Instead of logically tying the endpoint of the network tunnel to the physical IP address, each tunnel is bound to a permanently associated IP address at the device. The mobile VPN software handles the necessary network-authentication and maintains the network sessions in a manner transparent to the application and to the user.[30] The Host Identity Protocol (HIP), under study by the Internet Engineering Task Force, is designed[by whom?] to support mobility of hosts by separating the role of IP addresses for host identification from their locator functionality in an IP network. With HIP a mobile host maintains its logical connections established via the host identity identifier while associating with different IP addresses when roaming between access networks.
Individuals that access the internet from a computer, tablet or smartphone will benefit from using a VPN. A VPN service will always boost your security by encrypting and anonymizing all of your online activity. Therefore, both private and business users can benefit from using a VPN. Communications that happen between the VPN server and your device are encrypted, so a hacker or website spying on you wouldn't know which web pages you access. They also won't be able to see private information like passwords, usernames and bank or shopping details and so on. Anyone that wants to protect their privacy and security online should use a VPN.
Kodi is becoming the next biggest platform for streaming world’s content, and it’s not possible that binge-watchers are unaware of this gigantic media center. Kodi community would relate the only reality that Kodi addons are geo-restricted; you need to be in the specific region to stream your desired or better to say all the best Kodi addons. Kodi is all about streaming content using addons, means if you’re planning to use a Kodi VPN to stream addons, make sure the VPN should be uber-fast.
Known for its speed, ease of use and native clients, HideIPVPN supports Windows, Mac, iOS and Android platforms. Its Smart DNS service is known to be able to unblock some sites. The service supports a variety of protocols, which include SSTP, OpenVPN, SoftEther, PPTP and L2TP/IPSec. With the service, torrenting is allowed although only on German and Dutch servers, this is due to the fact that it only has seven server locations in North America and Europe.
If you’re seriously concerned about government surveillance—we explain above why that should be most people’s last consideration when choosing a VPN—some expert sites like privacytools.io recommend avoiding services with a corporate presence in the US or UK. Such experts warn about the “14 eyes,” a creepy name for a group of countries that share intelligence info, particularly with the US. IVPN is based in Gibraltar, a British Overseas Territory. We don’t think that makes you any worse off than a company based in Switzerland, Sweden, or anywhere else—government surveillance efforts around the world are so complicated and clandestine that few people have the commitment, skills, or technology to avoid it completely. But because Gibraltar’s status has been a topic of debate in other deep dives on VPNs, we’d be remiss if we didn’t mention it.
If your needs are more serious than watching Netflix or keeping some war kiddie at the coffee shop from snooping on your social media activity, a VPN may not be for you. Many VPNs promise anonymity, but few can actually provide it–and you’re still trusting the VPN provider with access to your traffic, which isn’t ideal. For that, you likely want something more like Tor, which–while not perfect–is a better anonymity solution than VPNs.
Computer and software providers work hard to make sure that the devices you buy are safe right out of the box. But they don't provide everything you'll need. Antivirus software, for example, consistently outperforms the built-in protections. In the same vein, VPN software lets you use the web and Wi-Fi with confidence that your information will remain secure. It's critically important and often overlooked.
We wouldn’t want you to have to put up with any of that, so we tested over 100 free VPNs to see which ones are the best of the best. We’re happy to say we found several that meet our strict security standards. Are they the perfect solution? Definitely not, but if you’re looking for a free VPN that can get the job done, you should be able to find one here that can suit your needs.
Speedify's drawbacks are that you can't connect manually (it's software-based), the cellular-data usage will cut into your carrier's monthly limit, and it's based in the U.S. and subject to search warrants. The free services is limited to one device, although you could just try to create new accounts for extra devices. But even free users can connect to any of the 1,000 or so VPN servers in 40-odd countries.
Jurisdiction – Gibraltar is territory that is controlled by the United Kingdom to some extent. Nonetheless, the internal affairs of the country are governed by itself. Censorship of certain websites is present in Gibraltar. As such, the jurisdiction of IVPN lies in a region with limited online freedom, but privacy in the region is still much better than in Europe.
Trusting a VPN is a hard choice, but IVPN's transparency goes a long way toward proving that its customers' privacy is a priority. Founder and CEO Nick Pestell answered all of our questions about the company's internal security, and even described the tools the company uses to limit and track access to secure servers. IVPN goes further than the other leading candidates we considered by being transparent about who runs the service and who is responsible for your privacy.
