LEVEL 1– ELITE PROXIES/ HIGH ANONYMOUS PROXIES
REMOTE_ADDR = proxy IP
HTTP_VIA = not determined
HTTP_X_FORWARDED_FOR = not determined
Your proxy IP is used instead of your IP address.absolute anonymity. The server doesn’t know your real IP address and it does not know that you’re using a proxy.
HTTP_VIA = not determined
HTTP_X_FORWARDED_FOR = not determined
LEVEL 2 — ANONYMOUS PROXIES
REMOTE_ADDR = proxy IP
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = proxy IP
This type of proxies hides your real IP address but the server may know that you’re connecting over a proxy because the proxy sends additional headers such as HTTP_VIA or HTTP_X_FORWARDED_FOR. In some cases, these headers may contain your real IP address and if that’s the case, then that proxy gets marked as transparent. If one of those proxy headers contain any other IP address that’s not yours, then the proxy will still be considered to be anonymous.
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = proxy IP
LEVEL 3 — TRANSPARENT PROXIES
REMOTE_ADDR = proxy IP
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = your IP
Also known as caching proxies, make no attempt at concealing your identity. The sole purpose of transparent proxies is to cache the data that is exchanged between the servers.The web server knows your real IP addresss and it knows that you’re using a proxy.
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = your IP
Transparent Proxies (Level 3)
Transparent proxies are the type of proxies that forward detailed information about you including your IP address to the target server you are connecting to, thus it provides almost no level of anonymity. Such proxies are also known as caching proxies because their intended purpose is to cache the data that is exchanged between the servers in order to speed up the Internet within the organization.
Transparent proxies are not entirely useless for all purposes, because your IP address is still technically "hidden" from the target server, it's just that it would be very easy for them to find it out. For example, let's pretend you are using a transparent proxy which has an IP address of 123.123.123.123 and your real IP address was 133.11.76.190. In that situation, this is how your request would appear to a target server:
... HTTP_X_PROXY_ID = 1522885065 HTTP_VIA = 1.1 123.123.123.123 (Mikrotik HttpProxy), 1.1 proxy4.wasantara.net.id (squid/3.2.2) HTTP_X_FORWARDED_FOR = 133.11.76.190, 202.159.95.218 HTTP_CONNECTION = keep-alive REMOTE_ADDR = 123.123.123.123 ...
As you can see, the proxy first identifies itself as a Mikrotik HttpProxy by sending an additional HTTP_VIA header the variable REMOTE_ADDR which holds the IP address of a visitor instead shows the IP of a proxy, however it does store your real IP address inside other header variables, in this case it's inside HTTP_X_FORWARDED_FOR.
Anonymous Proxies (Level 2)
Anonymous Proxies or sometimes known as distorting proxies can provide a sufficient level of anonymity and are thus considered to be useful for most purposes. This type of proxy does not reveal your IP address to a server, however the server will know that the connection was made through a proxy because of the additional information that is sent with each request. Anonymous Proxies usually identify themselves by attaching additional headers to each request such as:
HTTP_CLIENT_IP = ... HTTP_X_FORWARDED_FOR = ... HTTP_X_FORWARDED = ... HTTP_X_CLUSTER_CLIENT_IP = ... HTTP_FORWARDED_FOR = ... HTTP_FORWARDED = ...In order for a proxy to be anonymous, none of those headers should contain your real IP address otherwise such proxy isn't considered to be anonymous, and instead it is a transparent proxy.
Elite Proxies (Level 1)
Elite or High Anonymity Proxies are considered to be the best because they provide the absolute highest level of anonymity. When using this type of proxy, the server you are connecting to has no idea that the connection was made through a proxy nor does it know your real IP address.
