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No Proxy for Proxies

Starting off with the real world, a proxy is nothing but a substitute. It is something that ‘acts on behalf of’ something else. When it comes to networking, a proxy in effect is the same. It acts as an intermediary between the source; The computer and the destination;The internet i.e. instead of a client computer directly interacting with the internet, a proxy computer or server interacts with the internet on behalf of the client computer. However, in today’s date proxies aren’t used in the traditional manner that they were originally intended to, since its function comes built in with the modern day routers. That being said, they are still very active in the hacking and the security arena of networking.
In networking, the major types of proxies are:

  1. Transparent Proxy: In such a proxy, the client/source attempts to directly communicate with a site, but is intercepted by the proxy. However, the main factor that makes it ‘transparent’ is the fact that the source is not aware of the presence of the proxy, but the destination is well aware.
  2. Reverse Proxy/Anti DDoS Proxy: In such a proxy, the client/source is ‘made’ to believe that the proxy itself is the destination from which the client has requested resources from.
  3. Anonymous Proxy: The original address of the client is masked/hidden, which makes it really hard to track down, and thus provides the client server anonymity.
  4. High Anonymity Proxy: In such a proxy, it makes the proxy server itself appear as the client, thus making it seem like the communication is directly made between the client and the site/destination server.
  5. Distorting Proxy: It generally modifies the IP address/machine address of the client so as to prevent the target/destination from knowing about it.
  6. Forward/Normal Proxy: It is the most basic type of proxy, whereby the client interacts with the proxy, subsequently, the proxy interacts with the destination server and lastly, the proxy returns the information retrieved from the destination back to the client. source. Here, both the source and the destination are completely aware of the presence of the proxy.

A website/network once built, is prone to attacks from various sources from across the globe or even from within its own server network, if it is not properly protected. One major threat to the network, is the denial of service or DoS attack. In a DoS attack, the network or host connected to the internet is rendered unavailable due to the presence of any malicious software,or what is commonly known as a ‘Virus’, in the network to which the ‘Host’ of a server is connected. When the source of attack is more than one, which is more likely, then there is said to be a DDoS or Distributed Denial of Service attack on the network. In a DDoS attack, several malware affected computers as well as the human-like-bots created by the attacker to spread the malware act together on a single target server, causing the server to eventually fail. To put a DDoS attack into perspective, Suppose you are at a concert, and the entry to the arena is over crowded, then, the musicians themselves will not be able to enter the arena, thus disrupting the norms. It can also be visualized as a zombie attack, where thousands of infected zombies (malware affected networks) trying to attack the non infected (host/target network).
An effective method used to counter such attacks, is the ‘anti ddos proxy method’. Before getting into that, we need to understand what ‘DDoS mitigation’ is. Let’s simplify the mitigation process into steps:

  1. Various signals that attempt to get in contact with the target network is collectively known as traffic.
  2. This traffic consists of both ‘human’ traffic (non-malware/clean) as well as human-like-bots traffic (malware/harmful), that needs to be separated from each other, to ensure safe transmission of traffic to the target network.
  3. All the traffic that are en-route to the target network, are made to pass through networks that have, “traffic-scrubbing” filters.
  4.  Here, different attributes of the incoming traffic, such as ip address, html headers, javascript footprints etc. of the different signals are compared, in order to determine if they originate from a legitimate source.

 

Now, this is where the anti ddos proxy/reverse proxies comes into the picture. As mentioned before, a proxy acts as an intermediary, between the client and the server. In the current scenario, if we make the client, i.e the target network, interact with the proxy (reverse proxy), and then make the proxy interact with the server, and finally, the ‘clean’ information is transmitted back to the client as though the information originated at the proxy.
This is different form a normal/forward proxy, as the client is ‘unaware’ of the presence of a different source. For the client, it is as though the ‘proxy’ itself is the source of the signal. A reverse proxy/anti ddos proxy is usually preferred and used, since the main server and its address is protected from the ‘public’ and from any malicious activities.Thus, the anti ddos proxy provides us with that added security as no malicious traffic will be able to directly interact with the target network.
The advantages of having an anti ddos proxy are:

  • Security and Anonymity: Anti ddos proxy ensures that identity of the main server is protected by a combination of address masking and ddos mitigation, thus accounting for the security of the target network.
  • Faster Data Access And Transfer: Anti ddos proxy can compress the inbound and outbound data, as a result the data to be transmitted is reduced and the process is faster.
  • Ensures there is no overloading: Anti ddos proxy also ensure that the request of the client is well distributed over the servers rather than overloading a single server, again ensuring effective transmission of data and signals.

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Anonymous Proxy Servers

An anonymous proxy server is one of the most common kinds of servers that many individuals and organizations use today while surfing the web. This proxy is equipped with software that wipes out information about your IP address from any page that you request online, and replaces it with its own. It sort of makes you look like a ghost on the web. In fact, an anonymous proxy erases even information about your actual location, thereby hindering any form of illegal connections to your personal computer, laptop or any other device being used to browse on the internet.
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Proxy Servers for DDoS Mitigation

Proxy Definition

Learn all about anti DDoS proxy servers: A proxy is a computer, software system that sits between clients application and a real server. It is used to filter cache.

Importance

It’s main importance is that it improves performance of group users because it saves results of all requests a specific amount of time. They can also be used to filter request for example; restricting some staff in the organisation from accessing certain sets of websites. The server might be in the computer system or as a separate server that forwards requests to firewall. A proxy server can also be helpful in troubleshooting as it logs in its interactions. On the other hand a proxy server can also be used to monitor traffic and undermine user privacy.

