thanks Maciej, i tring haproxy,in below situation,LB forward http header to A,B,C,C, but how about the Web Server response the client's, the response data still through then LB1?that the point, LB1 only have 10M bandwidth as Web Servers, in my situation,clients need download big-flash file about 5M, i need web server response the client directly, sorry to say it again, i need confidence!

192.168.1.1 192.168.1.11-192.168.1.14 192.168.1.2 -------+-----------+-----+-----+-----+--------+---- | | | | | _|_db +--+--+ +-+-+ +-+-+ +-+-+ +-+-+ (___) | LB1 | | A | | B | | C | | D | (___) +-----+ +---+ +---+ +---+ +---+ (___) haproxy 4 cheap web servers

Best Regards,Wenew