What is Open Proxy, Open Proxy in Detail

What is Open Proxy?

An open proxy is a proxy server that is accessible by anyone on the Internet. Usually, a proxy server allows users within a network group to store and forward internet services such as DNS or web pages to reduce and control the bandwidth used by the group. With an open proxy, however, any Internet user can use this forwarding service.

What are the Advantages of Open Proxy.

open proxies allow a user to hide your IP address from the access service, as it is possible to use other equipment in order to hide one’s identity and / or location. This is sometimes used to abuse or disrupt the access service, which could violate their terms of service or some laws, open proxies, so often seen as a problem. However, anonymous open proxies increase the user’s anonymity or security when browsing the Web or use other Internet services: the real IP address of a user can be used to help deduce information about that user as part of an attempt crack team. Furthermore, open proxies can be used to circumvent efforts at Internet censorship by governments or organizations. Several websites offer constantly updated lists of open proxies.

Some Disadvantages of using Open Proxy

It is possible for a computer to function as an open proxy server without the computer owner knowing. This may be due to misconfiguration of proxy software running on your computer, or infection with malware (viruses, trojans or worms) designed for this purpose. If it is caused by malware, the infected computer is known as a zombie computer.

There are hundreds of thousands of open proxies online. This is rarely a matter of misconfiguration, in most cases an open proxy is unknown to the owner of the server. Using an open proxy can be legally dangerous: the current law in Germany, for example, makes it illegal to access a computer or network without the owner’s knowledge, even if the proxy is not password protected.There no reason to run a clean open proxy for an organization, so any open proxy is suspect. The main sign of an open proxy is the legal fact that the connection is not anonymous.

Running an open proxy is a high risk to the server operator, providing an anonymous proxy server can cause real legal problems for the owner. These services are often used to disrupt foreign computer systems, usually consumed through proxies, and illegal content is likely to occur through such intermediaries. Also, as a proxy may cause the use of a high-bandwidth, resulting in increased latency to the subnet and the violation of the limits of bandwidth. A wrongly configured proxy can allow open access to a private subnet or DMZ: This is a high security concern for any company or home network, because the teams that normally are out of danger or firewall can be directly attacked.

Many open proxies very slowly, sometimes below 14.4 kbit / s, or even below 300 bits / s, while other times the speed can vary from fast to slow every minute. Some, such as PlanetLab proxies, run faster and deliberately created for public use.

Because open proxies are often implicated in the abuses, a number of methods have been developed to detect and to refuse service to them. IRC networks with strict usage policies automatically test client systems for known types of open proxies. Similarly, a mail server can be configured to automatically test mail senders for open proxies, using software such as ProxyChecker. Increasingly, mail servers are configured in the box to consult various DNSBL servers to block spam, some of the DNSBLs also list open proxies

Legal Issues

Some governments are particular about the types of sites people visit  e.g Great Firewall of China, which often employ followers who scan IPs recovery of the sources of proxy, and those that appear in the scan has been flagged for a reviewer to live to see what the user sees proxy, so depending on the sites you visit, I could get a visit from his local agency law enforcement for investigation.

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