Builds triggered using per-project token via the API provided by this plugin show their remote host as '127.0.0.1' rather than the real IP the build was started from. In my case, I ran curl(1) to trigger the build from another machine, and it still shows up as 127.0.0.1 (localhost), see attached screenshot.
I am accessing this Jenkins instance via an Apache reverse proxy so that I can use SSL. But I believe my Apache virtual host is configured properly to set proxy headers like X-Forwarded-For, etc. (per http://httpd.apache.org/docs/trunk/mod/mod_proxy.html). My Apache config includes the following:
Is Jenkins not respecting the X-Forwarded-* HTTP headers when determining the remote IP? That may be the root cause here.