Proxyservers
What Is A Proxy Server? | PCMag
A proxy server is a computer system or router that functions as a relay between client and server. It helps prevent an attacker from invading a private network and is one of several tools used to build a firewall.
The word proxy means “to act on behalf of another, ” and a proxy server acts on behalf of the user. All requests to the Internet go to the proxy server first, which evaluates the request and forwards it to the Internet. Likewise, responses come back to the proxy server and then to the user.
Proxy Servers Provide Anonymity
Like a virtual private network (VPN), a proxy server hides the user’s IP address when accessing the Internet. See VPN and TLS.
Address Translation and Caching
The proxy server is a dual-homed host with two network IP addresses. The address on the outbound side is the one the Internet sees. Proxies are often used in conjunction with network address translation (NAT), which hides the users’ IP addresses on the internal network. Proxy servers may also cache Web pages so that the next request for that page can be retrieved much faster. See NAT and proxy cache.
Other Proxies
Anonymous proxy servers let users surf the Web and keep their IP address private (see anonymous proxy). Although not specifically called proxies, Internet email (SMTP) and the Usenet new system (NNTP) are somewhat similar because messages are relayed from sender to recipient. See firewall.
Application Level and Circuit Level
“Application-level” proxies or “application-level gateways” are dedicated to specific content such as HTTP (Web) and FTP (file transfer). In contrast, a “circuit-level” proxy supports every application (see SOCKS).
Forward and Reverse Proxies
In this definition, the proxy servers are “forward proxies” that hide the details of the clients from the servers. However, proxies can also reside at the website to hide details from the clients (see reverse proxy).
A Proxy Server in a LAN
In this example, the proxy server functions as a firewall in the public side of a company network, which is called the “demilitarized zone” (see DMZ).
What is a Proxy Server and How Does it Work? – Varonis
The actual nuts and bolts of how the internet works are not something people often stop to consider. The problem with that is the inherent danger of data security breaches and identity theft that come along with the cute dog pictures, 24-hour news updates, and great deals online.
But what actually happens when you browse the web? You might be using a proxy server at your office, on a Virtual Private Network (VPN) or you could be one of the more tech-savvy who always use a proxy server of some kind or another.
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What’s a Proxy Server?
A proxy server is any machine that translates traffic between networks or protocols. It’s an intermediary server separating end-user clients from the destinations that they browse. Proxy servers provide varying levels of functionality, security, and privacy depending on your use case, needs, or company policy.
If you’re using a proxy server, traffic flows through the proxy server on its way to the address you requested. The request then comes back through that same proxy server (there are exceptions to this rule), and then the proxy server forwards the data received from the website to you.
If that’s all it does, why bother with a proxy server? Why not just go straight from to the website and back?
Modern proxy servers do much more than forward web requests, all in the name of data security and network performance. Proxy servers act as a firewall and web filter, provide shared network connections, and cache data to speed up common requests. A good proxy server keeps users and the internal network protected from the bad stuff that lives out in the wild internet. Lastly, proxy servers can provide a high level of privacy.
How Does a Proxy Server Operate?
Every computer on the internet needs to have a unique Internet Protocol (IP) Address. Think of this IP address as your computer’s street address. Just as the post office knows to deliver your mail to your street address, the internet knows how to send the correct data to the correct computer by the IP address.
A proxy server is basically a computer on the internet with its own IP address that your computer knows. When you send a web request, your request goes to the proxy server first. The proxy server then makes your web request on your behalf, collects the response from the web server, and forwards you the web page data so you can see the page in your browser.
When the proxy server forwards your web requests, it can make changes to the data you send and still get you the information that you expect to see. A proxy server can change your IP address, so the web server doesn’t know exactly where you are in the world. It can encrypt your data, so your data is unreadable in transit. And lastly, a proxy server can block access to certain web pages, based on IP address.
What are Forward Proxies
A forward proxy server sits between the client and an external network. It evaluates the outbound requests and takes action on them before relaying that request to the external resource.
Most proxy services that you’re likely to encounter are forward proxies. Virtual Private Networks and Web content filters are both examples of forward proxies.
What are Reverse Proxies
A reverse proxy server sits between a network and multiple other internal resources. A large website might have dozens of servers that collectively serve requests from a single domain. To accomplish that, client requests would resolve to a machine that would act as a load balancer. The load balancer would then proxy that traffic back to the individual servers.
