one of our experts to audit the company’s server and no-logging policies.1 We cover trust issues with VPNs at length elsewhere in this guide, but we believe that IVPN takes an active role in protecting its customers’ privacy and is not a dude wearing a dolphin onesie.
Also, do be aware that some broadcasters have developed increasingly sophisticated methods to determine whether the IP address you represent is the IP address where you're located. The VPN may be able to protect your original IP address from being seen, but there are characteristics of proxy communications (like a slightly longer time to transfer packets) that can be used to identify users who are trying to bypass watching restrictions.

IVPN exceeded our requirements for being trustworthy and transparent. It also offers good performance without sacrificing security, and it's easy to set up and use on nearly any device running Windows, macOS, Android, or iOS. Other VPNs we tested had faster connections at particular server locations or lower prices, but they came up short on essential factors such as transparency about who exactly runs them. If you're ready for a VPN, we think IVPN is worth the price, even considering competitors with cheaper options. If you're not ready to commit, you can try it out with a seven-day money-back guarantee. It's easy and obvious to turn off automatic billing, too.

The main drawback with VyprVPN is their connection log policies. They keep connection logs for 30 days, but usage/activity logs are never kept. Another slight drawback is that they do not permit torrenting on their network. But on a positive note, they are very honest and straightforward about their policies, unlike some VPNs that falsely claim to be “no logs”.
IVPN excels at trust and transparency, the most important factors when you’re choosing a virtual private network. After interviewing IVPN’s CEO, we’re convinced that IVPN is dedicated to its promises not to monitor or log customer activity. But a trustworthy VPN is only as good as its connections, and in our tests IVPN was stable and fast. IVPN apps are easy to set up and use with secure OpenVPN connections on Windows, macOS, Android, iOS, plus a few other platforms. Extra features like automatic-connection rules and kill switches to block data on unsecured connections add protection and value that make it worth a slightly higher price than some competitors.
Consumers use a private VPN service, also known as a VPN tunnel, to protect their online activity and identity. By using an anonymous VPN service, a user's Internet traffic and data remain encrypted, which prevents eavesdroppers from sniffing Internet activity. VPN services are especially useful when accessing public Wi-Fi hotspots because the public wireless services might not be secure. In addition to public Wi-Fi security, a private VPN service also provides consumers with uncensored Internet access and can help prevent data theft and unblock websites.
Prices – PureVPN is currently offering three subscription plans: 1-month, 1-year, and 2-year deals. The cheapest subscription deal is the 2-year plan which you can avail for only $2.49/month. It is always a pleasure to have a great product being sold for so cheap. A new addition that I found during PureVPN review was its bumped-up 31-day money-back guarantee, which means that you can even go for a refund if you are not satisfied with it.
Extensible Authentication Protocol (EAP) is a PPP authentication protocol that allows for an arbitrary authentication method. EAP differs from the other authentication protocols in that, during the authentication phase, EAP does not actually perform authentication. Phase 2 for EAP only negotiates the use of a common EAP authentication method (known as an EAP type). The actual authentication for the negotiated EAP type is performed after Phase 2.
Developed by Institute of Electrical and Electronics Engineers, VLANs allow multiple tagged LANs to share common trunking. VLANs frequently comprise only customer-owned facilities. Whereas VPLS as described in the above section (OSI Layer 1 services) supports emulation of both point-to-point and point-to-multipoint topologies, the method discussed here extends Layer 2 technologies such as 802.1d and 802.1q LAN trunking to run over transports such as Metro Ethernet.

Hotspot Shield depends on a custom VPN protocol that's not been publicly analyzed by independent experts. We don't know how private or secure it really is. The company has been accused of spying on users (it denies the allegations), and complaints abound online about Hotspot Shield software installing on PCs without users' permission. All this, and the company's U.S. location, may scare away customers who want to protect their privacy.

As we previously noted, we don’t recommend relying on our picks to get around geographic restrictions on copyrighted content. The practice is likely illegal, and it violates the terms of service of your ISP, VPN, and content provider. On top of that, it often doesn’t work—we couldn’t access Netflix over any of the services we tried, and of the four streams we loaded on BBC iPlayer, only two worked a few days later.


To narrow the hundreds of VPN providers down to a manageable list, we first looked at reviews from dedicated sites like vpnMentor and TorrentFreak, research and recommendations from noncommercial sources such as That One Privacy Site and privacytools.io, and user experiences and tips on various subreddits and technology-focused websites like Lifehacker and Ars Technica. We settled on 32 VPNs that were repeatedly recommended. From there, we dug into the details of how each one handled issues from technology to subscriptions:
StrongVPN has exit nodes in 43 cities, 20 countries, and supports PPTP, L2TP, SSTP, IPSec, and OpenVPN protocols–you’ll be hard pressed to find a device you can’t configure to use their service. There are no bandwidth caps, speed limits, or restrictions on protocols or services (torrenting, Netflix, you name it, they don’t care). Additionally, StrongVPN maintains no server logs.
One of today’s leading VPN providers and another worthy mention on our list of top 20 VPN services, PureVPN is known for its service quality and customer support. The service has 450 servers in 101 countries, allowing users to surf the Internet and use any online solution without having to reveal their IP address. This is very useful to those who want to bypass Internet censorship.

