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Proxy server – Wikipedia
For Wikipedia’s policy on editing from open proxies, please see Wikipedia:Open proxies. For other uses, see Proxy.
Communication between two computers (shown in grey) connected through a third computer (shown in red) which acts as a proxy server. Bob does not know to whom the information is going, which is the reason that proxies can be used to protect privacy.
In computer networking, a proxy server is a server application that acts as an intermediary between a client requesting a resource and the server providing that resource. 
Instead of connecting directly to a server that can fulfill a requested resource, such as a file or web page, the client directs the request to the proxy server, which evaluates the request and performs the required network transactions. This serves as a method to simplify or control the complexity of the request, or provide additional benefits such as load balancing, privacy, or security. Proxies were devised to add structure and encapsulation to distributed systems.  A proxy server thus functions on behalf of the client when requesting service, potentially masking the true origin of the request to the resource server.
A proxy server may reside on the user’s local computer, or at any point between the user’s computer and destination servers on the Internet. A proxy server that passes unmodified requests and responses is usually called a gateway or sometimes a tunneling proxy. A forward proxy is an Internet-facing proxy used to retrieve data from a wide range of sources (in most cases anywhere on the Internet). A reverse proxy is usually an internal-facing proxy used as a front-end to control and protect access to a server on a private network. A reverse proxy commonly also performs tasks such as load-balancing, authentication, decryption and caching. 
An open proxy forwarding requests from and to anywhere on the Internet.
An open proxy is a forwarding proxy server that is accessible by any Internet user. In 2008, network security expert Gordon Lyon estimates that “hundreds of thousands” of open proxies are operated on the Internet. 
Anonymous proxy – This server reveals its identity as a proxy server but does not disclose the originating IP address of the client. Although this type of server can be discovered easily, it can be beneficial for some users as it hides the originating IP address.
Transparent proxy – This server not only identifies itself as a proxy server but with the support of HTTP header fields such as X-Forwarded-For, the originating IP address can be retrieved as well. The main benefit of using this type of server is its ability to cache a website for faster retrieval.
A reverse proxy taking requests from the Internet and forwarding them to servers in an internal network. Those making requests connect to the proxy and may not be aware of the internal network.
A reverse proxy (or surrogate) is a proxy server that appears to clients to be an ordinary server. Reverse proxies forward requests to one or more ordinary servers that handle the request. The response from the proxy server is returned as if it came directly from the original server, leaving the client with no knowledge of the original server.  Reverse proxies are installed in the neighborhood of one or more web servers. All traffic coming from the Internet and with a destination of one of the neighborhood’s web servers goes through the proxy server. The use of reverse originates in its counterpart forward proxy since the reverse proxy sits closer to the web server and serves only a restricted set of websites. There are several reasons for installing reverse proxy servers:
Encryption/SSL acceleration: when secure websites are created, the Secure Sockets Layer (SSL) encryption is often not done by the web server itself, but by a reverse proxy that is equipped with SSL acceleration hardware. Furthermore, a host can provide a single “SSL proxy” to provide SSL encryption for an arbitrary number of hosts, removing the need for a separate SSL server certificate for each host, with the downside that all hosts behind the SSL proxy have to share a common DNS name or IP address for SSL connections. This problem can partly be overcome by using the SubjectAltName feature of X. 509 certificates.
Load balancing: the reverse proxy can distribute the load to several web servers, each web server serving its own application area. In such a case, the reverse proxy may need to rewrite the URLs in each web page (translation from externally known URLs to the internal locations).
Serve/cache static content: A reverse proxy can offload the web servers by caching static content like pictures and other static graphical content.
Compression: the proxy server can optimize and compress the content to speed up the load time.
Spoon feeding: reduces resource usage caused by slow clients on the web servers by caching the content the web server sent and slowly “spoon feeding” it to the client. This especially benefits dynamically generated pages.
Security: the proxy server is an additional layer of defense and can protect against some OS and web-server-specific attacks. However, it does not provide any protection from attacks against the web application or service itself, which is generally considered the larger threat.
Extranet publishing: a reverse proxy server facing the Internet can be used to communicate to a firewall server internal to an organization, providing extranet access to some functions while keeping the servers behind the firewalls. If used in this way, security measures should be considered to protect the rest of your infrastructure in case this server is compromised, as its web application is exposed to attack from the Internet.
Monitoring and filtering
A content-filtering web proxy server provides administrative control over the content that may be relayed in one or both directions through the proxy. It is commonly used in both commercial and non-commercial organizations (especially schools) to ensure that Internet usage conforms to acceptable use policy.
