Redirect FTP traffic which used random port.

Hi All,

I want to redirect FTP traffic which used random wild ports to specific ftp_pool. I am trying to create a iRule like this;

when CLIENT_ACCEPTED {
        TCP::collect
}
when CLIENT_DATA {
        set payload [TCP::payload]
        binary scan $payload cSS rtype sslver rlen
        if { $payload contains "????????" } {
                pool ftp_pool
        }
        TCP::release
}

I think...I need to assign some value to "????????" Anybody have a iRule or the link related?

Thanks Mia.