Such as: in 21 port, can download the file, the port is my local corresponding outside web address

000245) 2016/3/23 15:50:21 - (not logged in) (183.131.104.19) & gt; The USER jiafei
(000245) 2016/3/23 15:50:21 - (not logged in) (183.131.104.19) & gt; 331 the Password required for jiafei
(000245) 2016/3/23 15:50:21 - (not logged in) (183.131.104.19) & gt; PASS * * * * * *
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 230 Logged on
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; TYPE I
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 200 Type set to I
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; PORT 183131104,19,218,230
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 200 the Port command successful
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; The SIZE/nanjing write CARDS project files/write card project files/version. CSV
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 213, 24395,
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; RETR/nanjing write CARDS project files/write card project files/version. The CSV
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 150 Opening data channel for file download from the server of "/nanjing write CARDS project files/write card project files/version. CSV"

Switch to other ports, such as: 8885, the port is one of my local network address, this address must download
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; PORT 192168,10,96,140,220
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 200 the Port command successful
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; The SIZE/nanjing write CARDS project files/write card project files/version. CSV
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 213, 24395,
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; RETR/nanjing write CARDS project files/write card project files/version. The CSV
(000245) 2016/3/23 15:50:21 - jiafei (183.131.104.19) & gt; 150 Opening data channel for file download from the server of "/nanjing write CARDS project files/write card project files/version. CSV"
(000245) 2016/3/23 15:50:32 - jiafei (183.131.104.19) & gt; 425 Can 't open data connection for transfer of "/nanjing write CARDS project files/write card project files/version. The CSV"
(000244) 2016/3/23 15:50:42 - jiafei (183.131.104.19) & gt; 421 the Connection timed out.

What reason, how change the port, the outside my local network address to the corresponding web address?