What am I to make of this? Very strange! Seems to be a "real" browser since it retrieved all the images on that page (http://stout.rumble.net/gallery/).

I have DNS lookups switched on, but there is no fw0 I can see from DNS on my linode...

fw0 - - [09/Jun/2004:16:28:25 +0100] "GET /albums/JamieJenHouse/P4060026.highlight.jpg HTTP/1.1" 200
 11528 "http://stout.rumble.net/gallery/" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"

Possibly related, the next entry after these is a FQDN:

fw01.lamp.ac.uk - - [09/Jun/2004:16:29:56 +0100] "GET /stuff/glastotix.jpg HTTP/1.1" 200 13949 "http://www.rumble.net/blog/index.cgi/music/index.html" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"

Anyone who has control over their reverse IP can make it anything they would like to--matching forward DNS is solely at the whim of the administrator. If you want to have Apache do reverse DNS lookups, you'll have to live with a few entries from IPs with poorly managed DNS.

-- James