CHAP is an improvement over PAP because the clear-text password is not sent over the link. Instead, the password is used to create a hash from the original challenge. The server knows the client’s clear-text password and can, therefore, replicate the operation and compare the result to the password sent in the client’s response. CHAP protects against replay attacks by using an arbitrary challenge string for each authentication attempt. CHAP protects against remote-client impersonation by unpredictably sending repeated challenges to the remote client throughout the duration of the connection.
In the configuration shown in the following figure, the firewall is connected to the Internet and the VPN server is another intranet resource connected to the perimeter network, also known as a screened subnet or demilitarized zone (DMZ). The perimeter network is an IP network segment that typically contains resources available to Internet users such as Web servers and FTP servers. The VPN server has an interface on the perimeter network and an interface on the intranet.
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.
ExpressVPN outranks quite a many VPN providers as it is well known for its overall remarkable performance. ExpressVPN speed is its unique selling proposition and it has one of the fastest VPN networks in the world. It comes handy both in delivering top speed and military-grade security. Having a wide range of servers located in 87 countries, ExpressVPN has this added advantage over its competitors. Although they don’t offer VPN free trial, their 30-day money back guarantee is superlative to all. It gives you enough time to use ExpressVPN for varied uses, hence to get satisfied with the performance. It also offers attractive features like the Zero-logging policy, unmetered bandwidth, multi logins, and unlimited switches that are considered as bliss for any VPN user. Below is the VPN speed test result for ExpressVPN, with and without a VPN connection. Read our complete ExpressVPN review here.
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 >]
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. 

Android Pie, the 9th revision of the most popular mobile operating system on earth, is now available on Google’s Pixel phones starting Monday. Goole initially announced Android P, the previous name of Android Pie, in March, then at Google I/O conference in May they demoed some really cool features of the next version of Android. People who signed up for the Android Beta program, which lets you try out pre-released versions of the software, will receive the update by the “end of this fall,” if they have devices from Sony Mobile, Xiaomi, HMD Global, Oppo, Vivo, OnePlus and Essential.


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.


Credit: Opera VPNAlso, although your data is encrypted as it travels between you and the far-off VPN server, it won't necessarily be encrypted once it leaves the VPN server to get to its final destination. If the data isn't encrypted — and that depends on the website you're connecting to — then the traffic might be intercepted and read. (One well-known VPN provider was recently accused of inserting ads in users' web browsers, which would violate users' security and privacy.)
Not all the VPN protocols work fast. It is not that VPN doesn’t work fast, but all the protocols are designed to fulfill specific needs of the users. We have already discussed the fastest VPN protocols used in our VPN speed test. We are now detailing more features about each protocol to give you more reasons to choose the best one that fits your specific needs.
Shout out to you ReviewsDir. really doing a fantastic job. Even responding to what people have to say. Definitely a site and a post to recommend! I haven’t tried HMA orr HSS paid. In paid subs, I’ve only used Ivacy and Nord and the experience was pretty decent in both cases (I mainly use them for browsing and casual downloading). Guess the associated costs are justified.
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.

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.
If you’re looking for something free, look no further. If StrongVPN and SurfEasy are like like a solid mid-class sedan, TunnelBear is more like the econo-car (if you buy a TunnelBear subscription) or the city bus (if you use their generous free program). That’s not a knock on TunnelBear, either–they’ve been around for years and their free service tier has been of great utility to people in need all over the world.
IVPN goes further than the other leading candidates we considered by being transparent about who runs the service and is responsible for your privacy. The company lists its core team on its website, and its small team has an online presence on a variety of platforms. In contrast, only one employee at ExpressVPN has a public face: VP of marketing Harold Li gave us detailed answers to questions about policies and internal security, but couldn’t tell us much about who else worked there. (We discuss ExpressVPN in more detail in the Competition section—that company was almost our top pick but for this issue.)

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.
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.

However, you've got no choice but to run TunnelBear's client software (unless you use Linux), which may concern some privacy-minded users, and there's no option to set up TunnelBear connections on routers or other devices. Last but not least, this tiny Canadian firm is now owned by U.S. antivirus giant McAfee, which may mean TunnelBear is subject to U.S. search warrants.
VPN uses robust protocols to safeguard netizens’ activity from snoopers and hackers with the help of military-grade encryption packets which causes a slight, or sometimes a visible reduction in your Internet speed. But does that mean using a VPN will compromise your connection speed? Not necessary! Though the speed of a VPN always depends on individuals’ usage, it can be an essential element to help you decide which one to buy. That is where your search for the fastest VPN service or high-speed VPNs starts. However, you need to be selective while choosing a fast VPN as it involves various factors that influence the speed of the connection.
The Center for Democracy & Technology brought just such a complaint against one VPN provider last year, though no enforcement action has been announced. Many privacy sites suggest finding a VPN service outside the prying eyes of US intelligence agencies and their allies, but FTC protections could be an argument for finding one in the US so that there’s a penalty if it deceives its customers.