Some popular open source reverse proxies are:
Varnish
Squid
Why Should You Use a Proxy Server?
There are several reasons organizations and individuals use a proxy server.
To control internet usage of employees and children: Organizations and parents set up proxy servers to control and monitor how their employees or kids use the internet. Most organizations don’t want you looking at specific websites on company time, and they can configure the proxy server to deny access to specific sites, instead redirecting you with a nice note asking you to refrain from looking at said sites on the company network. They can also monitor and log all web requests, so even though they might not block the site, they know how much time you spend cyberloafing.
Bandwidth savings and improved speeds: Organizations can also get better overall network performance with a good proxy server. Proxy servers can cache (save a copy of the website locally) popular websites – so when you ask for, the proxy server will check to see if it has the most recent copy of the site, and then send you the saved copy. What this means is that when hundreds of people hit at the same time from the same proxy server, the proxy server only sends one request to This saves bandwidth for the company and improves the network performance.
Privacy benefits: Individuals and organizations alike use proxy servers to browse the internet more privately. Some proxy servers will change the IP address and other identifying information the web request contains. This means the destination server doesn’t know who actually made the original request, which helps keeps your personal information and browsing habits more private.
Improved security: Proxy servers provide security benefits on top of the privacy benefits. You can configure your proxy server to encrypt your web requests to keep prying eyes from reading your transactions. You can also prevent known malware sites from any access through the proxy server. Additionally, organizations can couple their proxy server with a Virtual Private Network (VPN), so remote users always access the internet through the company proxy. A VPN is a direct connection to the company network that companies provide to external or remote users. By using a VPN, the company can control and verify that their users have access to the resources (email, internal data) they need, while also providing a secure connection for the user to protect the company data.
Get access to blocked resources: Proxy servers allow users to circumvent content restrictions imposed by companies or governments. Is the local sportsball team’s game blacked out online? Log into a proxy server on the other side of the country and watch from there. The proxy server makes it look like you are in California, but you actually live in North Carolina. Several governments around the world closely monitor and restrict access to the internet, and proxy servers offer their citizens access to an uncensored internet.
Now that you have an idea about why organizations and individuals use a proxy server, take a look at the risks below.
Proxy Server Risks
You do need to be cautious when you choose a proxy server: a few common risks can negate any of the potential benefits:
Free proxy server risks
You know the old saying “you get what you pay for? ” Well, using one of the many free proxy server services can be quite risky, even the services using ad-based revenue models.
Free usually means they aren’t investing heavily in backend hardware or encryption. You’ll likely see performance issues and potential data security issues. If you ever find a completely “free” proxy server, tread very carefully. Some of those are just looking to steal your credit card numbers.
Browsing history log
The proxy server has your original IP address and web request information possibly unencrypted, saved locally. Make sure to check if your proxy server logs and saves that data – and what kind of retention or law enforcement cooperation policies they follow.
If you expect to use a proxy server for privacy, but the vendor is just logging and selling your data you might not be receiving the expected value for the service.
No encryption
If you use a proxy server without encryption, you might as well not use a proxy server. No encryption means you are sending your requests as plain text. Anyone who is listening will be able to pull usernames and passwords and account information really easily. Make sure whatever proxy server you use provides full encryption capability.
Types of Proxy Servers
Not all proxy servers work the same way. It’s important to understand exactly what functionality you’re getting from the proxy server, and ensure that the proxy server meets your use case.
Transparent Proxy
A transparent proxy tells websites that it is a proxy server and it will still pass along your IP address, identifying you to the web server. Businesses, public libraries, and schools often use transparent proxies for content filtering: they’re easy to set up both client and server side.
Anonymous Proxy
An anonymous proxy will identify itself as a proxy, but it won’t pass your IP address to the website – this helps prevent identity theft and keep your browsing habits private. They can also prevent a website from serving you targeted marketing content based on your location. For example, if knows you live in Raleigh, NC, they will show you news stories they feel are relevant to Raleigh, NC. Browsing anonymously will prevent a website from using some ad targeting techniques, but is not a 100% guarantee.
Distorting proxy
A distorting proxy server passes along a false IP address for you while identifying itself as a proxy. This serves similar purposes as the anonymous proxy, but by passing a false IP address, you can appear to be from a different location to get around content restrictions.