Content filtering proxy servers will often support user authentication to control web access. It also usually produces logs, either to give detailed information about the URLs accessed by specific users or to monitor bandwidth usage statistics. It may also communicate to daemon-based and/or ICAP-based antivirus software to provide security against virus and other malware by scanning incoming content in real-time before it enters the network.
Many workplaces, schools, and colleges restrict web sites and online services that are accessible and available in their buildings. Governments also censor undesirable content. This is done either with a specialized proxy, called a content filter (both commercial and free products are available), or by using a cache-extension protocol such as ICAP, that allows plug-in extensions to an open caching architecture.
Websites commonly used by students to circumvent filters and access blocked content often include a proxy, from which the user can then access the websites that the filter is trying to block.
Requests may be filtered by several methods, such as a URL or DNS blacklists, URL regex filtering, MIME filtering, or content keyword filtering. Blacklists are often provided and maintained by web-filtering companies, often grouped into categories (pornography, gambling, shopping, social networks, etc.. ).
Assuming the requested URL is acceptable, the content is then fetched by the proxy. At this point, a dynamic filter may be applied on the return path. For example, JPEG files could be blocked based on fleshtone matches, or language filters could dynamically detect unwanted language. If the content is rejected then an HTTP fetch error may be returned to the requester.
Most web filtering companies use an internet-wide crawling robot that assesses the likelihood that content is a certain type. The resultant database is then corrected by manual labor based on complaints or known flaws in the content-matching algorithms.
Some proxies scan outbound content, e. g., for data loss prevention; or scan content for malicious software.
Filtering of encrypted data
Web filtering proxies are not able to peer inside secure sockets HTTP transactions, assuming the chain-of-trust of SSL/TLS (Transport Layer Security) has not been tampered with. The SSL/TLS chain-of-trust relies on trusted root certificate authorities.
In a workplace setting where the client is managed by the organization, devices may be configured to trust a root certificate whose private key is known to the proxy. In such situations, proxy analysis of the contents of an SSL/TLS transaction becomes possible. The proxy is effectively operating a man-in-the-middle attack, allowed by the client’s trust of a root certificate the proxy owns.
Bypassing filters and censorship
If the destination server filters content based on the origin of the request, the use of a proxy can circumvent this filter. For example, a server using IP-based geolocation to restrict its service to a certain country can be accessed using a proxy located in that country to access the service. : 3
Web proxies are the most common means of bypassing government censorship, although no more than 3% of Internet users use any circumvention tools. : 7
Some proxy service providers allow businesses access to their proxy network for rerouting traffic for business intelligence purposes. 
In some cases, users can circumvent proxies which filter using blacklists using services designed to proxy information from a non-blacklisted location. 
Many schools block access to popular websites such as Facebook. Students can use proxy servers to circumvent this security. However, by connecting to proxy servers, they might be opening themselves up to danger by passing sensitive information such as personal photos and passwords through the proxy server. Some content filters block proxy servers in order to keep users from using them to bypass the filter.
Logging and eavesdropping
Proxies can be installed in order to eavesdrop upon the data-flow between client machines and the web. All content sent or accessed – including passwords submitted and cookies used – can be captured and analyzed by the proxy operator. For this reason, passwords to online services (such as webmail and banking) should always be exchanged over a cryptographically secured connection, such as SSL.
By chaining the proxies which do not reveal data about the original requester, it is possible to obfuscate activities from the eyes of the user’s destination. However, more traces will be left on the intermediate hops, which could be used or offered up to trace the user’s activities. If the policies and administrators of these other proxies are unknown, the user may fall victim to a false sense of security just because those details are out of sight and mind.
In what is more of an inconvenience than a risk, proxy users may find themselves being blocked from certain Web sites, as numerous forums and Web sites block IP addresses from proxies known to have spammed or trolled the site. Proxy bouncing can be used to maintain privacy.
A caching proxy server accelerates service requests by retrieving the content saved from a previous request made by the same client or even other clients. Caching proxies keep local copies of frequently requested resources, allowing large organizations to significantly reduce their upstream bandwidth usage and costs, while significantly increasing performance. Most ISPs and large businesses have a caching proxy. Caching proxies were the first kind of proxy server. Web proxies are commonly used to cache web pages from a web server.  Poorly implemented caching proxies can cause problems, such as an inability to use user authentication. 