Final Verdict – IPVanish is a decent VPN service with one of the most appealing user-interfaces. It is fast, both in connecting to servers and during actual Internet activity. It uses the modern AES 256 bit encryption and provides up to 10 multiple logins. However, it does not work with Netflix and is not a recommended VPN for torrenting. For everything else, it is a great VPN service. You can get a detailed view in our IPVanish review.
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.

Multi-hop cascades + NeuroRouting – Perfect Privacy’s apps give you the ability to create multi-hop VPN cascades across up to four different servers in the network. This protects you against the possibility of a rogue data center logging traffic, targeted monitoring, and other threat scenarios. Additionally, the NeuroRouting feature takes this concept further by dynamically routing all traffic through multiple hops in the server network, corresponding to the location of the site you’re visiting. (No other VPN offers this.)
Given the aggressive pricing and marketing of other services that don’t measure up to our picks, IVPN’s most obvious downside may look like its price: At the time of this writing, the regular price for an annual IVPN subscription is $100 (about $8 per month). Promotions regularly bringing that down to $70 to $80 per year, but some services have regular pricing of half that. But you shouldn’t pay for a VPN you can’t trust, or one so slow or confusing that you avoid using it at all. We think IVPN’s combination of trust, security, and performance is worth the price. But if it’s too expensive for your needs, consider our budget pick instead.
Beyond the CNET directory, it's always good practice to search "the Google" for a company or product name and read the user reviews. If you see a huge number of old complaints or new complaints suddenly start showing up, it might be that there's been a change of management or policies. When I'm looking for a service, I always base my decision partially on professional reviews and partially based on the tone of user reviews.

One of the most popular VPN software out in the market today, NordVPN has over 550 servers in 49 different countries. These servers aid users in different needs, which include encryption of both incoming and outgoing data, sending all traffic through a Tor network to safeguard user anonymity and protection against DoS attacks, which are usually done by malignant hackers.
One of the most important factors when you’re choosing a VPN provider is also the hardest to quantify: trust. All your Internet activity will flow through this company’s servers, so you have to trust that company more than the network you’re trying to secure, be it a local coffee shop’s Wi-Fi, your campus Internet connection, your corporate IT network, or your home ISP. In all our research, we came across a lot of gray areas when it came to trusting a VPN, and only two hard rules: Know who you’re trusting, and remember that security isn’t free.
Once you switch on AVG Secure VPN and connect your Windows device to the internet you’re instantly protected. How? Well, when you connect our VPN software for Windows we give you one of our IP address instead of your own (your IP is the unique code that identifies your device). Which means if anyone comes snooping they can only see our server address. Pair that with military grade encryption levels of 256 bit AES standards and there you have it. Instant online privacy at the click of a button. VPN. It’s as easy as 123. Simply switch on our VPN software for Android and connect your device to the internet. We’ll then connect you to one of our worldwide servers (you can even choose where you want to appear) and bingo – you’ll have an instant 256bit AES encrypted internet connection. That’s the same strength used by governments and banks to secure their data. Which means you can surf the web using VPN for Android securely and privately. VPN. It’s as easy as 123. Simply switch on our VPN software for Android and connect your device to the internet. We’ll then connect you to one of our worldwide servers (you can even choose where you want to appear) and bingo – you’ll have an instant 256bit AES encrypted internet connection. That’s the same strength used by governments and banks to secure their data. Which means you can surf the web using VPN for Android securely and privately. Internet privacy at the click of a button? We’ve got you. Once you switch on our VPN software for iPhone your internet connection becomes encrypted instantly. And not just any old encryption, we’re talking 256bit AES encryption levels – the same standards used by banks and governments. You can then choose to appear anywhere in the world with one of our global servers which makes censorship and content blocks a thing of the past. Welcome to internet freedom with VPN for iPhone. Once you hit that VPN button on your Mac AVG Secure VPN connects you to one of our worldwide servers and instead of using your own IP address (think of it as a unique zip code for your device) we’ll give you one of ours. Team that with our 256bit AES encryption levels (yep the same ones used by governments and banks) and our VPN software for Mac ensures you become instantly anonymous and secure online. VPN - easy as 123.
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.

