Hello,
I have a problem that I cannot find solution so far and I kindly ask for your opinion. Reading the forums didn't help me.
I have the 320-l and Asus router RT-N65U. Here are the setups of both:


I am using ASUS Dynamic Domain Name System.
My problem is when I try to UPLOAD files to the ftp no matter if in same network or outside one, I get timed out connection, get disconnected every 20-30 seconds and cannot upload anything. Attention: I can DOWLOAD with no problems at all. Using FileZilla:
Status:	Connecting to ****:21...
Status:	Connection established, waiting for welcome message...
Status:	Logged in
Status:	Starting upload of E:\*.rar
Status:	Retrieving directory listing of "/Volume_1/"...
Command:	TYPE I
Response:	200 TYPE is now 8-bit binary
Command:	PASV
Response:	227 Entering Passive Mode (****)
Command:	MLSD
Response:	150 Accepted data connection
Response:	226-Options: -a -l 
Response:	226 20 matches total
Command:	PASV
Response:	227 Entering Passive Mode (****)
Command:	REST 85349804
Response:	350 Restarting at 85349804
Command:	STOR *.rar
Response:	150 Accepted data connection
Error:	Connection timed out after 20 seconds of inactivity
Error:	File transfer failed after transferring 16 515 072 bytes in 22 seconds
Status:	Disconnected from server
Status:	Resolving address of ****.asuscomm.com
Status:	Connecting to ****:21...
Status:	Connection established, waiting for welcome message...
Status:	Logged in
Status:	Starting upload of Y:\*.rarHere are the FZ settings, using Passive mode and Binary file transfer





Any clues why my connection drops for upload and works on downlods? Thanks in advance!