The service’s no logs policy means that it does not store user online activity data and promises not to release them unless required by law, ensuring that your information is in safe hands. What sets this service apart from others is its refund policy. Users are able to use it for up to 10 hours or 10GB of bandwith and still get a refund, a far more generous policy than what others have to offer.
Every service we tested accepts payment via credit card, PayPal, and Bitcoin. That’s plenty of options for most people, and you can always use a prepaid debit card if you don’t want your billing information tied to your VPN account. IVPN and OVPN are the only ones to accept cash payment through the mail, if you really don’t want to make a payment online. Private Internet Access and TorGuard accept gift cards from other companies—IVPN doesn’t, but that option isn’t worth the additional hassle for many people when other secure, private methods are available.
Windows being the widely used and the 82% market sharing OS, is one of the oldest and unluckily one of the highly vulnerable to cyber threats. Windows users! Get alert, Windows 10 security won’t protect you from tech-support scammers’ trickery and lies. The FBI reported that it received 11000 tech-support fraud complaints last year with losses totaling more than $15m from 80 countries. It’s high time to protect your cyber world with the best Windows VPN and protect yourself from scammers’ pop-up messages, phishing emails, bogus warnings about fraudulent bank charges or fake refunds, browser lockers, and other malpractices.
At $7.50/month and $58.49 for a year, they're obviously trying to move you towards their yearly program. We awarded the company points for Bitcoin support, and their money-back guarantee. We're a little disappointed that they only allow a 7-day trial, rather than a full 30-days. The company is generous, with five simultaneous connections. They also picked up points for their connection kill switch feature, a must for anyone serious about remaining anonymous while surfing. 
Of course that brings up another problem. Since there are so many services to choose from, how can you tell which ones are worth using? PCWorld has taken care of much of the legwork with its Best VPN services roundup. [Spoiler alert: It found Mullvad to be a great all-around VPN for its above-and-beyond commitment to user privacy, and NordVPN to be the current choice for watching U.S. Netflix from abroad.]

For features, they offer multi-hop VPN cascades, advanced firewall configuration options (DNS and IP leak protection), port forwarding, NeuroRouting, Socks5 and Squid proxies, obfuscation features to defeat VPN blocking (Stealth VPN), and a customizable TrackStop feature to block tracking, malware, advertising and social media domains. They also give you an unlimited number of device connections and offer full IPv6 support across their server network.

Beyond those two factors, it’s difficult to make blanket statements about what makes a trustworthy VPN. At the bare minimum, a good VPN provider should not collect and keep any logs of its customers’ browsing history. If it does, that puts your privacy at risk should someone access (or even release) those logs without authorization. But deciding when to a trust a logging policy isn’t easy. As the EFF points out, “Some VPNs with exemplary privacy policies could be run by devious people.” You don’t need to have done anything illegal to prefer that law enforcement and criminals alike not have access to a browsing history that may include your bank, medical websites, or that one thing you looked at around 2 a.m. that one time.
In this case, agencies see only the tunnel and not what is inside. They only get to view a single connection from a specific server and not who the user is, location or what is being downloaded or uploaded. VPN software also has the ability to provide agencies with user information or deny request for such. Such solution can be implemented as client and server software, hardware and software or on a subscription basis. There is also Secure Sockets Layer VPN, which enables remove users to connect by simply using a web browser.
Oh, heck no. A VPN can help make sure you're not snooped on when connecting between your computer and a website. But the website itself is quite capable of some serious privacy violations. For example, a VPN can't protect you against a website setting a tracking cookie that will tell other websites about you. A VPN can't protect you against a website recording information about products you're interested in. A VPN can't protect you against a website that sells your email address to list brokers. Yada, yada, yada.
Our VPN-issued IP address was never blacklisted by websites like those of Yelp and Target, but we were unable to access Netflix and BBC iPlayer while connected to TorGuard. No VPN offers a reliable way to access these streaming services, though: All of the VPNs we tried were blocked by Netflix, and of the four that could access BBC content on the first day, two were blocked the next.
