The Remote Authentication Dial-In User Service (RADIUS) protocol is used to provide centralized administration of authentication, authorization, and accounting (AAA) and an industry-standard security infrastructure. RADIUS is defined in RFCs 2138 and 2139 in the IETF RFC Database. RADIUS enables administrators to manage a set of authorization policies, accumulate accounting information, and access an account database from a central location.
Server switching is a feature -- offered by most VPN service providers -- that allows you to change what region or country you're going to connect to. Most providers allow you to switch as often as you'd like (although you usually have to disconnect, then change your configuration, and reconnect). This may be useful if you're trying to hide your location, or if you're running into some communications glitches on the server you're currently using.
Latency: This is closely tied to proximity, but is also affected by the amount of traffic on the networks between you and the VPN server. Latency measures the time it takes to send and receive a request from a server, also called ping time. Many VPN apps will allow you to see which server offer the least latency, usually measured in milliseconds. If not, you can connect to the server and use a terminal or command prompt to ping a website and view the time.
Some VPN services provide a free trial, so take advantage of it. Make sure you are happy with what you signed up for, and take advantage of money-back guarantees if you're not. This is actually why we also recommend starting out with a short-term subscription—a week or a month—to really make sure you are happy. KeepSolid VPN Unlimited offers a one-week Vacation subscription, for example. Yes, you may get a discount by signing up for a year, but that's more money at stake should you realize the service doesn't meet your performance needs.
Their best plan is 1-year subscription plan: $6.99 ($83.88). While their monthly price of $11.95 is at the high end of the spectrum (and they did lose a few points for that), their yearly price of $83.88 is lower than most our contenders. And yes, they also have a full 30-day refund policy. NordVPN also offers a dedicated IP option, for those looking for a different level of VPN connection. They do offer $3.99/month price ($95.75/2-year) .
PPTP is undoubtedly one of the fastest VPN protocols that are pre-installed in major operating systems and consoles. The only downside of PPTP protocol is its low encryption method that is a prime concern of VPN users who take serious notes on privacy. It supports 128-bit encryption that is somewhat less secure than other VPN protocols. However, if your goal is to use VPN for streaming then using PPTP is a way to go. PPTP protocol is also considered as the fastest VPN protocol because it is very easy to setup, and you can get high-speed VPN connection in just a few clicks and taps.
The concept of online streaming has taken the digital world to the seventh sky; now you don’t need to travel to the stadium to support your favorite team, it’s all possible within reach of few clicks. Even streaming content in other countries also become a lot easier using one of the best VPN services; streaming Netflix US is just a click away, no matter where you’re. The next thought might come which VPN is useful for streaming? Apparently one of the fastest VPN services would do wonders.
If you don’t mind doing a little extra tinkering in a more complicated app to save some money, we recommend TorGuard because it’s trustworthy, secure, and fast. TorGuard is well-regarded in trust and transparency; it was also the fastest service we tried despite being less expensive than much of the competition, and its server network spans more than 50 locations, more than twice as many as our top pick. But TorGuard’s apps aren’t as easy to use as IVPN’s: TorGuard includes settings and labels that allow extra flexibility but clutter the experience for anyone new to VPNs. And unlike IVPN, TorGuard doesn’t natively support OpenVPN connections on iOS, making it a significantly worse choice on Apple devices than it is if you use Windows, ChromeOS, or Android.
Some combination of the above. Odds are, even if you’re not one of these people more often than not, you’re some mix of them depending on what you’re doing. In all of these cases, a VPN service can be helpful, whether it’s just a matter of protecting yourself when you’re out and about, whether you handle sensitive data for your job and don’t want to get fired, or you’re just covering your own ass from the MPAA.
All VPNs have to do some kind of logging, but there are VPNs that collect as little data as possible and others that aren’t so minimalist. On top of that, some services discard their logs in a matter of hours or days while other companies hold onto them for months at a time. How much privacy you expect from your VPN-based browsing will greatly influence how long you can stand having your provider maintain your activity logs—and what those logs contain.