A proxy that is designed to mitigate specific link related issues or degradation is a Performance Enhancing Proxy (PEPs). These are typically used to improve TCP performance in the presence of high round-trip times or high packet loss (such as wireless or mobile phone networks); or highly asymmetric links featuring very different upload and download rates. PEPs can make more efficient use of the network, for example, by merging TCP ACKs (acknowledgements) or compressing data sent at the application layer. 
A translation proxy is a proxy server that is used to localize a website experience for different markets. Traffic from the global audience is routed through the translation proxy to the source website. As visitors browse the proxied site, requests go back to the source site where pages are rendered. The original language content in the response is replaced by the translated content as it passes back through the proxy. The translations used in a translation proxy can be either machine translation, human translation, or a combination of machine and human translation. Different translation proxy implementations have different capabilities. Some allow further customization of the source site for the local audiences such as excluding the source content or substituting the source content with the original local content.
Accessing services anonymously
An anonymous proxy server (sometimes called a web proxy) generally attempts to anonymize web surfing. Anonymizers may be differentiated into several varieties. The destination server (the server that ultimately satisfies the web request) receives requests from the anonymizing proxy server and thus does not receive information about the end user’s address. The requests are not anonymous to the anonymizing proxy server, however, and so a degree of trust is present between the proxy server and the user. Many proxy servers are funded through a continued advertising link to the user.
Access control: Some proxy servers implement a logon requirement. In large organizations, authorized users must log on to gain access to the web. The organization can thereby track usage to individuals. Some anonymizing proxy servers may forward data packets with header lines such as HTTP_VIA, HTTP_X_FORWARDED_FOR, or HTTP_FORWARDED, which may reveal the IP address of the client. Other anonymizing proxy servers, known as elite or high-anonymity proxies, make it appear that the proxy server is the client. A website could still suspect a proxy is being used if the client sends packets that include a cookie from a previous visit that did not use the high-anonymity proxy server. Clearing cookies, and possibly the cache, would solve this problem.
QA geotargeted advertising
Advertisers use proxy servers for validating, checking and quality assurance of geotargeted ads. A geotargeting ad server checks the request source IP address and uses a geo-IP database to determine the geographic source of requests.  Using a proxy server that is physically located inside a specific country or a city gives advertisers the ability to test geotargeted ads.
A proxy can keep the internal network structure of a company secret by using network address translation, which can help the security of the internal network.  This makes requests from machines and users on the local network anonymous. Proxies can also be combined with firewalls.
An incorrectly configured proxy can provide access to a network otherwise isolated from the Internet. 
Proxies allow web sites to make web requests to externally hosted resources (e. g. images, music files, etc. ) when cross-domain restrictions prohibit the web site from linking directly to the outside domains. Proxies also allow the browser to make web requests to externally hosted content on behalf of a website when cross-domain restrictions (in place to protect websites from the likes of data theft) prohibit the browser from directly accessing the outside domains.
Secondary market brokers
Secondary market brokers use web proxy servers to buy large stocks of limited products such as limited sneakers or tickets.
Implementations of proxies
Web proxy servers
Web proxies forward HTTP requests. The request from the client is the same as a regular HTTP request except the full URL is passed, instead of just the path. 
GET HTTP/1. 1
Proxy-Authorization: Basic encoded-credentials
This request is sent to the proxy server, the proxy makes the request specified and returns the response.
HTTP/1. 1 200 OK
Content-Type: text/html; charset UTF-8
Some web proxies allow the HTTP CONNECT method to set up forwarding of arbitrary data through the connection; a common policy is to only forward port 443 to allow HTTPS traffic.
Examples of web proxy servers include Apache (with mod_proxy or Traffic Server), HAProxy, IIS configured as proxy (e. g., with Application Request Routing), Nginx, Privoxy, Squid, Varnish (reverse proxy only), WinGate, Ziproxy, Tinyproxy, RabbIT and Polipo.
For clients, the problem of complex or multiple proxy-servers is solved by a client-server Proxy auto-config protocol (PAC file).
SOCKS also forwards arbitrary data after a connection phase, and is similar to HTTP CONNECT in web proxies.
Also known as an intercepting proxy, inline proxy, or forced proxy, a transparent proxy intercepts normal application layer communication without requiring any special client configuration. Clients need not be aware of the existence of the proxy. A transparent proxy is normally located between the client and the Internet, with the proxy performing some of the functions of a gateway or router. 