Then there’s the widespread surveillance by local and foreign governments. Through the Snowden leaks and years of follow-up reporting, we know that the worldwide surveillance structure is vast in scope and reach. While it would be illegal for police officers to search your home without a warrant, your browsing activity, messages, social media content, and other online information can be monitored, retained and shared among various government agencies, including across country borders.
It can be made to work at a push in China but there’s better options available. Customer support is improving. IPVanish isn’t cheap but it only requires a 2-year commitment to slash the monthly price by 69% to a reasonable $3.74. If P2P is your priority then IPVanish really is a superb VPN for both privacy and performance that will also cover many other needs.
Remote access data encryption does not provide end-to-end data encryption. End-to-end encryption is data encryption between the client application and the server that hosts the resource or service being accessed by the client application. To get end-to-end data encryption, use IPSec to help create a secure connection after the remote access connection has been made.

Something pretty great about Speedify is that you can use it for free without even making an account. The moment you install and open the software, you're immediately being protected behind a VPN and can do anything a user can, like change the server, toggle encryption on and off, set monthly or daily limits, and easily connect to the fastest server.


For VPN connections, however, IP datagrams sent across the Internet can arrive in a different order from the one in which they were sent, and a higher proportion of packets can be lost. Therefore, for VPN connections, MPPE changes the encryption key for each packet. The decryption of each packet is independent of the previous packet. MPPE includes a sequence number in the MPPE header. If packets are lost or arrive out of order, the encryption keys are changed relative to the sequence number.
Consider a public Wi-Fi network, perhaps at a coffee shop or airport. Usually, you would connect without a second thought, but do you know who might be keeping tabs on the network traffic? Can you even be confident the hotspot is legitimate, or might it be operated by a criminal who's hunting for your personal data? Think about the passwords, banking details, credit card numbers, and just any private information that you send every time you go online.
For inbound traffic, when the tunneled data is decrypted by the VPN server it is forwarded to the firewall, which employs its filters to allow the traffic to be forwarded to intranet resources. Because the only traffic that is crossing the VPN server is traffic generated by authenticated VPN clients, firewall filtering in this scenario can be used to prevent VPN users from accessing specific intranet resources.
It is possible for some background services to send information across that initial, unsecured connection before the VPN loads. To be fair, the risk is relatively minor for most usage profiles. If you're establishing a connection automatically to your corporate server, you will definitely want to check with your IT team about how they want you to set things up.
One of today’s leading VPN providers and another worthy mention on our list of top 20 VPN services, PureVPN is known for its service quality and customer support. The service has 450 servers in 101 countries, allowing users to surf the Internet and use any online solution without having to reveal their IP address. This is very useful to those who want to bypass Internet censorship.

The software supports Windows, Mac, iOS and Android devices. It also has plugins for browsers such as Chrome and Opera. This feature basically protects any device that can run a browser. Installation takes only seconds and does not require additional tweaking. The app’s Vigilant Mode prevents data from leaking while TunnelBear is reconnecting. The solution can also disguise VPN traffic as normal HTTPS traffic. As for security, the platform provides a list of Wi-Fi network that can be trusted.


Hotspot Shield depends on a custom VPN protocol that's not been publicly analyzed by independent experts. We don't know how private or secure it really is. The company has been accused of spying on users (it denies the allegations), and complaints abound online about Hotspot Shield software installing on PCs without users' permission. All this, and the company's U.S. location, may scare away customers who want to protect their privacy.
Free VPN Providers are more likely to log your activities and serve contextual ads while you’re connected. They’re also more likely to use your usage habits to tailor future ads to you, have fewer exit locations, and weak commitments to privacy. They may offer great features, but if logging and privacy are important to you, you may want to avoid them. However, if you just need quick, painless security while traveling on a budget, they’re a great option.
OVPN was regularly the fastest VPN in our tests regardless of the time of week or location. We also liked the app’s clean design and its simple and well-labeled settings pane. But OVPN is a small startup with a limited server network: At this writing, the company has servers in just seven countries, none in Asia. That makes it less versatile for finding less congested routes or geoshifting. OVPN also hasn’t released an Android app yet, so even non-iOS device owners will have to resort to the clunky, third-party OpenVPN Connect app on their phones. When we reached out for details about the company’s operational security, founder and CEO David Wibergh was open to questions and gave us answers that led us to believe that the company acted in the best interest of its customers’ privacy and security. He noted that after an uptick in data requests from local authorities in Sweden—all of which OVPN responded to by explaining that it lacked any pertinent data—the company published a blog post to detail just how little information it keeps.
Speed should not be all you consider when shopping for a VPN. For one thing, your internet experience will almost certainly be faster without a VPN. For another, speeds depend so much on which server you use, where you are, what your network environment is like, and so on. You might find that the service that's lightning fast today is dog slow tomorrow.
Netflix blocking paying customers might seem odd, but it's all about regions and not people. Just because you paid for Netflix in one place does not mean you're entitled to the content available on the same service but in a different location. Media distribution and rights are messy and complicated. You may or may not agree with the laws and terms of service surrounding media streaming, but you should definitely be aware that they exist and understand when you're taking the risk of breaking them. Netflix, for its part, lays out how that it will attempt to verify a user's location in order to provide content in section 6c of its Terms of Use document.
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