Hi Jinge,
> if it's not the HTTP traffic we send it to the Internet use the option > transparent. I'm not sure I understand this configuration. Can you clarify what services you are offering and what it has to do with transparent proxying? Looks to me like you use "option transparent" to transform HAProxy into a forward proxy, but HAProxy really is a reverse proxy only. > But We found there are lots of HTTP traffic in the Direct Backend,which > shouldn't be there. Reproduce the problem, start HAProxy in debug mode, and post the debug output of a session which erronously goes to the direct backend. I suspect its not valid HTTP and therefor goes to the "direct" backend. Also post the output of "./haproxy -vv". Regards, Lukas