The purpose of a reverse proxy is to shield an application server from direct internet access. An Apache web server with the Core Rule Set, as shown in Tutorial 7 (Including the Core Rule Set).An Apache web server with ModSecurity as shown in Tutorial 6 (Embedding ModSecurity).An Apache web server with extended access log as shown in Tutorial 5 (Extending and analyzing the access log).An Apache web server with SSL/TLS support as shown in Tutorial 4 (Configuring an SSL server).Understanding of the minimal configuration from Tutorial 2 (Configuring a minimal Apache server).An Apache web server, ideally one created using the file structure shown in Tutorial 1 (Compiling an Apache web server).If you take a short cut, it will probably need some tweaking with paths and predefined aliases. You do not really need all of these, but if you follow them diligently, I am sure all the examples will work 1:1. The following is a recommended set of requirements. We will start by looking at the normal setup using ProxyPass and will afterwards discuss other options using ModRewrite. There are also several ways of getting the proxy process going in Apache. We will not be discussing other methods of communication such as FastCGI proxy or AJP here. In this tutorial we will be restricting ourselves to the normal HTTP-based mod_proxy_http. More importantly, there are multiple ways of communicating with the application server. There are a number of ways for converting an Apache server into a reverse proxy. On the way back it is in turn the last instance in which the responses can be checked one last time. In a staggered defense spanning three levels, the reverse proxy or to be technically correct, the gateway server, provides the first look into the encrypted requests. This is referred to as a three-tier model. This in turn is connected to a database server located in yet another layer.
It conducts a security check on the HTTP payload and forwards the requests found to be good to the application server in the second layer. Only the reverse proxy is exposed to the internet. Why are we doing this?Ī modern application architecture has multiple layers. In doing so, we’ll become familiar with several configuration methods and will be working with ModRewrite for the first time. We are configuring a reverse proxy protecting access to the application and shielding the application server from the internet.
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Table of Contents What are we doing? Why are we doing this? Requirements Step 1: Preparing the backend Step 2: Enabling the proxy module Step 3: ProxyPass Step 4: Proxy stanza Step 5: Defining exceptions when proxying and making other settings Step 6: ModRewrite Step 7: ModRewrite Step 8: Balancer Step 9: RewriteMap Step 10: Forwarding information to backend systems Step 11 (Goodie): Configuration of the complete reverse proxy server References License / Copying / Further use What are we doing?
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