Welcome to the CNET 2018 Directory of VPN providers. In this directory, we're taking a look at a few of the very best commercial VPN service providers on the Internet like CyberGhost, IPVanish, Buffered, Private Internet Access and others. Rather than looking at the wide range of free providers, which often have a lot of limits (and dubious loyalties), we are looking at those vendors who charge a few bucks a month, but put your interests first, rather than those of shadowy advertisers and sponsors. Our VPN rankings are based more than 20 factors including number of server locations, client software, dedicated and dynamic IP, bandwidth caps, security, logging, customer support and price. 
A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running across a VPN may therefore benefit from the functionality, security, and management of the private network.[1]

The service supports torrenting through its zero logs policy. It supports PPTP, Open VPN and L2TP connections, with each going up to 256 bits except for PPTP. To further increase security, IPVanish uses shared IPs, making it even more difficult to identify users. This also ensures that even the vendor could not furnish agencies with your information even if it wanted to.
Cost: There are two plans here; Premium and Gold, but only the latter supports VPN while the other is just their DNS service. UnoTelly Gold costs $7.95/month if you buy it every month, but there are three other options if you want to purchase it for three months, six months, or one year. Those prices, respectively, are $6.65/month, $6.16/month, and $4.93/month (each, of course, being paid for in one lump sum). You can try it free for eight days through this link.

The downsides to the free plan are that you'll see more ads, at least on the Android app, your choice of connections will be limited to Hotspot Shield's U.S. servers and you won't be able to get around geographic restrictions on Netflix, Hulu or BBC iPlayer. We were also a bit annoyed that the desktop software tries to hide the free plan when you launch it for the first time.
We used to advise people to do banking and other important business over their cellular connection when using a mobile device, since it is generally safer than connecting with a public Wi-Fi network. But even that isn't always a safe bet. Researchers have demonstrated how a portable cell tower, such as a femtocell, can be used for malicious ends. The attack hinges on jamming the LTE and 3G bands, which are secured with strong encryption, and forcing devices to connect with a phony tower over the less-secure 2G band. Because the attacker controls the fake tower, he can carry out a man-in-the-middle attack and see all the data passing over the cellular connection. Admittedly, this is an exotic attack, but it's far from impossible.
No one likes to wait for a video to load. We hate buffering! And no one wants to be restricted while a favorite show or movie is aired on streaming services like Netflix, HBO, Hulu and Pandora etc. A VPN is a solution, but frequent internet throttling kills the entertainment experience. With fastest VPN service you can enjoy and watch all your favorite content on notable channels and say goodbye to geo restrictions and lag. A fast VPN connection comes with added layers of security and anonymity that not only secure your internet journey but providing you unlimited bandwidth. Undoubtedly, this blend of great features makes a fastest VPN service worth a place in your PCs and mobile devices.
Nevertheless, the point of a VPN is to remain private and to have your internet activity kept as private as possible. For that reason, we’re choosing Mullvad as the best overall VPN (see our full review of Mullvad). The interface needs a lot of work, but the company does a great job at privacy. Mullvad doesn’t ask for your email address, and you can mail your payment in cash if you want to. Like many other VPNs, Mullvad has a no-logging policy and doesn’t even collect any identifying metadata from your usage.
Using a VPN, all data traffic is confined to a private, encrypted tunnel until they reach the public Internet. Destinations cannot be accessed until after the end of the VPN tunnel is reached. VPN services are quite useful in workplaces, especially for those who use mobile devices in accessing data from a work server. However, the most common use of VPN software is to remain anonymous to ISPs, websites or governments. This is true for users who download files illegally, such as in the case of copyrighted torrent files.
If the VPN server is behind a firewall, packet filters must be configured for both an Internet interface and a perimeter network interface. In this scenario, the firewall is connected to the Internet, and the VPN server is an intranet resource that is connected to the perimeter network. The VPN server has an interface on both the perimeter network and the Internet.
Authentication that occurs during the creation of a PPTP-based VPN connection uses the same authentication mechanisms as PPP connections, such as Extensible Authentication Protocol (EAP), Microsoft Challenge-Handshake Authentication Protocol (MS-CHAP), Microsoft Challenge-Handshake Authentication Protocol version 2 (MS-CHAP v2), CHAP, Shiva Password Authentication Protocol (SPAP), and Password Authentication Protocol (PAP). PPTP inherits encryption, compression, or both of PPP payloads from PPP. For PPTP connections, EAP-Transport Layer Security (EAP-TLS), MS-CHAP, or MS-CHAP v2 must be used for the PPP payloads to be encrypted using Microsoft Point-to-Point Encryption (MPPE).