High Anonymity proxy
High Anonymity proxy servers periodically change the IP address they present to the web server, making it very difficult to keep track of what traffic belongs to who. High anonymity proxies, like the TOR Network, is the most private and secure way to read the internet.
Proxy servers are a hot item in the news these days with the controversies around Net Neutrality and censorship. By removing net neutrality protections in the United States, Internet Service Providers (ISP) are now able to control your bandwidth and internet traffic. ISPs can potentially tell you what sites you can and cannot see. While there’s a great amount of uncertainty around what is going to happen with Net Neutrality, it’s possible that proxy servers will provide some ability to work around an ISPs restrictions.
Varonis analyzes data from proxy servers to protect you from data breaches and cyber attacks. The addition of proxy data gives more context to better analyze user behavior trends for abnormalities. You can get an alert on that suspicious activity with actionable intelligence to investigate and deal with the incident.
For example, a user accessing GDPR data might not be significant on its own. But if they access GDPR data and then try to upload it to an external website, it could be an exfiltration attempt and potential data breach. Without the context provided by file system monitoring, proxy monitoring, and Varonis threat models, you might see these events in a vacuum and not realize you need to prevent a data breach.
Get a 1:1 demo to see these threat models in action – and see what your proxy data could be telling you.
10 Best Free Proxy Servers – Safe and Anonymous Browsing in 2021
Ordinarily, anyone can see what you do online. When you connect to a non-secure website, advertisers, hackers, and government agencies can see where you’re located and what kind of computer you’re using. This information can be used to feed you targeted ads, and it can block you from seeing certain web content.
Web proxies protect your privacy and also help avoid restrictions. Such restrictions may be imposed by a government, workplace, school, or others. In any case, a web proxy helps make the internet as free and anonymous as it should be.
How a Proxy Keeps You Safe
When using a proxy, your request to a website is filtered through a web form, or sometimes a browser extension. The proxy server then acts as an intermediary. It receives your request, finds the right information on the internet, and relays it back to you.
Without this intermediary, the connection between your computer and a website is wide open. But when using a proxy, prying eyes can’t see both sides of the exchange.
As far as the website knows, the request is coming from the proxy server, not from your computer. Personally identifying information – like your IP address – doesn’t make it to the other side.
When it’s not clear who you are, a website doesn’t know whether you’re “allowed” to visit. If your national government blocks a website, it can only block it for people inside the country. But if the site thinks you’re visiting from a foreign server, it will usually let you through.
This way, a proxy can help keep you safe when there are consequences to reading certain information online. However, it’s important to note that proxies alone only offer a basic level of protection. They tend to have a small number of IP addresses, which can be blocked once they are recognized as proxies.
What to Look for in a Free Proxy
Free web proxies have some limitations. But they’re a good option for people who need short-term anonymity or one-time access to blocked content.
Of course, some proxies are better than others. You should do your research before choosing which one to use. Always stick to a service with a solid reputation. Unknown or untested proxies might not work as advertised, or they might even carry a risk of malware infection.
The first feature you should look for in a free web proxy is the number and variety of its servers. If there are many options, you’re less likely to lose your connection. And if some of the available servers are close to you, you’ll probably get better internet speeds.
Not all proxies give details about their servers. And not all of them allow you to choose which ones to connect to. When this information isn’t available, you should be skeptical. But don’t dismiss the service completely. If other users have had a good experience with it, then you might be satisfied with letting the servers’ owners choose one for you.
Another thing to look for in a free web proxy is customizability. Every good proxy will serve the same role as an intermediary in your web browsing. But some will offer additional services beyond hiding your IP address.
Many of the web proxies that we recommend in this article add additional security by encrypting URLs and page content. Many of them give you the option to block scripts and objects, which can increase the risk of malware infection. Some also disable cookies to minimize the storage of your browsing history.
These sorts of tools help you to get the most out of a web proxy without having to pay for decent protection. But the same tools are usually made stronger with paid upgrades. And if you want the absolute best protection, nothing beats a well-tested VPN.
Disadvantages of Proxies
Whatever free web proxy you choose, its extra features are only a bonus. And these usually come with strict limits. You may find that only a certain number of cookies can be encrypted each month. Blocking certain elements of a site might keep you safer but also prevent it from displaying properly.
Even worse, it’s common for proxies – especially free proxies – to come with traffic limits. If you want 24/7 protection from monitoring, hackers, and malware, you might want to upgrade to a paid version. Better yet, you might want to opt for a VPN instead.