Thankfully, there's a workaround for this problem. Instead of using the VPN app from the company from which you've purchased a subscription, you can download the standalone OpenVPN app. Open it, and you can enter your subscription information from the VPN company you've decided to work with. The OpenVPN app will then connect to the VPN company's servers using our preferred protocol.
Fortunately, there are some brave companies that are still trying to stay one step ahead of Netflix’s VPN catchers. Currently, Windscribe Pro is our top choice. The service delivers good speeds on its U.S. servers, and has a very simple approach to Netflix: Just select the “Windflix” connection from the desktop app or browser extension and you’re good to go. Windflix is still technically in beta, but it works well and there’s even a Windflix U.K. option if you’d like to experience Netflix from the other side of the pond.
Logging Policy – The logging policy of VyprVPN, in spite of its claims of being committed to user secrecy, is in fact not entirely ideal. This is because it keeps connection logs of users for the purported reason of troubleshooting and diagnostic purposes. However, this doesn’t seem like a convincing rationale. VyprVPN should consider revising its privacy policy and move towards the zero-logging model that many reputed competitors are following.
While everything makes sense and all is good, what were the speed test results for China? Sorry for being so upfront but I have gone through a dozen or so websites to find a vpn that works in china. I have an upcoming business trip to china and a vpn would be really handy. But with complicated cyber laws in china, its hard to put a finger on anyone service. I used a free vpn service, like zenmate, when I was in Germany and it worked perfectly. What would you advise, which service is best for china? Also, can I purchase the service once I am in China or should I buy it before? Pls reply!
TorGuard’s signup and payment process is also fine but not stellar. Compared with that of IVPN, the checkout process is clunky, and using a credit or debit card requires entering more personal information than with our top pick. The easiest option for anonymous payments is a prepaid debit card bought locally. Otherwise, like most providers, TorGuard accepts a variety of cryptocurrencies, PayPal, and foreign payments through Paymentwall. That last service also allows you to submit payment through gift cards from other major retailers. We don’t think this method is worth the hassle for most people, but if you have some money on a fast-food gift card you don’t want, turning it into a VPN service is a nice option.
Well, yes, it does. How? Because of the data encryption and server proximity. It’s always advisable to connect to a VPN server through the automatic server selection option that your VPN software has. Normally, it chooses the fastest VPN server near to you to give you better speed and a fast VPN connection. So, suppose if you have a 50 MB internet package when connected to a VPN server, you might face a little speed reduction of about 5-10 MB depending on the VPN server location and your own geographical location.
When you download a file from a server without a VPN, there’s a chance you will encounter network congestion, most likely on your nearby ISP network or at the download server itself. When you use a VPN service, you add a third potential bottleneck to the route. Whether because of server load or congestion on the network surrounding the server, there’s a higher chance that your speed will be affected while connected to a VPN.
Servers – It is a bad idea to talk about the number of servers under NordVPN at any given point in time. This is because NordVPN’s server list is like my problems: they just never stop increasing! Currently, it is offering more than 4,700 servers, but don’t blame me if it adds a hundred more by the next day. There is no other VPN with a server network as large as NordVPN. As such, NordVPN comfortably ranks higher above all other VPNs when it comes to servers.
A remote-access VPN uses public infrastructure like the internet to provide remote users secure access to their network. This is particularly important for organizations and their corporate networks. It's crucial when employees connect to a public hotspot and use the internet for sending work-related emails. A VPN client, on the user's computer or mobile device connects to a VPN gateway on the company's network. This gateway will typically require the device to authenticate its identity. It will then create a network link back to the device that allows it to reach internal network resources such as file servers, printers and intranets, as if it were on the same local network.
Privacy features – The privacy features you want/need really varies for each person and depends on your threat model. For a higher level of online anonymity, you could use a multi-hop VPN, or possibly chain different VPN providers together. This could be done by using one VPN on a router, and then connecting through a second VPN on your computer. This can also be accomplished using virtual machines.
Insist on a VPN that has Kill Switch protection. There is a security vulnerability that can reveal your private information if your VPN connection is lost, even just for a few seconds. The solution is to be sure that you’re protected by a Kill Switch. A Kill Switch stops all data from being sent to the internet until a secure VPN connection has been re-established. If your VPN software does not have a Kill Switch, your computer might be leaking your private information without your knowledge
They even offer the most generous simultaneous connection count, with six simultaneous connections through their network, where everyone else offers five or fewer. NordVPN's network isn't as large as some of their competitors, so if you're trying to obfuscate your tracks, you might want a company with more servers. Otherwise, this company is clearly providing a winning offering.
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.
In addition, in a spoke and hub frame relay topology, the frame relay interface for the hub router must have a router priority set to 1 or greater and the frame relay interfaces for the spoke routers must have a router priority set to 0. Otherwise, the hub router, which is the only router that can communicate with all of the spoke routers, cannot become the designated router and adjacencies cannot form across the frame relay network.
Final Verdict – VyprVPN offers reasonably good security features with its NAT firewall and AES 256 encryption. At the same time, however, it lacks in a few departments such as server size, speed, and privacy policy. It works fairly well for going over firewalls preventing users from accessing blocked websites. Nonetheless, for purposes such as streaming and torrenting, there are better alternatives available.