How proxy servers works

A proxy server receives its requests from the internet source for example a web page looks into its previously requested pages cache, finds the page and forwards it to the requester/client without necessarily forwarding it back to the internet. When the page is not found in its cache,the server uses its IP address on behalf of the user to ask/prompt the information from the internet and when the information is prompted, the server relates the content to the original page and forwards it to the requester. The server is evidently invisible to the user.

Types of Proxies

Forward Proxies

These proxies sends the user’s request onward to a web server. This is achieved by directly surfing to a web proxy addresses or configuring their internet settings. They increase security and privacy but can also be used to download illegal materials like pornography or copyrighted materials.

Normal Proxies

This is a regular caching proxy server that listens on a separate port and the client’s browser is configured and sends requests for connectivity on that port. The proxy server receives the request, gets the content and saves a copy for future reference.

Reverse Proxies

A reverse proxy appears ordinary to the clients. Its usage benefits the web server rather than the client.It handles all requests on the destination server without any asking for any action from the requester. It caches all the answers and answers the requester from its cache to reduce load on the web server. This is also known as Web server Acceleration.

Uses of Reverse Proxies

Acts a security measure: To enable indirect access and disallowing direct connections. This protects the system against OS and web server attacks.

Load Balancing between servers: It distributes the load to web servers serving specific application areas. Thus rewriting URLs in each web page.

Compression: Reverse proxies have the ability to compress and optimize content to speed up load time.

Communication: It can be used for extranet publishing where it communicates to a firewall server used internally in the organisation. Thus providing extranet access to certain functionalities while the server is kept behind the firewalls.

Web server Acceleration: By reducing load on the we server and also by SSL hardwares.

Cache static content: This is by caching graphic content, pictures and other static content.

DDoS Mitigation Using Reverse Proxies

DDOS mitigation can be defined as strategies employed in attempt to curb or reduce Distributed denial of service attacks (DDOS) on the net linked to the internet. The mitigation can be done by running network traffic through scrubbing filters. This requires correctly identifying human traffic from robots by analyzing signatures and examining IP addresses, javascript and other attributes. Since the reverse proxy sits between the client and the actual server, it acts an intermediary improving the bandwidth consumption by caching content. This can prevent DDOS attack in that; domains with DNS records are used to map IP addresses. For example domain AAA.com has “A” DNS records which would resolve to its IP 123.123.123.123 allowing attackers to take IP and DDOS it. Multiple reverse proxies are set up where the domain sits behind to mitigate the attacks in that if one chooses to DDOS AAA.com only one reverse proxy will go down. Therefore, DDOS-protected reverse proxies could be applied to mitigate attacks. Nginx can be passed down as a reverse proxy to mitigate DDOS attack, specifically Apache DDOS attack. Nginx is deployed as a reverse proxy in front of the Apache system and by tuning some variables in Nginx small DDOS attacks are withstood.
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A Good Private Proxy Server for Internet Privacy

There are men and women who would likely state that the private proxy server is one of the best proxy servers there exists to increase successfully your Online security. Coming from the phrase by itself, it’s a private server, to be used solely by an individual or possibly a very few Internet users (that may be appearing as an individual entity). The advantages of this amazing kind of proxy server enumerated below.

Firstly, with only one or possibly a handful of members using the server, you will enjoy top possible speed capacity when in comparison to any public proxy, which in turn is often widely used by a large number of Internet surfers simultaneously.

Several other added benefits concerning the proxy server include safeguard of private information and personal privacy over the internet. The proxy server will switch all of our IP Address each and every time we log in and mask our real IP. This enables us actually to surf anonymously over the internet. Hence, we can surf the world-wide-web without worrying about hacker threats, safely shop online and also check out our most-liked online websites. You can get easily also guarantee ourselves of safe internet banking along with financial transactions. You can furthermore keep our Internet service provider or ISP from keeping track of each of our web history and recording each of our tracks. Search engines like Google along with other Internet surfers will also be kept from obtaining our personal information.

An additional advantage associated with the anonymous proxy server is that often those who are tied-down in his or her countries to access the online world or perhaps to visit some websites. With the help of several proxy servers located at diverse locales, we can easily often overcome a lot of these restrictions.

Additionally, there is also the problem of connecting to the Internet via a hotspot or simply WiFi. Using a public connection to the web such as this, Internet users nearby can take a look at your online surfing activities. Along with a private proxy server, nonetheless, you’re sure to be protected from these folks and establish a safe and secure tunnel with regards to all your personal web browsing activities.
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Public Proxies & Security

Proxy Definition

A proxy server is an intermediary machine or application, installed between a client and the final server. This system filters the client requests, acting as intermediary.

When a network client computer, needs access information or a resource, the proxy server is the machine that makes the communication, and transferring the result to the initial client.

Proxies were invented to confer structure to distributed systems. Its purpose is to allow Internet access to all computers in a system when you can only have a single connected device, ie, a single IP address.

Proxy servers can do all kinds of useful things. They can improve security, enhance performance, and save money. And because they can see all the HTTP traffic, proxies can monitor and modify the traffic.

Public proxies

A proxy server can be dedicated to a single client o shared among many clients; proxies shared among numerous clients are called public proxies. Most proxies are public, shared proxies. It’s easier to administrate and more cost effective a centralized proxy. Also some proxy applications such as catching proxy servers become more useful when several users are directed in to the same proxy, because it’s possible to take advantage of common request between clients.

When your PC is configured to use a public proxy, the browser simply sends its entire Web content request to the proxy, instead of sending the request directly to the destination Web site. The public proxy then does the DNS resolution, connects to the destination site, and returns the information to the browser. Blocking this behavior its simple, when you attempt to access a blocked site, the name of the site is contained in the request and the filters work as if the browser wasn’t configured. Continue reading Public Proxies & Security

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