The world wide web is a massive place that allows you to connect with people from all over the world. Unfortunately, there are people out there who use valuable technology to steal information and use it for their own profit. Fortunately, we can help with our free VPN service. Don’t remain vulnerable to any potential attacks from thieves. Our services are fast, reliable, and free to use.
Every user is going to have slightly different VPN needs, and the best way to pick the ideal VPN service is to take careful stock of what your needs are before you go shopping. You may even find you don’t need to go shopping because home-grown or router-based solutions you already have are a perfect fit. Let’s run through a series of questions you should ask yourself and highlight how different VPN features meet the needs highlighted by those questions.
The VPN server provides a routed connection to the network to which the VPN server is attached. On a site-to-site VPN connection, the packets sent from either router across the VPN connection typically do not originate at the routers. The calling router (the VPN client) authenticates itself to the answering router (the VPN server), and, for mutual authentication, the answering router authenticates itself to the calling router.
The initial PPP payload is encrypted and encapsulated with a PPP header to create a PPP frame. The PPP frame is then encapsulated with a modified GRE header. GRE is described in RFC 1701 and RFC 1702 in the IETF RFC Database and was designed to provide a simple, general purpose mechanism for encapsulating data sent over IP networks. GRE is a client protocol of IP using IP protocol 47.
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).
However, VPN speed is significantly influenced by a variety of factors including your Internet connection, VPN protocol you choose, and the device you are connected to. All these major factors result in speed undulation and interruptions while you connect a VPN on your PC or mobile device. However, with a few optimization techniques, you can turn your VPN into a fast VPN connection in less than 60 seconds. We will discuss this later how you can optimize your VPN connection for optimum speed. But first let see how we have analyzed VPN services to picked the fastest VPN.
Let's start with the basic idea of internet communication. Suppose you're at your desk and you want to access a website like ZDNet. To do this, your computer initiates a request by sending some packets. If you're in an office, those packets often travel through switches and routers on your LAN before they are transferred to the public internet through a router.
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.
IP / DNS leak test – PureVPN’s security mechanisms are based on the AES 256 bit encryption. This is the modern industry-standard of encryption that every VPN worth buying uses. Together with this mode of encryption and PureVPN’s DNS protection features, the possibility of IP or DNS leaks is all but completely ruled out. With security becoming a matter of utmost importance for users all over the world, PureVPN delivers just the right combination of speed and security for the users’ peace of mind.
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).

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.


An impressive and fast VPN service, Buffered VPN offers total online security and world-class customer support. The service boasts of providing access to content from any country in the world. This is achieved through the service’s server locations in 45 countries. It supports Windows, Linux and Mac platforms, but can also be set up on Android and iOS. The service offers excellent latencies and fast upload speeds, very good for browsing.


In short, latency is a time between a request sends and the response receives; it’s often called ping time. Factor that affects latency includes; the distance your request travels. It’s important when playing video games with a VPN, lower the latency, more responsive the experience will, with less lag. Download and upload speeds measure the amount of data is moved over your internet connection. These are measured in Megabits per second (Mbps); it shows the data runs through a network in a given frame of time. The more, the better. Simple.
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There was a time when using a VPN required users to know about the built-in VPN client for Windows or universal open-source solutions such as OpenVPN. Nowadays, however, nearly every VPN provider has its own one-click client that gets you up and running in seconds. There are usually mobile apps as well to keep your Android or iOS device secure over public Wi-Fi.
Second, what are the acceptable terms of use for your VPN provider? Thanks to the popularity of VPNs with torrent users, permissible activity on specific VPNs can vary. Some companies disallow torrents completely, some are totally fine with them, while others won’t stop torrents but officially disallow them. We aren’t here to advise pirates, but anyone looking to use a VPN should understand what is and is not okay to do on their provider’s network.

We're not cryptography experts, so we can't verify all of the encryption claims providers make. Instead, we focus on the features provided. Bonus features like ad blocking, firewalls, and kill switches that disconnect you from the web if your VPN connection drops, go a long way toward keeping you safe. We also prefer providers that support OpenVPN, since it's a standard that's known for its speed and reliability. It's also, as the name implies, open source, meaning it benefits from many developers' eyes looking for potential problems.
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