Proxies are good enough for getting around firewalls and unblocking content. But they are not as much of a guarantee against monitoring by hackers or your internet service provider. It’s also far more likely that a free proxy could track some of your activities. A premium VPN, such as ExpressVPN has strict no-log policies. One of our top picks is when looking at overall performance.
A VPN will also save you the hassle of having to manually route all your web traffic through the service. To use a web proxy, you have to navigate to the proxy site and then input the URL from there. With a VPN, you can install an app on your device and let it run automatically.
The more advanced VPN option means you’ll be protected when connecting to the internet with third-party apps instead of your web browser. These days, a browser is definitely not the only app that needs protection. But that’s where most free web proxy services end.
Premium VPN services like ExpressVPN offer you a 30-day money-back guarantee so that you can enjoy a risk-free trial of their superior protection.
Try ExpressVPN
Best Free Proxy Servers
Despite the drawbacks, a free proxy might be all that you need. In that case, there are plenty of good options for you to consider.
We’ve combed through existing reviews and tested some free proxy services for ourselves. And from what we’ve found, these are ten of the best free proxy servers out there:
1. KProxy
This seems to be the single most frequently recommended free proxy server. That doesn’t necessarily mean it’s the best. But it does mean that it’s good enough that it satisfies most users, most of the time.
With KProxy, you have ten servers to choose from. You can manually pick from these and switch them anytime. So if you lose access to one server, you’re still protected. There are no imposed speed limits, as with some proxies. And KProxy has a good track record for avoiding detection and blocking by websites and ISPs.
You can access KProxy servers directly through the website, or you can download a browser extension for either Firefox or Chrome.
2. ProxySite
This free web proxy also gives you the opportunity to manually switch between servers. It also offers more than twice as many servers as Kproxy.
You can have ProxySite choose automatically from among servers in the United States and the European Union. Or if you’re having difficulty, you can try them one by one. The specific locations aren’t identified, though, so you can’t be sure of the effect on your connection speed.
ProxySite has been tested for compatibility with YouTube. There are even buttons on the main page that take you, by proxy, to popular sites like Reddit and Twitter. ProxySite is tailor-made to bring anonymity to your everyday online activities.
3.
This option also appears on many “best of” lists, even though its functionality is somewhat limited. doesn’t work with YouTube, Instagram, or Pinterest, and it relies on servers in only 1, 900 locations to mask users’ IP. But it makes up for some of these drawbacks with added security.
allows you to disable cookies, scripts, and objects on any site. In addition to hiding your IP behind the proxy, this service adds a layer of encryption and guarantees that URLs expire after every browser session.
The proxy will not save databases or IP addresses, so you can be confident that your information will not fall into the hands of hackers or advertisers. This makes it a good option for people who are more interested in security than entertainment online. also offers users a full VPN service in addition to its proxy servers.
4. HMA
This web proxy gives you the option to connect to a random server or choose one of 1, 080. These are located on opposite sides of the US and in four different European countries. The geographic coverage is as good as can be expected with a small number of servers.
The HMA proxy also prompts you to set up your connection with three options. You can encrypt URLs, disable cookies, and remove scripts. But that’s about as far as it goes without upgrading to the HMA VPN, which the site will try to sell you.
5. Hidester
Recent user reviews have given Hidester a good reputation for reliability. But it’s not for sure that the reputation will stand up, because this proxy is pretty new.
Still, it seems to be as good an option as other more established proxies on this list. Hidester operates its own servers across both the US and Europe, and access to them is protected with 128-bit encryption and a secure socket layer (SSL).
Its commitment to security extends to free users but paying customers receive access to literally hundreds of additional servers.
Hidester also offers a number of free tools alongside its web proxy. These include a secure password generator and a DNS leak test. These could be major perks for users who want to stay safe online.
6. Anonymouse
If Hidester is a new kid on the block, Anonymouse is an elder statesman of web proxies. It has been around since 1997 and still appears on many lists of most reliable proxy servers.
The main page for Anonymouse shows you the information that snoopers can see when you connect to a site. And it lets you compare that to what they’ll see when you connect through their proxy. But they choose the specific proxy for you, so you’ll just have to trust them.
Tests have actually shown that it’s pretty easy to identify the proxy that you’re using through Anonymouse. So the security might not be the best. But this old service still seems to be improving. Paid users get SSL encryption, and Anonymouse recently launched its own VPN.