RFC 2616 (Hypertext Transfer Protocol—HTTP/1. 1) offers standard definitions:
“A ‘transparent proxy’ is a proxy that does not modify the request or response beyond what is required for proxy authentication and identification”. “A ‘non-transparent proxy’ is a proxy that modifies the request or response in order to provide some added service to the user agent, such as group annotation services, media type transformation, protocol reduction, or anonymity filtering”.
TCP Intercept is a traffic filtering security feature that protects TCP servers from TCP SYN flood attacks, which are a type of denial-of-service attack. TCP Intercept is available for IP traffic only.
In 2009 a security flaw in the way that transparent proxies operate was published by Robert Auger,  and the Computer Emergency Response Team issued an advisory listing dozens of affected transparent and intercepting proxy servers. 
Intercepting proxies are commonly used in businesses to enforce acceptable use policy, and to ease administrative overheads since no client browser configuration is required. This second reason however is mitigated by features such as Active Directory group policy, or DHCP and automatic proxy detection.
Intercepting proxies are also commonly used by ISPs in some countries to save upstream bandwidth and improve customer response times by caching. This is more common in countries where bandwidth is more limited (e. island nations) or must be paid for.
The diversion/interception of a TCP connection creates several issues. First, the original destination IP and port must somehow be communicated to the proxy. This is not always possible (e. g., where the gateway and proxy reside on different hosts). There is a class of cross-site attacks that depend on certain behavior of intercepting proxies that do not check or have access to information about the original (intercepted) destination. This problem may be resolved by using an integrated packet-level and application level appliance or software which is then able to communicate this information between the packet handler and the proxy.
Intercepting also creates problems for HTTP authentication, especially connection-oriented authentication such as NTLM, as the client browser believes it is talking to a server rather than a proxy. This can cause problems where an intercepting proxy requires authentication, then the user connects to a site that also requires authentication.
Finally, intercepting connections can cause problems for HTTP caches, as some requests and responses become uncacheable by a shared cache.
In integrated firewall/proxy servers where the router/firewall is on the same host as the proxy, communicating original destination information can be done by any method, for example Microsoft TMG or WinGate.
Interception can also be performed using Cisco’s WCCP (Web Cache Control Protocol). This proprietary protocol resides on the router and is configured from the cache, allowing the cache to determine what ports and traffic is sent to it via transparent redirection from the router. This redirection can occur in one of two ways: GRE tunneling (OSI Layer 3) or MAC rewrites (OSI Layer 2).
Once traffic reaches the proxy machine itself interception is commonly performed with NAT (Network Address Translation). Such setups are invisible to the client browser, but leave the proxy visible to the web server and other devices on the internet side of the proxy. Recent Linux and some BSD releases provide TPROXY (transparent proxy) which performs IP-level (OSI Layer 3) transparent interception and spoofing of outbound traffic, hiding the proxy IP address from other network devices.
Several methods may be used to detect the presence of an intercepting proxy server:
By comparing the client’s external IP address to the address seen by an external web server, or sometimes by examining the HTTP headers received by a server. A number of sites have been created to address this issue, by reporting the user’s IP address as seen by the site back to the user on a web page. Google also returns the IP address as seen by the page if the user searches for “IP”.
By comparing the result of online IP checkers when accessed using HTTPS vs HTTP, as most intercepting proxies do not intercept SSL. If there is suspicion of SSL being intercepted, one can examine the certificate associated with any secure web site, the root certificate should indicate whether it was issued for the purpose of intercepting.
By comparing the sequence of network hops reported by a tool such as traceroute for a proxied protocol such as (port 80) with that for a non-proxied protocol such as SMTP (port 25). 
By attempting to make a connection to an IP address at which there is known to be no server. The proxy will accept the connection and then attempt to proxy it on. When the proxy finds no server to accept the connection it may return an error message or simply close the connection to the client. This difference in behavior is simple to detect. For example, most web browsers will generate a browser created error page in the case where they cannot connect to an HTTP server but will return a different error in the case where the connection is accepted and then closed. 
By serving the end-user specially programmed Adobe Flash SWF applications or Sun Java applets that send HTTP calls back to their server.
A CGI web proxy accepts target URLs using a Web form in the user’s browser window, processes the request, and returns the results to the user’s browser. Consequently, it can be used on a device or network that does not allow “true” proxy settings to be changed. The first recorded CGI proxy, named “rover” at the time but renamed in 1998 to “CGIProxy”,  was developed by American computer scientist James Marshall in early 1996 for an article in “Unix Review” by Rich Morin. 
