>Ah ok - I was always a little hazy on what passive mode did exactly. So
>it just means that the remote server won't make a return connection to
>send data.
Well it's not so much the direction of data transfer as who waits for a
data connection. Traditional mode goes like this:
> dir
-> port a,b,c,d,e,f (client says I'm at this address and port)
<- (server says ok)
(server connects to client and data transfer happens)
Passive mode goes like this:
> dir
-> pasv (client says you tell me where to connect)
<- (server replies with address and port)
(client connects to server and data transfer happens)
Obviously traditional mode is no use if the client sends a private
untranslated address. Note that the address is sent in the control
connection and a translator has to reach in and modify the address.
You can see all this by enabling debug in ftp.
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