The quality of customer support may be excellent but responses can be slow. It’s not the best option for China either. So while NordVPN falls a little short of ExpressVPN overall, on a two-year subscription, it works out a lot cheaper at $3.99 per month. So if you want to keep monthly costs down or only care about core performance, NordVPN is the ideal choice.
There are many things a VPN must do well to be useful, and one of the most important ones is to be fast. You can likely get around many other shortcomings. But if your VPN is slower than a dial-up modem (for those of us who remember them), there will be trouble ahead. Not only will you be less likely to use your VPN, but you will probably also curse it every time you do. It’s money well wasted.
Now coming back to the recommendation – I am a big fan of ExpressVPN as personally I have never encountered an issue while downloading torrent with this premium fast VPN connection. I download 2-3 torrent files every week, and for me the German and Florida server works like a charm. I only see a drop of 10% in speed compared to what I get without a VPN, which is a fair reduction.
When you connect to a VPN connection, a small drop in speed is bound to happen. Since the VPNs encrypt all the traffic, the drop in speed may be around 10 to 20% only. However, if you experience more than 20%, then you ought to look for a high-speed VPN connection. It is to understand that all vendors that claim to have a fastest VPN service sometimes fail to validate their service. There are many factors involved in VPN speed issues, which can be fine-tuned with small tweaks in the connection.
Access to Netflix and other streaming services is rock solid thanks to dedicated streaming servers. Torrenting/Kodi performance is equally good except on US servers, where P2P traffic is sadly banned. Download speeds on local connections are typically over 128Mbps and while they drop off on international servers, it’s always enough for HD streaming.
Compatibility – Device compatibility is something that has become more important with the passage of time. With an increased number of brands of computers and advances in mobile technology, virtually any software today should be compatible with various devices and operating systems. You should always make sure your VPN is compatible with your device before you make up your mind.
In this case, agencies see only the tunnel and not what is inside. They only get to view a single connection from a specific server and not who the user is, location or what is being downloaded or uploaded. VPN software also has the ability to provide agencies with user information or deny request for such. Such solution can be implemented as client and server software, hardware and software or on a subscription basis. There is also Secure Sockets Layer VPN, which enables remove users to connect by simply using a web browser.
There are several different VPN protocols, not all of which are used by all of the VPN services we reviewed. Most operating systems have built-in support for at least one of these protocols, which means you can use that protocol — and a willing VPN service — without client software. The full-fledged VPN services have online instructions for how to do this, as well as how to set up routers to connect directly to the services.

Although it has a no logs policy, the vendor collects user activity data and could opt to share them with third parties. The service can be used for torrenting but the company warns against copyright infringements. One weak spot is the service’s customer support. It has no live chat support and it takes more than 24 hours to get a reply. However, a knowledge base is available in the company’s website.
Likewise, if you're connecting via a nation's local carrier, that carrier may be intercepting your traffic, particularly if you're a non-native of that nation. In that situation, if you must connect back to applications and services at home, using a VPN is quite literally the least you can do. Also, keep in mind that if you use your phone's hotspot to connect your computer to the internet, you'll want to use a VPN on your computer as well.
A popular VPN service, TorGuard has servers in over 50 countries and enables users to unblock websites and get around censorship. This ensures that wherever you are in the world, there is bound to be a TorGuard server near you. By default, the service enables users to make five simultaneous connections. This lets users run the service on all their devices. To better protect users, the service has a kill switch. However, this feature is not available on mobile devices. Likewise, a Domain Name System leak protection works on Windows and OS X.
ExpressVPN is also one of the best VPN services available for streaming. Whether you are using a VPN with Kodi or streaming Netflix with a VPN, ExpressVPN offers great apps for streaming devices and high-speed bandwidth for HD videos. Their customer service is also top-notch, with 24/7 live chat support and a 30 day money-back guarantee with all subscription plans. [Learn more >]
StrongVPN is a great choice, as it meets the needs of both power users and casual users alike. Prices start at $10 a month and drop quickly, when you purchase a year of service at a time, to $5.83 a month. The ease of setup is fantastic–if you’re new to VPNs and/or don’t have extra time to fuss with manual settings, you can just download their setup app for Windows, OS X, iOS, and Android to automate the setup process. If you want a more granular control or need to manually configure devices like your router, you can follow one of their many guides for different operating systems and hardware to do it manually.
