What do ProxyRequests do?

What do ProxyRequests do?

ProxyRequests are a special type of cache-buster in the Apache webserver.

These requests contain a special parameter called Proxy-Non-Authoritative-Ip, which tells Apache to not follow the IP address in the request. It looks like this:

When you send a request to the webserver with the IP 127.0.1, the Apache webserver will look at the IP 127.1, as you can see below, and if that IP is the same as your local machine, the webserver will respond with the cached version of the page:

This can be helpful, for example if you have a local intranet webserver, but it is down, and you want to avoid accessing the webserver. The ProxyRequests parameter can be used to skip it completely, which gives you direct access to the webserver.

When you send a request with the IP 127.1, this parameter will tell the webserver to respond directly with the version of the page from the webserver.

How to set up ProxyRequests? You can set up a .htaccess file that contains the following: This sets up the ProxyRequests, so you don't have to set this up every time you start the webserver. How to use ProxyRequests? You can use the ProxyRequests parameter to skip the cache busting. In other words, when you request a URL that has been cached, the ProxyRequests parameter will make the webserver not look at the IP in the request, but instead make it directly request the page from the webserver.

For example, let's say that you have a webserver at When you visit the webserver will make a request to the webserver for this page, and it will return the cached version of the page. This is shown below: Now, let's say that you make a request to If you make the ProxyRequests parameter, Apache will make the webserver directly request the page from the webserver.

What is an Apache proxy used for?

There are two types of proxy servers available to us: 1.

reverse proxy, 2. Forward proxy.

What is a reverse proxy server? Reverse proxy is the server which can be placed in front of other servers and it forwards the incoming requests from user/end-user/client/web browser to the back-end server(s). So the reverse proxy server can be inbuilt or external. In built reverse proxy is sometimes called as a Load Balancer and the external reverse proxy is sometimes called as a reverse proxy.

So the common functions of a reverse proxy server are: User access control to web site resources. Load balancing of web servers. Proxying requests to other servers. Content caching. What is a forward proxy server? Forward proxy is the server which can be placed in between clients/users and the web sites. It translates all the incoming requests from client/user into the requests to web server(s) and vice-versa.

How it works? Let's say if you type www.google.com in your web browser. This request goes through the proxy server, which translates this request into a request to google.com server.

But this proxy is not a generic proxy, it is specific to the websites/content provided by the company for which it is configured. And each company has their own design, coding etc. So it is not possible to configure such proxy using configuration files.

But now we have HTTP protocol which allows to do everything using HTTP headers. In HTTP, there is a request line (method), header (key/value pairs), body (request line) and a response line (status code/reason phrase). So we can configure the proxy to act as a general purpose protocol converter.

How to configure a proxy for HTTP requests? There are many applications which support HTTP requests via HTTP proxy. For example, WinSCP is one such application. There are 3 modes of proxy:

HTTP, no CONNECT method supported. HTTP with CONNECT method supported. SOCKS4/5 proxies. This is the best option if you want to configure a proxy to translate HTTP to non-HTTP requests.

What is the proxy protocol in Apache?

Proxy Protocol in Apache.

The Proxy Protocol is a mechanism for HTTP proxy servers to communicate with each other and with the web server they proxy. It defines how proxy server clients and web servers communicate with each other over the network.

The Proxy Protocol is defined in two places: the client-side of the HTTP protocol and the server-side of the HTTP protocol. The proxy clients do not use the HTTP protocol directly, but must use a proxy protocol to talk to the proxy server.

The HTTP protocol includes a number of mechanisms to ensure that the proxy server will know who the web server is talking to. The Proxy Protocol is one of these mechanisms.

For the most part, the proxy server uses the HTTP protocol in the same way that a browser or web server would. However, there are some differences between a proxy server and a web server.

The main difference is that a proxy server sits between the client and the web server. This means that a request from the client to the web server must pass through the proxy server. As such, the proxy server has the ability to modify the request and send it back to the web server.

This allows a web server to provide information about itself to the proxy server before any requests are sent. A web server can tell the proxy server to provide the web server's name, IP address, etc. In order for the web server to be recognized.

In addition, a web server can give a proxy server a list of authorized clients. A web server can specify that a certain set of clients can access a web page and then specify a list of IP addresses, ports, etc. That are allowed to access that web page.

There are two types of clients: clients who are known and clients who are anonymous. Clients who are known are those who are already authenticated by the web server. A user name and password, for example, could be used to authenticate a client.

Anonymous clients are clients who are not authenticated by the web server. They are clients who must provide a username and password in order to access a web page.

The Proxy Protocol does not define how the proxy server determines if a client is authenticated. As such, it is up to the individual proxy server to decide how it authenticates clients.

How to configure proxy in Apache?

I want my users to be able to access internet via proxy.

So in Apache I configured following proxy address; ProxyPass / %backURL%.

ProxyPassReverse / %backURL%. But when users enter ip address(in URL) from outside network(eg. 192.168.1, etc.) then we get "Error 404" error. Is there any solution?
Here is httpd.5.1:8005
# ServerAlias www.example.com:8887
ProxyPassReverse / %backURL%. ProxyHTMLURLMap / %backURL%. . ProxyPass / ajp://192.1:8111/ . . ProxyPass allows only IP addresses, so you need ProxyPassReverse. If you use it, %BACKURL% will be replaced with browser's address.