VyprVPN allows you to quickly access over 200,000 IP addresses with 700+ servers in 70+ worldwide locations in North America, South America, Europe, Asia, Africa and Oceania. Connections are always available, so you can access your favorite websites quickly. With Golden Frog's fast VPN service, you can restore your freedom and bypass location-based IP blocking imposed by restrictive governments. We don't believe in limitations, so you can connect to any VyprVPN server at any time, without restrictions or download caps.
Mobile VPNs are designed and optimized to ensure a seamless user experience when devices are switching networks or moving out of coverage. It generally has a smaller memory footprint, and because of that, it also requires less processing power than a traditional VPN. Therefore, it enables your applications to run faster while the battery pack is able to last longer.

When instructed, a demand-dial interface that is configured for auto-static updates sends a request across an active connection to request all of the routes of the router on the other side of the connection. In response to the request, all of the routes of the requested router are automatically entered as static routes in the routing table of the requesting router. The static routes are persistent: They are kept in the routing table even if the interface becomes disconnected or the router is restarted. An auto-static update is a one-time, one-way exchange of routing information.

Virtual desktop infrastructure (VDI) is a virtualization technology that empowers you to operate desktop operating systems in virtual machines existing on servers in place and being managed in a data center. By managing the desktops centrally, your company obtains control of your data security. This also means fixing is only required in a sole system…
The solution is also able to bypass firewalls through stealth connections. Additional security is provided through an ad and malware blocker, which can be switched on and off. For those who enjoy torrenting, the software supports such process, with certain servers optimized for P2P networks. This is designed to keep high-speed browsing on other connections. However, the service warns users to keep torrenting activities confined to specific cities around the world.

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.

Avast SecureLine and Avira Phantom VPN are run by antivirus companies as complements to their primary businesses. These services are also limited to Windows, Mac, iOS and Android and don't work without client software. But they offer few features, have a couple of dozen servers at most and don't let you pay anonymously. However, the companies are known quantities, and the services are handy for occasional travelers.

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.

NordVPN, for example, has well over 4,800 servers across the globe. If you live in the US, you're likely to find a nicely uncrowded server close by. The ubiquity of its servers also means you're likely to find a server nearby no matter where you travel. Private Internet Access and TorGuard are notable for being the only VPNs we've yet reviewed that have more than 3,000 servers.

PrivateVPN is one of our top picks for providers that offer both robust privacy features and excellent global performance. It is also one of the cheapest options on the current market if you opt for the annual plan. If you’re looking for seriously fast speeds and super-easy access to a range of streaming services including Netflix and BBC iPlayer, look no further. Fantastic upload speeds on local connections combined with low latency make it a great option for torrenters, keen Kodi users and gamers alike.
In recent times, VPN services have made giant leaps in growing from niche online products hidden away in a dark corner of the internet to almost must-have services for anyone with an internet connected device. VPN is very much in the mainstream now and luckily that broadened appeal has done wonders for the usability of the services themselves - there are some brilliant options available in 2018.
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.
Avast SecureLine and Avira Phantom VPN are run by antivirus companies as complements to their primary businesses. These services are also limited to Windows, Mac, iOS and Android and don't work without client software. But they offer few features, have a couple of dozen servers at most and don't let you pay anonymously. However, the companies are known quantities, and the services are handy for occasional travelers.
The service uses Advanced Encryption Standard with a 256-bit key, a common method employed by VPN services. Connections are protected using 2048-bit public key encryption. For privacy, the service offers a malware detection software. What is good about the software is that it can be downloaded and used without providing any personal information. This holds as long as you use the free version of the software and never contact customer support.
Though TorGuard’s support site offers in-depth information, finding specific info is harder, and the site is not as easy to follow as those for our top pick or ExpressVPN. TorGuard provides helpful video tutorials, but they’re two years old now and don’t show the latest versions of the company’s apps. As with most of the VPNs we contacted, TorGuard support staff responded to our help ticket quickly—the response to our query came less than half an hour after we submitted it on a weekday afternoon. Still, if you’re worried about getting lost in VPN settings or don’t like hunting for your own answers, IVPN is a better fit.

