Limit number of concurrent connections in apache
 

I have a Cent4 server that has an ISO I make available for download. I limit the bandwidth via iptables (okay, actually tc with qdiscs and classes) to keep from burying my 'net connection. Problem I run into now is that I look at my connections in 'netstat -an' and I see that 1 IP address has 20+ connections which I assume are downloads in progress, especially since even in SSH it displays text like my old 110 baud days.
Anyway, not being an Apache guru, what settings would I need to check and change to limit the number of concurrent connections a client can make? I don't mind 5 or so, but 20+ is ridiculous.
Thanks!

http://dominia.org/djao/limitipconn.html
http://www.web-development-blog.com/...ds-per-client/

Thanks for those. I used the first link for my Cent4 server and am very happy now.