The IP address for logging is the source IP address. There are several ways to find it. XFF headers, for example, can be printed out showing a record of all packages delivered to a specific address. They can then slice and dice the data to see who sent the packages, and who received them. This method is also useful in determining patterns of “good” and “bad” traffic, and comparing them with other sources of data.

XFF header is the source IP address for logging

A web server can use the XFF header to identify the source IP address of a request. This information is useful for logging and blocking purposes. The source IP of the request may be set to be trusted or not trusted. A trusted proxy may decide to keep this information for its own use, while an untrusted proxy may choose to forward the XFF header to the endpoint web server.

In addition, an XFF header can be used to identify which IP address a client is using to access a website. Usually, the IP address is recorded in the logs. This feature is available in most application servers. A load balancer can also use this header to identify the source IP address of a website. To enable this feature, you must configure IIS so that the source IP address of the client is recorded in the logs.

The XFF header is required for many web applications. For instance, logging into a member area requires the IP address of the user. Ezoic routes all requests through Amazon Cloud Servers, so the Ezoic IP address will appear in the access logs.

The XFF header is an HTTP header field that identifies the IP address of the client connecting through a load balancer or HTTP proxy. This header is commonly used in web hosting scenarios where a proxy is used, and the system must log the actual IP address of the client.

If you want to insert the XFF header into a HTTP request, you can use the XFF header insertion option in BIG-IP Application Security Manager. By inserting the XFF header into HTTP headers, you can block clients from using the IP address for spoofing.

In addition to tracking malicious traffic, logging the original IP address of the client makes it easier to track down the source of malicious traffic. You can also use this method to identify an infected client by looking at the URL Filtering log. If you find it, you can then investigate the corresponding malicious traffic.

Apache supports conditional logging based on the X-Forwarded-For header. For example, you can add the X-Forwarded-For header to log HTTP requests in a conditional manner based on environment variables. For instance, you can set the environment variable “forwarded” to use a conditional logging method based on the source IP address.