cfml

We're occasionally seeing *cgi.remote_addr* come through as 'unknown', just wondering why/how this happens?

In most cases, the CF engine's defer to the HttpServletRequest object like so
```request.getRemoteAddr()```

I would start by calling that method on the actual servlet request (you can get from the page context) to see if it is coming form the servlet that way

and then inspect the HTTP request headers for clues.

Specifically any `x-forwarded-for` header, which could be overwriting it

Hi Dave,

Looks like Brad beat me to it :)

Without knowing more detail about your web server, I would first check the availability of cgi.http_x_forwarded_for.

If it is available use that, otherwise use cgi.remote_addr.

Hope that helps.

We're using ACF2023 (standard install), IIS10, Win 2022.

A value of "unknown" for `cgi.remote_addr` seems odd. You would expect an IP address or an empty string.

Does your server do DNS lookup, for example, by means of the attribute `enableLookups="true"` in the connectors in `server.xml`? If so, switch over to `&lt;connector ... enableLookups="false" /&gt;` and see what happens.