I'm trying to understand one thing with regards to transparent FTP proxy (via WCCPv2) and passive-mode FTP.
I realize that ACNS and routers have a special service group "60", which is used for native-ftp. However their documentaion is suspiciously lacking any technical details with regards to what traffic is sent to the cache-engine.
What I was looking to find out is:
When WCCP negotiates what traffic to redirect, typically the cache-engine tells the router what ports to redirect. Knowing that passive-FTP uses dynamic ports, does "service-group 60" somehow force the WCCP router to send all TCP ports to the ACNS cache-engine? Or is WCCP somehow stateful enough to only send the dynamically negotiated passive ports (which is hard to believe)?
Thanks for any and all help!