how can i populate cs-username in log files?

[blackrabbit]

I have some public websites on my server that a anyone can get to plus some other things like images on myspace and stuff hosted on my server so when people go to the myspace pages it also logs stuff in my iis logs.

My question is, is there a way to have iis populate the cs-username field in the logfiles with the username of who ever is logged onto the pc accessing my sites? I get the ip's but the cs-username is always blank. Do I have to turn on some sort of integrated Widnows Authentication and stuff like that? I don't want users to have to use a login prompt to get to my stes, I just want to see the "names" and not just ip's of people visitng my site.

I guess I could do it with some asp.net code but that only helps on the asp.net sites and not when someone accesses say myspace which then accesses images hosted on my server.

 

[jet042]

If you could actually get that information I would be scared. As far as I know, you can only get the user name if you require authentication. From the documentation on W3C Exctended Logging:

The name of the authenticated user who accessed your server. Anonymous users are indicated by a hyphen.

 

[blackrabbit]

Yeah it would be scary. I spent all weekend looking for a way but it looks like the only way is to require authentication which isn't the way I want to do it. Oh well.