The majority of CGI proxies are powered by one of CGIProxy (written in the Perl language), Glype (written in the PHP language), or PHProxy (written in the PHP language). As of April 2016, CGIProxy has received about 2 million downloads, Glype has received almost a million downloads,  whilst PHProxy still receives hundreds of downloads per week.  Despite waning in popularity due to VPNs and other privacy methods, as of September 2021 there are still a few hundred CGI proxies online. 
Some CGI proxies were set up for purposes such as making websites more accessible to disabled people, but have since been shut down due to excessive traffic, usually caused by a third party advertising the service as a means to bypass local filtering. Since many of these users don’t care about the collateral damage they are causing, it became necessary for organizations to hide their proxies, disclosing the URLs only to those who take the trouble to contact the organization and demonstrate a genuine need. 
A suffix proxy allows a user to access web content by appending the name of the proxy server to the URL of the requested content (e. “”). Suffix proxy servers are easier to use than regular proxy servers but they do not offer high levels of anonymity and their primary use is for bypassing web filters. However, this is rarely used due to more advanced web filters.
Tor onion proxy software
Tor is a system intended to provide online anonymity.  Tor client software routes Internet traffic through a worldwide volunteer network of servers for concealing a user’s computer location or usage from someone conducting network surveillance or traffic analysis. Using Tor makes tracing Internet activity more difficult,  and is intended to protect users’ personal freedom, privacy.
“Onion routing” refers to the layered nature of the encryption service: The original data are encrypted and re-encrypted multiple times, then sent through successive Tor relays, each one of which decrypts a “layer” of encryption before passing the data on to the next relay and ultimately the destination. This reduces the possibility of the original data being unscrambled or understood in transit. 
I2P anonymous proxy
The I2P anonymous network (‘I2P’) is a proxy network aiming at online anonymity. It implements garlic routing, which is an enhancement of Tor’s onion routing. I2P is fully distributed and works by encrypting all communications in various layers and relaying them through a network of routers run by volunteers in various locations. By keeping the source of the information hidden, I2P offers censorship resistance. The goals of I2P are to protect users’ personal freedom, privacy, and ability to conduct confidential business.
Each user of I2P runs an I2P router on their computer (node). The I2P router takes care of finding other peers and building anonymizing tunnels through them. I2P provides proxies for all protocols (HTTP, IRC, SOCKS,… ).
Comparison to network address translators
The proxy concept refers to a layer 7 application in the OSI reference model. Network address translation (NAT) is similar to a proxy but operates in layer 3.
In the client configuration of layer-3 NAT, configuring the gateway is sufficient. However, for the client configuration of a layer 7 proxy, the destination of the packets that the client generates must always be the proxy server (layer 7), then the proxy server reads each packet and finds out the true destination.
Because NAT operates at layer-3, it is less resource-intensive than the layer-7 proxy, but also less flexible. As we compare these two technologies, we might encounter a terminology known as ‘transparent firewall’. Transparent firewall means that the proxy uses the layer-7 proxy advantages without the knowledge of the client. The client presumes that the gateway is a NAT in layer 3, and it does not have any idea about the inside of the packet, but through this method, the layer-3 packets are sent to the layer-7 proxy for investigation.
A DNS proxy server takes DNS queries from a (usually local) network and forwards them to an Internet Domain Name Server. It may also cache DNS records.
Some client programs “SOCKS-ify” requests,  which allows adaptation of any networked software to connect to external networks via certain types of proxy servers (mostly SOCKS).
A residential proxy is an intermediary that uses a real IP address provided by an Internet Service Provider (ISP) with physical devices such as mobiles and computers of end-users. Instead of connecting directly to a server, residential proxy users connect to the target through residential IP addresses. The target then identifies them as organic internet users. It does not let any tracking tool identify the reallocation of the user. Any residential proxy can send any number of concurrent requests and IP addresses are directly related to a specific region. 
Web accelerator which discusses host-based HTTP acceleration
Distributed Checksum Clearinghouse
SOCKS an alternative firewall traversal protocol supported by many applications
^ World-Wide Web Proxies, Ari Luotonen, April 1994
^ , Marc Shapiro. Structure and Encapsulation in Distributed Systems: the Proxy Principle. Int. Conf. on Distr. Comp. Sys. (ICDCS), 1986, Cambridge, MA, USA, United States. pp. 198–204, 1986, Int. (ICDCS).
^ “Proxy servers and tunneling”. MDN Web Docs. Retrieved 6 December 2020.
^ a b Lyon, Gordon (2008). Nmap network scanning. US: Insecure. p. 270. ISBN 978-0-9799587-1-7.