Each of these VPN scenarios can be deployed to provide connectivity over a public network, such as the Internet, or over a private intranet. VPN connections can also be deployed in an extranet scenario to communicate securely with business partners. An extranet functions as an intranet that can be securely shared with a designated business partner.
Insist on a VPN that has Kill Switch protection. There is a security vulnerability that can reveal your private information if your VPN connection is lost, even just for a few seconds. The solution is to be sure that you’re protected by a Kill Switch. A Kill Switch stops all data from being sent to the internet until a secure VPN connection has been re-established. If your VPN software does not have a Kill Switch, your computer might be leaking your private information without your knowledge
We’ve shown you how to roll your own VPN using Hamachi, and even how to set up Privoxy to secure your web browsing once you have your personal VPN set up. Hamachi isn’t the only option: you can also download and configure OpenVPN (a free SSL VPN) on your own home server,, or if you have a router that supports it, enable OpenVPN on your home router so you can connect back to it when you’re abroad. Combined with Privoxy, you get the privacy and anonymity benefits of a VPN without spending a dime.

The IVPN app's default settings are great for most people, who should be happy just smashing the Connect button and not fiddling with settings. On a desktop or an Android device, the company supports only the OpenVPN protocol we recommend and uses AES 256-bit encryption (what we consider the standard at this point). Our budget pick, TorGuard, defaults to the weaker (but also acceptable) AES 128-bit encryption unless you manually change it.
The Remote Authentication Dial-In User Service (RADIUS) protocol is used to provide centralized administration of authentication, authorization, and accounting (AAA) and an industry-standard security infrastructure. RADIUS is defined in RFCs 2138 and 2139 in the IETF RFC Database. RADIUS enables administrators to manage a set of authorization policies, accumulate accounting information, and access an account database from a central location.

We'll go into greater explanation about these three metrics and how we collect them below. But choosing which is most important is tricky. Mostly, it depends on how you're using your internet connection. We assume that most people reading are major consumers of content. Reading the news, streaming movies, using BitTorrent, or listening to music on the web all require that your device pull down data more or less continuously. With that in mind, we've settled on download speeds as the most important benchmark.

L2TP/IPsec (Layer 2 Tunneling Protocol with Internet Protocol Security): L2TP is not secure itself, so it's generally paired with the IPsec secure-networking standard. The combination of the two was once thought to be very secure when properly implemented, but some VPN services suggest that you use OpenVPN instead. L2TP/IPsec has native support in Windows, OS X/macOS, Android, Chrome OS and iOS. Most VPN services support it.


Without a VPN, your connection is fully open. Your ISP, employer, the Wi-Fi router in the coffee shop mentioned above, any server along the way, or a person with the right tools can look at your data, log it and use it in ways you can’t control. Government agencies can monitor your online activity and share the retained metadata with each other, including across country borders through intelligence alliances such as “14 Eyes.” Based on your IP address, which depends on your geographic location, third-party sites and services may charge different prices or display intrusive targeted advertising.
You heard us right on that last bit: a number of VPN providers have systems in place where they will accept gift cards from major retailers (that are totally unrelated to their business) like Wal-Mart or Target in exchange for VPN credit. You could buy a gift card to any number of big box stores using cash, redeem it for VPN credit, and avoid using your personal credit card or checking information.
Using a VPN is a little trickier for ChromeOS users, however. While Google has worked to make it easier to use a VPN with a Chromebook or Chromebox, it's not always a walk in the park. Our guide to how to set up a VPN on a Chromebook can make the task a bit easier, however. In these cases, you might find it easier to install a VPN plug-in for the Chrome browser. This will only secure some of your traffic, but it's better than nothing.
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