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Proxy servers can be divided into different types, categories, classes and subgroups. There is no unified classification for this tool used for anonymity and enhancing security online. Below, we'll detail the most common criteria for choosing proxy servers. Read to the end to better understand this issue and to definitively determine which proxy will be needed to solve your task.
Cost of Proxy
Proxy servers can be:
- Paid — these servers are provided for individual use with the possibility of authorization via login and password or IP address. They not only don't slow down but also speed up the connection due to data caching. Payment is required for usage.
- Free — publicly available servers whose data can be freely found on the internet. There is no need to pay for them, but you will not be the only one using them; anyone else can access them as well. They work slowly and with interruptions. They are practically useless for bypassing account blocks in SMM or data scraping.
Visibility of Proxy
By this class, proxy servers can be divided into:
- Standard (Visible)
- Transparent
Data Caching
By this parameter, proxies are divided into two types: caching and non-caching. Let’s discuss each of them in detail:
- Non-caching — this type includes most proxy servers. Non-caching proxies directly access the web resource, always displaying the most up-to-date data.
- Caching — proxies of this type save all loaded data in memory. When a repeated request to the web resource occurs, the request is directed not directly to the site's database but to the information saved on the disk. That is, the user will see what has already been saved in the cache.
Proxy Protocols
Proxy servers operate on three types of protocols:
- HTTP — an outdated type of proxy servers that connect to websites via the unsecured HTTP protocol. Proxies of this type are unsuitable for visiting web resources that operate over a secure connection.
- HTTPS — these are more common than others. They operate on a secure protocol and are suitable for performing most tasks on the internet. They are typically used for web surfing.
- SOCKS 4 / SOCKS 5 — these proxies can work with most programs and protocols. They don't transmit your IP address in the request header, which makes them highly sought after.
Anonymity of Proxy
According to standards, proxy servers are required to inform the web resource to which the request is sent that the user is using a proxy server. This is done by indicating the variables "REMOTE_ADDR" and "HTTP_VIA" in special fields that are responsible for displaying the user's actual IP address. If proxies notify the final web resource to which the request is sent about the actual data of the computer, then they belong to the category of non-anonymous servers. Other proxies, which don't display the real IP address and geolocation of the user, are called anonymous. It's clear that for professional tasks online, only the latter are suitable.
Geolocation of Proxy
Websites on the internet see not only the user's IP addresses but also their geolocation. Web resources understand from which country and even city the request is coming, so when choosing a proxy server, the correct selection of its geolocation is also of great importance. It's essential to choose a server with the most appropriate geolocation for solving a specific task. Fortunately, there is a wide selection of proxies available that allows for this. The geolocation of proxies can be virtually any: the USA, Germany, India, Iran, etc.
Authentication (Access Restrictions)
All types of proxies can be divided into three groups based on this parameter:
- Without authorization — to use these, you only need to enter the proxy data (IP, server port) in the system settings or parameters of the program being used.
- With IP address authorization — access to these servers is granted only to those computers whose IP addresses are included in the allowed list.
- With login/password authorization — to gain access to this type of proxy servers, you need to specify the associated login and password in the system settings or parameters of the program being used.
Mobility
Proxy servers can be divided into two categories based on this parameter:
- Dynamically mobile — these are provided by mobile internet networks. They are offered to clients by major cellular operators. Mobile proxies are more valuable because they have privileges: they have higher limits on social networks, are less frequently blocked by web resources, etc.
- Regular — compared to mobile proxies, servers of this type are less reliable.
Providers
When choosing a proxy server, it's important to clarify which provider it belongs to. This information is visible to web resources when a user connects. If your proxy server belongs to a provider that is blacklisted by an internet platform, then risk-free online promotion or automated data collection will be jeopardized. Conditionally, all proxy servers can be divided into two categories based on this parameter:
- Proxies from small providers — this group includes IP addresses from small providers and sometimes even illegal ones. It's better not to use these proxies, as they are often blacklisted by search engines, social networks and individual companies such as betting firms and financial organizations.
- Proxies from large providers — it's more secure. When used correctly, they can help you avoid account blocks on any internet platforms.
Sources (Methods of Acquisition)
Another important parameter by which existing proxy servers can be divided is their origin. There are three common methods of obtaining proxies:
- Hosting providers — suitable for web surfing if they are not publicly accessible to a wide number of users. They have quite high speed and stability.
- Obtained through viruses — yes, this can happen. These proxies appear when a user's device is infected with a virus. Interestingly, often a person doesn't even realize that their computer has suddenly become a proxy server.
- Composite/Combined — in this case, the client receives a static IP address, but when accessing the internet, other IP addresses are used. The latter are automatically selected by your provider. The advantage of this type of proxy is that if one IP address gets banned, the server is automatically replaced.
Conclusion
Free (public) proxy servers can only be used for one-time visits to websites that are blocked for you. For professional long-term work online, it's better not to use them. They are have limited potential, as they are restricted in functionality and often monetize through the sale of user information to third parties.. Paid private proxies are much more stable. The safest option will be proxies that support login and password authorization. They are more reliable, as they are much harder for malicious actors to hack. It's important to understand that using proxy servers can never guarantee 100% confidentiality, as authorized personnel can request information about the original IP address when searching for individuals who used proxies.
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