Does the transparent can't work in FreeBSD?

[jinge]

Hi,all!


We use haproxy and FreeBSD for our cache system. And we want to use the 
transparent option 
http://cbonte.github.io/haproxy-dconv/configuration-1.5.html#4-option%20transparent
 which for some compatiable things.
But found it doest work. Here is the configure which worked in Ubuntu.


frontend tcp-in
        bind :2222 
        mode tcp
        log global
        option tcplog

        #distingush HTTP and non-HTTP
        tcp-request inspect-delay 30s
        tcp-request content accept if HTTP

        default_backend Direct   


backend Direct
        mode tcp
        log global
        option tcplog
        no option httpclose
        no option http-server-close
        no option accept-invalid-http-response
        option transparent 


Can anyone tell my if is the FreeBSD can not support transparent here or my 
configure is not correct ? And how to make transparent work right.

Thanks!


Regards
Jinge