Created FTP (markdown)

FTP.md

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+How to connect to an ftp server hosted inside xqemu
+===================================================
+Writing files to your Xbox's HDD is currently a pain. It will be easy once the
+fatx driver has write capabilities, but until then you have the option of
+connecting over FTP to a server hosted inside xqemu.
+
+Run xqemu as normal, but add option to forward to port 21 inside VM as follows:
+
+	-net nic,model=nvnet -net user,hostfwd=tcp:127.0.0.1:8081-:21
+
+It's assumed you're using Filezilla. If not, look for the respective settings in
+your client. Fire up Filezilla and set the following options:
+
+Filezilla > Settings > Connection > FTP > Active mode
+
+	Active mode IP, "Use tho following IP address:" 10.0.2.2
+
+	Make sure "Don't use external IP address on local connections." is NOT checked
+
+Then create your new "Site" with IP address 127.0.0.1 and port 8081. Under Transfer Settings, check Active.
+
+Details for the curious
+-----------------------
+FTP has two modes, passive and active.
+
+Passive mode involves the client first connecting to the server for control and
+then again on another port other for data. The client first connects, then the
+server gives it another address and port to connect to for data. The first
+problem with this is that the server reports to the client the only IP address
+that it knows (10.0.2.15) which is not correct for our needs--we need 127.0.0.1.
+That's alright because we can override this in Filezilla. The second problem is
+that we don't know which port the server is going to choose, so we can't forward
+it ahead of time.
+
+In active mode, the client first connects to the server, then the server
+connects to the client! The client needs to give the IP address for the server
+to connect to. By default, it will give your computer's IP address, but the
+guest cannot connect to using that IP. So instead we need to override this
+setting and provide the IP address that the guest should connect to to actually
+connect to the host, which is 10.0.2.2.