^ “Forward and Reverse Proxies”. d mod_proxy. Apache. Retrieved 20 December 2010.
^ a b “2010 Circumvention Tool Usage Report” (PDF). The Berkman Center for Internet & Society at Harvard University. October 2010.
^ “How to Check if Website is Down or Working Worldwide”. Hostinger. 19 November 2019. Retrieved 14 December 2019.
^ “Using a Ninjaproxy to get through a filtered proxy”. advanced filtering mechanics. TSNP. Archived from the original on 9 March 2016. Retrieved 17 September 2011.
^ Thomas, Keir (2006). Beginning Ubuntu Linux: From Novice to Professional. Apress. ISBN 978-1-59059-627-2. A proxy server helps speed up Internet access by storing frequently accessed pages
^ I. Cooper; J. Dilley (June 2001). Known HTTP Proxy/Caching Problems. IETF. doi:10. 17487/RFC3143. RFC 3143. Retrieved 17 May 2019.
^ “Layering”. Performance Enhancing Proxies Intended to Mitigate Link-Related Degradations. June 2001. p. 4. sec. 2. 1. 17487/RFC3135. RFC 3135. Retrieved 21 February 2014.
^ Zhang, Xiaoyi; Ross, Anne Spencer; Caspi, Anat; Fogarty, James; Wobbrock, Jacob O. (2017). Interaction Proxies for Runtime Repair and Enhancement of Mobile Application Accessibility. Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems. pp. 6024–6037. 1145/3025453. 3025846. ISBN 9781450346559. S2CID 20937177.
^ “Hot Tactics For Geo-Targeted Ads on Google & Bing”. Retrieved 7 February 2014.
^ “Firewall and Proxy Server HOWTO”. Retrieved 4 September 2011. The proxy server is, above all, a security device.
^ “Sneaker Bot Supreme Proxy”. GeoSurf. Retrieved 24 September 2017.
^ “absolute-form”. HTTP/1. 1 Message Syntax and Routing. June 2014. p. 41. sec. 5. 3. 2. 17487/RFC7230. RFC 7230. Retrieved 4 November 2017. a client MUST send the target URI in absolute-form as the request-target
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^ Marshall, James. “CGIProxy”. Retrieved 12 November 2018.
^ “The Limit
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How to Set Up a Proxy Server on Your PC, Mac, or Web Browser – Avast
As for what a proxy server is, think of your proxy as a gateway between you and the internet. When you visit a website, the proxy server communicates with it on behalf of your browser. Then, when the website answers, the proxy forwards the data to you.
Proxy servers can do many jobs. These include scanning for viruses, acting as a firewall, speeding up your connection by caching, and hiding your public IP address.
You have lots of choices when it comes to internet privacy. There’s a lot to learn, such as understanding what a reverse proxy is or distinguishing between VPNs, proxies, and Tor. If you want dependable protection and encryption for your internet traffic, consider a VPN. Avast SecureLine VPN hides your data from snoopers and protects your online identity, and it’s also much easier to set up than a proxy server.
There’s no similar guarantee of protection with a proxy, especially if you’re using one of the many web-based proxies available online. These public proxy services may slow down your service, and even worse, they may be insecure. Instead, we suggest you learn how to set up a proxy server on Windows, MacOS, and the most popular web browsers.
If you’re configuring your browser to use a proxy operated by a company, school, or other similar organization, some of these instructions may require you to contact your IT staff. This is the case particularly when you are asked to manually enter a script name, formally called a proxy auto-configuration (PAC) file. You may also need to type in the proxy’s IP and port numbers. In both cases, turn to your IT helpdesk if you haven’t been given this information. If you’re using a proxy that you’ve purchased or created on your own, you’ll already have these details.
How to set up a proxy server in Windows
Here’s how to set up your Windows PC to use a proxy server on Windows 8 or Windows 10:
Press the Windows + I keys simultaneously to access the Windows Settings menu.
On Windows 10, click Settings > Network & Internet > Proxy. On Windows 8, click Settings > Network Proxy.
Under the Manual Setup section, set the “Use a Proxy Server” toggle to On. Make sure the “Automatically detect settings” toggle is also on.
By default, Windows automatically checks to see if your business, school, or local network already has an automatic proxy server setup ready to run for you. If it does, Windows tells you its name, and encourages you to follow its instructions.
Assuming that Windows finds a PAC file, in the Automatic Proxy Setup, set the Use Setup Script switch to On.
Enter the script address and click Save.
