RE: Active proxy 'problems'

> -----Original Message-----
> From: N. Coesel [mailto:nctnico@cistron.nl] 

> 
> This setup seems to work quite well, but there is one major 
> drawback: There seem to be active proxies at the client side. 
> This means that more and more sites will refresh their caches 
> every 24 hours. This results in a huge amount of wasted 
> bandwith since no-one (= a person) at the client side 
> actually requested the document.

What do you mean by 'active proxy'? Is that something that pre-fetches 
documents just in case a user may ask for it?
Do you know what user-agent is provided in those requests?