Configure Traffic Proxying¶

To process the HTTP requests, Wallarm uses the web and proxy server NGINX
with additional modules to analyze the traffic.

To configure the proxying and filtering rules, you must:

1. Edit the NGINX configuration files.

2. Set up the filter node for using a proxy server.

3. Restart NGINX.

1. Edit the NGINX Configuration Files¶

The etc/nginx/conf.d directory contains NGINX and Wallarm filter node configuration files.

By default, this directory contains the following configuration files:

• The default.conf file defines the configuration of NGINX.

• The wallarm.conf file defines the global configuration of Wallarm filter node.

• The wallarm-status.conf file defines the Wallarm monitoring configuration.

You can create your own configuration files to define the operation of NGINX and Wallarm. It is recommended to create a separate configuration file with the server block for each group of the domains that should be processed in the same way.

To see detailed information about working with NGINX configuration files, proceed to the official NGINX documentation.

Wallarm directives define the operation logic of the Wallarm filter node. To see the list of Wallarm directives available, proceed to the Wallarm configuration options page.

A Configuration File Example¶

Let us suppose that you need to configure the server to work in the following conditions:

• Only HTTP traffic is processed. There are no HTTPS requests processed.

• The following domains receive the requests: example.com and www.example.com.

• All requests must be passed to the server 10.80.0.5.

• All incoming requests are considered less than 1MB in size (default setting).

• The processing of a request takes no more than 60 seconds (default setting).

• Wallarm must operate in the monitor mode.

• Clients access the filter node directly, without an intermediate HTTP load balancer.

To meet the listed conditions, the contents of the configuration file must be the following:

    server {
      listen 80;
      listen [::]:80 ipv6only=on;

      # the domains for which traffic is processed
      server_name example.com; 
      server_name www.example.com;

      # turn on the monitoring mode of traffic processing
      wallarm_mode monitoring; 
      # wallarm_instance 1;

      location / {
        # setting the address for request forwarding
        proxy_pass http://10.80.0.5; 
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      }
    }

2. Set up the Filter Node for Using a Proxy Server¶

You need to assign new values to the environment variables, which define the proxy server used, to configure Wallarm node for using your proxy server.

Add new values of the environment variables to the /etc/environment file:

• Add https_proxy to define a proxy for the https protocol.

• Add http_proxy to define a proxy for the http protocol.

• Add no_proxy to define the list of the resources proxy should not be used for.

Assign the <scheme>://<proxy_user>:<proxy_pass>@<host>:<port> string values to the https_proxy and http_proxy variables.

• <scheme> defines the protocol used. It should match the protocol that the current environment variable sets up proxy for.

• <proxy_user> defines the username for proxy authorization.

• <proxy_pass> defines the password for proxy authorization.

• <host> defines a host of the proxy server.

• <port> defines a port of the proxy server.

Assign a "<res_1>, <res_2>, <res_3>, <res_4>, ..." array value, where <res_1>, <res_2>, <res_3>, and <res_4> are the IP addresses and/or domains, to the no_proxy variable to define a list of the resources which proxy should not be used for. This array should consist of IP addresses and/or domains.

The example of the correct /etc/environment file contents below demonstrates the following configuration:

• HTTPS and HTTP requests are proxied to the 1.2.3.4 host with the 1234 port, using the admin username and the 01234 password for authorization on the proxy server.

• Proxying is disabled for the requests sent to 127.0.0.1, 127.0.0.8, 127.0.0.9, and localhost.

https_proxy=http://admin:01234@1.2.3.4:1234
http_proxy=http://admin:01234@1.2.3.4:1234
no_proxy="127.0.0.1, 127.0.0.8, 127.0.0.9, localhost"

3. Restart NGINX¶

After saving the edited configuration file, restart NGINX:

sudo service nginx reload

Perform the checking to see that the filter node is operational and filters traffic. See
Check the filter node operation.