My recommendation, and the protocol I most often choose to use, is OpenVPN. OpenVPN is a non-proprietary, open-source implementation of a VPN communication layer protocol. It's well-understood, well-regarded, generally quite secure, and robust. In addition, it has the benefit of being able to communicate over port 443, which is the standard port for https communication, which means almost all firewalls will allow OpenVPN traffic -- and most won't even be able to detect that a VPN is being used.
How much should a VPN cost? Hotspot Shield can be as little as £119.99 for a lifetime or £5.99 a month if you'd rather sign up for a year. For your money you get a decent range of features including up to five devices, private browsing, virtual locations and good if not stellar performance: we did notice a slight increase in latency when Hotspot Shield was enabled, although it wasn’t too dramatic. There’s a seven-day trial that gives you more than enough time to put it through its paces.

Who thought that this lawsuit would be a good idea in the first place? It's google's software, be glad they are letting these companies use it free of charge (it's free from my understanding). If they were charging you to license it, I could get behind being able to customize it. That being said, I'd be really surprised if the contract these companies had to sign, or at least agree to, to use the software didn't include some legal jargon of, our stuff stays on, removing it is a violation of this agreement.
Logging Policy – This is a tricky subject. The record of PureVPN is not quite clear of controversy, as the company was involved in a case of handing over a particular user’s information to the FBI. However, the particular incident in question was an ethical conundrum, where human rights of a bullied individual were at stake. I can’t really condemn PureVPN for playing its part in helping agencies catch a suspect of reprehensible cybercrimes. In fact, PureVPN has responded admirably to the whole incident with a change in its policies to prevent similar ethical dilemmas in the future. The company probably doesn’t enjoy playing Aristotle and resolving convoluted ethical problems for its own sake as well as for its users’.
Even though Tor is free, we don’t think it’s the best option for most people. If you aren’t familiar with Tor, this handy interactive graphic shows how it protects an Internet connection, and this series goes into more detail about how Tor works. Runa Sandvik, a former researcher with The Tor Project who is now part of the information security team at The New York Times (parent company of Wirecutter), described it as “a tool that allows users to remain anonymous and uncensored.” When we asked expert Alec Muffett about whether he personally used a VPN, he told us he actually spent most of his work time using Tor. But Tor has a reputation for slow connections, can be blocked by some websites, and isn’t suitable for some peer-to-peer applications like BitTorrent.
A virtual link is a logical point-to-point connection between an ABR of an area and an ABR that is physically connected to the backbone area. For example, a virtual link is configured between the ABR of Area 2 and the ABR of Area 1. The ABR of Area 1 is physically connected to the backbone area. Area 1 is known as the transit area, the area across which the virtual link is created in order to logically connect Area 2 to the backbone.

IVPN doesn’t have as many server locations as larger services like ExpressVPN do. When we initially recommended the service, IVPN was limited to 13 countries, compared with ExpressVPN’s 94. But in the months since, IVPN has doubled that to 26, including two additional locations in Asia (Tokyo and Singapore). We’ve yet to test the new servers though, and in the past, IVPN’s single location in Asia—Hong Kong—was slower than competitors.
So our advice is to not use a free VPN unless it really is for occasional, very casual use. For the odd IP-hopping use case, they can work. But if you're planning on using the VPN a lot and for streaming video etc we'd highly recommend going for one of the overall best VPN services - they're not free but they're also pretty cheap in the grand scheme of things.
If you need a more affordable VPN than our top pick and don’t have an Apple device—or if you need ChromeOS support—we recommend TorGuard. Its apps aren’t as simple or user-friendly, but TorGuard is a good option for more tech-savvy people or those willing to spend a little more time fiddling with an app. TorGuard’s CEO has built trust by talking with media outlets (including us) and detailing the company’s commitment to a service built around a lack of activity logs. Though the apps aren’t as easy to use as our top pick, the connections were the fastest of any we tested and the company has more than twice as many server locations.
