Hi Peter,
Set the file settings on the extension, as Richard explained.
Example 48 (Tagging) has an example log file in the dictionary, and an example global variable for the file name.
Then run the exe, make sure to select the radio option "screen and disk" and do some requests. You'll see the log file in the apps \log folder. (not \web\log).
With regard to Richards other suggestions, with regard to embed code, that has to do with logging other events, other than just requests. He speciafically wanted to see "connections" opening and closing, and also illegal requests (which are not passed to the handler.) Because he could see these in his firewall logs, he wanted to see if they were getting to the server.
In the 6.28 build of the Tagging example, I've added embed code to the WebServer to show this sort of logging as well.
Be aware that logging to disk can easily consume your available disk space, unless you take steps to keep the volume of log history under control.
Cheers
Bruce