The latest insights from the load balancing experts | Loadbalancer.org

X-Forwarded-For Header (XFF)

Learn the ins and outs of this useful tool for identifying client IPs.
NGINX and X-Forwarded-For Header (XFF) Dave Saunders
The X-Forwarded-For Header is a simple yet powerful solution to a very common problem. I'm not sure why, but for some reason it also seems to cause a lot of confusion. NGINX is often deployed

3 min read

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Stunnel X-Forward-For (XFF) with HAProxy and the PROXY Protocol Rob Cooper
When using proxies such as stunnel and HAProxy it's easy to loose track of the client source IP address. This occurs for example when HAProxy is used in it's default configuration to load balance a

3 min read

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Apache and X-Forwarded-For Header (XFF) Rob Cooper
It's easier to get Apache to log client IP addresses utilizing X-Forwarded-For Headers than it is using IIS. By default, the logs do not record source IP addresses for clients - but as of Apache

4 min read

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IIS and X-Forwarded-For Header (XFF) Rob Cooper
Although it's not technically a standard, the X-Forwarded-For (XFF) header is incredibly useful if you have any kind of proxy in front of your web servers. What's the issue? When you load balance your website

4 min read

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