Congratulations! You’re done and ready to proxy.
How to manually set up a proxy in Windows 8 or Windows 10
Not every organization sets up the process automatically. If you need to set up a proxy manually in Windows 8 or Windows 10, here’s how to do it.
To access the Windows Settings menu, press the Windows + I keys simultaneously.
On Windows 10, click Settings > Network & Internet > Proxy. On Windows 8 systems, click Settings > Network Proxy.
Scroll down to “Manual proxy setup” and set the “Use a Proxy Server” switch to On.
In the address field, type the proxy server name or IP address. In the Port field, enter the proxy port number. You can get these from your IT support tech.
If the proxy server is protected by a password, select the “Proxy server requires password” checkbox. Enter your account name and password in the Username and Password fields.
That’s all there is to it. You’re now set up to use your proxy server on Windows. The next time you use the internet, you’ll be using the proxy server.
How to set up a proxy server on a Mac running macOS
Here’s how to set up a proxy server on a Mac running macOS 10. 15 Catalina. Other macOS versions use essentially the same commands.
Open System Preferences. One way to get there is to click on the Apple menu > System Preferences.
Choose the Network icon to adjust connectivity settings.
Select the type of network you use, which is usually Ethernet or Wi-Fi.
Click Advanced > Proxies.
To automatically configure your proxy server settings, select Auto Proxy Discovery. Click on Secure Web Proxy (HTTPS). Type in the proxy server address and its port number in the fields on the right.
To use a proxy auto-configuration (PAC) file, select Automatic Proxy Configuration and enter the proxy address into the URL field.
Click OK to save the proxy setup.
You’re now ready to surf the internet via your proxy.
How to set up a proxy in Google Chrome
By default, Chrome uses your macOS or Windows proxy. To change your proxy settings from within Chrome, take the following steps:
Open the Chrome toolbar and select Settings.
Scroll down to the bottom of the display. Click on Show advanced settings…
Scroll down to “System” and choose Open your computer’s proxy settings.
Next, go back to the instructions for your operating system listed above to set up your proxy server settings and follow them.
In short, to set up a proxy server in Google Chrome, you’re just doing the first few steps in the browser, and then completing the process in your machine’s operating system.
How to set up a proxy server in Safari
Like Chrome, Safari’s default setting is to follow the proxy configurations within your OS. Here’s how to change your proxy settings from within Safari:
Click on Safari in the browser toolbar. Choose Preferences.
Click on the Advanced tab. Under “Proxies, ” click Change settings…
Next, you must go back to the instructions for macOS listed above to set up your proxy server settings and follow them.
How to set up a proxy server in Edge
Edge is Windows 10’s built-in web browser, and unless you tell it otherwise, it’ll use your proxy configurations in Windows. The latest versions of Edge are based on Chrome, so the configuration is similar. The following steps show you how to set up a proxy from within Edge:
In Microsoft Edge, at the top-right corner, click the Menu button. Select Settings.
Scroll down to the Advanced settings section and click the View advanced settings icon.
Click the Open proxy settings button.
Next, go back to the instructions for Windows 10 listed above, then follow them to configure your proxy server settings.
How to set up a proxy server in Firefox
Unlike other web browsers, Firefox doesn’t default to using your system’s proxy settings. You’ll need to change your proxy from within Firefox:
Open the Firefox menu and select Options.
Click on the Advanced icon.
Select the Network tab.
In the Connection Settings, select, Auto-detect proxy configuration for this network. When prompted, enter the proxy address.
Alternatively, in the Connection Settings, you can select, Use system proxy settings. If you choose that option, Firefox uses the proxy settings in your operating system.
Click OK to save your settings.
How to set up a proxy server in Internet Explorer
Please keep in mind that Internet Explorer is an outdated web browser. Instead, switch to a browser that’s still receiving regular updates and support, such as Avast Secure Browser, Chrome, Edge, Firefox, or Safari. Though since quite a few people and companies still use Internet Explorer (IE), you should know how to set things up when necessary.
As with other browsers, IE defaults to using your Windows proxy configurations. Here’s how to set your proxy up from within IE.
Open the IE toolbar and select Internet Options.
Open the Connections tab.
Select LAN Settings.
Check the “Use a proxy server for your LAN” box.
When prompted, enter the proxy server name and port number.
How to set up a proxy server in Android
With Android, you must configure proxy settings for each network you use. In addition, the proxy will only be used by your web browser. Other internet applications may choose to use or ignore the proxy based on their own internal settings. This is another reason why VPNs tend to be better choices — when you use one, it covers all the internet traffic from your device.