We tested each service using both the Netflix-operated Fast.com download speed test and the more comprehensive Internet Health Test; the latter measures speeds up and down through multiple interconnection points between Internet providers. We ran each test on the macOS version of each VPN software in its default configuration, with our test computer connected over Gigabit Ethernet to a cable modem with no other traffic running through it. We recorded baseline download rates without a VPN active of nearly 300 mbps, and we checked our non-VPN speeds at random intervals to ensure that our local ISP wasn’t affecting the tests.
As the size of the link state database increases, memory requirements and route computation times increase. To address this scaling problem, OSPF divides the network into areas (collections of contiguous networks) that are connected to each other through a backbone area. Each router only keeps a link state database for those areas that are connected to the router. Area border routers (ABRs) connect the backbone area to other areas.
VPN services offer up different "gateway" cities, allowing you to choose where the IP address assigned to your computer is located. This allows you to access websites typically only available to users from that country. It also allows you to access websites that may blocked/censored in your own country. This application is particularly important for travelers who need to access websites from their home country, as well as for people living in regions rife with Internet censorship, such as China and Iran.
Some countries don't have the same protections for freedom of press, speech, and expression that most democratic countries have. In fact, some regimes resort to oppressive measures to monitor and take action against those they see as threats to the government. People who dare to stand up have to take extra precautions to protect their communications. Journalists and researchers also send messages containing data that some people may want to try very hard to intercept.
Google’s Android is the largest installed base with over 73% market share and more than a billion daily active users – so it’s no surprise that there are a large number of VPN apps that support the OS. Surprisingly the Android is one of the most vulnerable OS with 343 new malware samples used to found every hour last year; the number could have progressed. Hold your breath guys! There are 700,000 malicious apps on your Google Play Store and there’s a possibility that you’re using one of them.
We spent more than 130 hours researching 32 VPN services, testing 12, interviewing the leadership of five, and consulting information security and legal experts. We found that a VPN shouldn’t be your first step toward online security, but for protecting your info on public Wi-Fi (and in some other cases), IVPN is the most trustworthy provider that offers fast, secure connections and easy setup.
VPNs, or Virtual Private Networks, are a quick and easy solution to making your computer appear to be coming from a different location. They accomplish this by creating a virtual network that routes all of your PC or smartphone’s network traffic through an encrypted tunnel and out the other side, making it seem to the world that you’re actually in whatever location the VPN server is located. This can help you bypass geographic restrictions, avoid censors, or keep you (relatively) anonymous online.
Aside from providing an exceptional VPN server for encrypting traffic, Speedify leverages all types of available internet connection to increase bandwidth, bolster internet speeds, and lower latency. This results in a smooth and reliable connection on any platform, whether using mobile devices or a desktop. This is achieved through its Channel Bonding functionality that combines all types of internet connections, including WiFI, VPN, 3G, and, 4G.
VPN services can also be defined as connections between specific computers, typically servers in separate data centers, when security requirements for their exchanges exceed what the enterprise network can deliver. Increasingly, enterprises also use VPN connections in either remote access mode or site-to-site mode to connect -- or connect to -- resources in a public infrastructure-as-a-service environment.
TrackStop – Ads are basically advanced tracking to record your browsing, so you can be hit with targeted ads based on your online activity. To protect users against this threat, Perfect Privacy developed TrackStop, which is a powerful filter that blocks advertising, tracking, and malicious domains at the VPN server level. It ranked the best among different VPN ad blockers I tested.

If VPN connections get blocked by your network because of strict network management or government censorship, TorGuard offers a “stealth” connection to avoid deep packet inspection. Specifically, TorGuard uses Stunnel (a clever portmanteau of SSL and tunnel) to add an extra layer of encryption and make your traffic look like normal, secure Web traffic. If you’re having connection issues, you can enable Stunnel with a checkbox on the main application window, but only if you select TCP from the protocol list. (Otherwise, the box is unclickable, with no explanation as to why.)

It usually relies on either Internet Protocol Security (IPsec) or Secure Sockets Layer (SSL) to secure the connection. However, SSL VPNs can also be used to supply secure access to a single application, rather than an entire internal network. Some VPNs also provide Layer 2 access to the target network; these will require a tunneling protocol like PPTP (Point-to-Point Tunneling Protocol) or L2TP (Layer 2 Tunneling Protocol) running across the base IPsec connection.
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