Along with the web proxy, you can use Anonymouse to anonymously send e-mails and post to newsgroups. So after all this time, it still has something unique to offer.
7. Megaproxy
Compared to some free proxies, Megaproxy’s servers are harder for snoopers to identify. And that’s without the additional security of its paid version.
You can use Megaproxy by installing a toolbar that lets you type web addresses and route them through a proxy server. It’s a convenient setup, and you can easily switch between regular and protected browsing.
Unfortunately, this might be important with the free version. Megaproxy limits non-paying users to 60 site visits in a five-hour period. And it only encrypts 20 cookies at a time. Still, this adds a little extra privacy that not all free proxies have.
8. NewIPNow
This service acknowledges some of its own limits upfront. It says openly that free proxies might be incompatible with certain websites. That kind of truthfulness in advertising might be a sign of trustworthiness.
Speaking of truth and accuracy, NewIPNow shows you the estimated speed of each server you could connect to. There are about a dozen of these, though they are mostly limited to the United States. But users still receive a new IP address for each session.
You can use NewIPNow on-site or through a Firefox browser extension. There are budget-friendly paid options and they promise 100 percent compatibility. And if you have problems, customer support is a click away.
9. 4everproxy
Before connecting to 4everproxy, you can select both the server and the IP location. There are over ten options for the first selection and even more for the second. By trying different options you can find the perfect balance between security and connection speed.
But speed shouldn’t be much of an issue in any case. Each 4everproxy server boasts a one gigabit per second connection. Each connection also comes with optional SSL encryption and blockage of cookies and scripts.
10. ProxFree
With seven servers in North America and four in Europe, this web proxy offers a decent geographical reach and solid security. After you choose a server, you will be switched to the fastest IP location. But this can also be changed manually.
ProxFree is as customizable as most any free web proxy. SSL encryption is enabled by default but can be turned off. There are check boxes to remove scripts, objects, cookies, and page titles. You can also disable the “referer” and “user agent” headers. This way, the site you’re visiting won’t know what you clicked on to get there, or what type of computer you’re using.
ProxFree has dedicated pages for visiting Facebook, YouTube, and other video streaming sites. You can be confident in your ability to browse social media anonymously and avoid geoblocks on most videos.
Conclusion
None of these proxies would be our first recommendation for people who want to protect their privacy and stay safe online. A trusted VPN will do a better job than any one of these. You can read our newbies guide to VPNs for an in-depth explanation. Our number one choice of VPN is ExpressVPN. But free web proxies are a convenient option, especially for temporary use.
As you can see, there are many good choices available. Their basic function is generally the same, but there are unique advantages to different services. Luckily, they are all free to use and work right in your browser. So you can test them out one by one if you need to.
Free web proxies can be a good way of learning about the risks associated with your web browsing, and how to protect against them. And since some of these providers also have their own VPNs, a web proxy can be a stepping stone to more complete protection. We also took a look at different proxy protocols if you’re looking to understand the other options available to you.
Further Reading
Easy Ways to Hide Your IP Address
Top Really Free VPN Services
Best VPN Browser Extensions for Chrome
Privacy Alert!
Your data is exposed to the websites you visit!
The information above can be used to track you, target you for ads, and monitor what you do online.
VPNs can help you hide this information from websites so that you are protected at all times. We recommend ExpressVPN — the #1 VPN out of over 350 providers we’ve tested. It has military-grade encryption and privacy features that will ensure your digital security, plus — it’s currently offering 49% off.
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Frequently Asked Questions about proxyservers
What is proxy server used for?
A proxy server is any machine that translates traffic between networks or protocols. It’s an intermediary server separating end-user clients from the destinations that they browse. Proxy servers provide varying levels of functionality, security, and privacy depending on your use case, needs, or company policy.May 7, 2021
What is a good proxy server?
Best Free Proxy ServersKProxy. This seems to be the single most frequently recommended free proxy server. … ProxySite. This free web proxy also gives you the opportunity to manually switch between servers. … Hide.me. … HMA. … Hidester. … Anonymouse. … Megaproxy. … NewIPNow.More items…•Oct 19, 2021
Are proxy servers illegal?
Yes, it is legal to use a proxy server. Proxies have many different uses, including enabling remote work; setting up a support system for users who are located outside a particular network; protecting networks and Internet users from malicious content; streaming online content from outside a country and more.