Open Android’s Settings and tap Wi-Fi to view a list of Wi-Fi networks.
Long-press the Wi-Fi network name for which you want to change the proxy settings. Tap Modify Network.
Tap Advanced Options.
Tap Manual to change your proxy’s settings. Enter your hostname and proxy port.
If you have a Proxy Auto-Config (PAC) file, select Proxy Auto-Config and Android will prompt you to enter the PAC address.
How to set up a proxy server in iOS
Go to Settings > Wi-Fi.
Select the active Wi-Fi connection.
Under HTTP proxy, click Configure Proxy.
Tap Manual to change your proxy’s settings. Enter your host name, proxy port, and, if needed, your authentication username and password.
If your provider supports Web Proxy Auto-Discovery Protocol (WPAD), tap Automatic. If required, enter the Proxy Auto-Config (PAC) file location.
Tap back to the Wi-Fi selection window.
Protect your online anonymity the easy way
Proxy servers have their uses, particularly within large organizations. However, setting one up requires a bit of work, and this is a job typically entrusted to network administrators and other IT professionals.
Avast SecureLine VPN is an internet privacy solution that’s both simpler to use and far more protective of your identity and online activities. A single click or tap of a button gets you encryption that keeps you anonymous online and prevents anyone from snooping on your sensitive personal info, such as your online banking, health info, or private photos. Enjoy true online privacy on your desktop, laptop or mobile device with a VPN that’s as convenient as it is secure.
How to Hide Your Location – An Online Safety Guide
Ever got the creepy feeling that you’re being followed? You might not be entirely wrong. When you surf the internet, there are several entities that keep a track of your details, including your location.
When you’re on the internet, you’re assigned an IP address. It looks something like this: 192. 168. 23. 132
This magic number holds important details and when you visit a website, the web admin gets to know some bits about you, such as your location and your internet provider.
You might think that your IP address reveals your home address but it doesn’t. Even the city details given by the IP might not be correct. However, it does give the web admin an idea about your whereabouts.
If you want to stay secure and hide your location on the internet, here are some things you can do.
Use a proxy to hide your location
Look around and you’ll find several free proxies. When you open a website through a proxy, it redirects your traffic through a proxy server so the website you visit sees the IP of that server and not your real IP.
So far so good. But the problem is that many free proxies add trackers to follow your browsing habits. Can you really blame them, though – they’re offering free services, they need something in return.
With a proxy, you’re laying open your information to the proxy server. So while you’re able to change your location, it’s not really a safe thing to do, which brings us to the second option.
Use a VPN to hide your location
A VPN, in addition to changing your location, also encrypts your traffic. A proxy only covers the traffic you send through your web browser. The other applications on your device aren’t covered by a proxy. For example, if you’re downloading a file using BitTorrent, that traffic will not be passed through the proxy server.
On the other hand, a VPN will cover all the activities you perform online. It will also keep you protected on unsecured networks like public Wi-Fi hotspots. However, a proxy will not protect you there.
But a VPN isn’t the only reliable solution. There is also a third option.
Use Tor to hide your location
Tor is a network that sends your data over several nodes before directing it to the final destination. The website you visit can see the IP of the last node.
There are some limitations to Tor though – it makes the connection slow since the traffic hops over several nodes. Also, like a proxy, Tor will cover only your browsing session. Tor is more reliable than a proxy but will not cover your torrent activity.
If you want to cover your tracks when you’re online, make sure you hide your location using any of these three options.
To learn more about the pros and cons of each of these three methods, please read “Tor vs VPN vs Proxy“
Frequently Asked Questions about proxy server location
How do I change my proxy server location?
How to set up a proxy server in Internet ExplorerOpen the IE toolbar and select Internet Options.Open the Connections tab.Select LAN Settings.Check the “Use a proxy server for your LAN” box.When prompted, enter the proxy server name and port number.Click OK to save your settings.Mar 11, 2020
Does a proxy server change your location?
Use a proxy to hide your location When you open a website through a proxy, it redirects your traffic through a proxy server so the website you visit sees the IP of that server and not your real IP. … So while you’re able to change your location, it’s not really a safe thing to do, which brings us to the second option.Nov 27, 2018
What is a proxy server address for WIFI?
A proxy server provides a gateway between users and the internet. It is a server, referred to as an “intermediary” because it goes between end-users and the web pages they visit online. When a computer connects to the internet, it uses an IP address.