This action gets created automatically by the BFI server when a new catalog is uploaded. You can generate a fixlet from the BFI web UI on the Management -> Upload Catalog page. Hover the mouse pointer over the question mark icon.
Save the resulting Fixlet, catalog_download.bes, so you can open it with the BigFix Console. You’ll see that the action script of this fixlet will include the BFI server’s IP address in the prefetch commands.
If the URL’s were copied correctly in your original post, then 188.8.131.52 would seem to be your BFI server’s IP address. Perhaps the network is misconfigured on your BFI Server?