07-12-2023, 07:20 AM
Proxy servers and tunneling
When navigating through different networks of the Internet, proxy servers and HTTP tunnels are facilitating access to content on the World Wide Web. A proxy can be on the user's local computer, or anywhere between the user's computer and a destination server on the Internet. This page outlines some basics about proxies and introduces a few configuration options.To get more news about proxy online, you can visit pyproxy.com official website.
There are two types of proxies: forward proxies (or tunnel, or gateway) and reverse proxies (used to control and protect access to a server for load-balancing, authentication, decryption or caching).
![[Image: 72dc21f8d293c9fc792d54b13b47ff92.jpg]](https://qq-juhe-foreign-station.oss-cn-hongkong.aliyuncs.com/20230705/72dc21f8d293c9fc792d54b13b47ff92.jpg)
Forward proxies
A forward proxy, or gateway, or just "proxy" provides proxy services to a client or a group of clients. There are likely hundreds of thousands of open forward proxies on the Internet. They store and forward Internet services (like the DNS, or web pages) to reduce and control the bandwidth used by the group.
Forward proxies can also be anonymous and allow users to hide their IP address while browsing the Web or using other Internet services. For example, Tor routes internet traffic through multiple proxies for anonymity.
Proxies can make requests appear as if they originated from the proxy's IP address. This can be useful if a proxy is used to provide client anonymity, but in other cases information from the original request is lost. The IP address of the original client is often used for debugging, statistics, or generating location-dependent content. A common way to disclose this information is by using the following HTTP headers:
HTTP tunneling
Tunneling transmits private network data and protocol information through public network by encapsulating the data. HTTP tunneling is using a protocol of higher level (HTTP) to transport a lower level protocol (TCP).
The HTTP protocol specifies a request method called CONNECT. It starts two-way communications with the requested resource and can be used to open a tunnel. This is how a client behind an HTTP proxy can access websites using SSL (i.e. HTTPS, port 443). Note, however, that not all proxy servers support the CONNECT method or limit it to port 443 only.
When navigating through different networks of the Internet, proxy servers and HTTP tunnels are facilitating access to content on the World Wide Web. A proxy can be on the user's local computer, or anywhere between the user's computer and a destination server on the Internet. This page outlines some basics about proxies and introduces a few configuration options.To get more news about proxy online, you can visit pyproxy.com official website.
There are two types of proxies: forward proxies (or tunnel, or gateway) and reverse proxies (used to control and protect access to a server for load-balancing, authentication, decryption or caching).
Forward proxies
A forward proxy, or gateway, or just "proxy" provides proxy services to a client or a group of clients. There are likely hundreds of thousands of open forward proxies on the Internet. They store and forward Internet services (like the DNS, or web pages) to reduce and control the bandwidth used by the group.
Forward proxies can also be anonymous and allow users to hide their IP address while browsing the Web or using other Internet services. For example, Tor routes internet traffic through multiple proxies for anonymity.
Proxies can make requests appear as if they originated from the proxy's IP address. This can be useful if a proxy is used to provide client anonymity, but in other cases information from the original request is lost. The IP address of the original client is often used for debugging, statistics, or generating location-dependent content. A common way to disclose this information is by using the following HTTP headers:
HTTP tunneling
Tunneling transmits private network data and protocol information through public network by encapsulating the data. HTTP tunneling is using a protocol of higher level (HTTP) to transport a lower level protocol (TCP).
The HTTP protocol specifies a request method called CONNECT. It starts two-way communications with the requested resource and can be used to open a tunnel. This is how a client behind an HTTP proxy can access websites using SSL (i.e. HTTPS, port 443). Note, however, that not all proxy servers support the CONNECT method or limit it to port 443 only.
