Frequently Asked Questions
I'm receiving the following
error when I start Easy File Sharing FTP Server/Easy Address Book Web Server: 'Error starting
the Server. This may be due to another service running
on the port...'.
This is Server reporting that there is another application
using Port 21. There are two ways around this. First find
the application and shut it down. Please see if you are running
IIS. The second solution is to choose another port number
such as 8086, 2000, 5060, etc. Just change it on the option
tab and click the 'restart' button again.
Why my friends cannot
connect the server on my computer from their computers in
First, please connect to internet before you run this program,
then check if your friend's computer can access your computer
directly. Tell your friend to ping the IP address of your
computer. Please tell him to open a ms-dos command window.
Then type 'ping 169.254.123.179' and then press the 'enter'
key. we suppose 169.254.123.179 is the internet IP address
of your PC. If your friend can only see 'Request timed out'
on his computer, it means that your friend cannot access your
computer directly at all. There could be a firewall software
on your computer, which blocks all outside requests. Please
configure the firewall to enable the ports of Easy File Sharing
FTP Server/Easy Address Book Web Server or disable the firewall.
Every firewall is different and handles FTP requests
different. Contact the maker of the firewall to see if they
require any special settings to allow FTP traffic through
As a general rule open port 21, and a Passive Port range such
as 2000-2010. We suppose that you run Easy File Sharing FTP
Server on port 21 and setup the PASV port range from 2000
If you are a Windows XP user, please disable Internet Connection
Firewall (ICF) or manually open ports in ICF in Windows XP.
To manually open a port, follow these steps:
1. Click Start, and then click Contral Panel.
2. Under Contral Panel, click Network Connections.
3. Right-click the connection that you use for the Internet,
and then click Properties.
4. Click the Advanced tab, and then click Settings.
5. Click Add to open a new port (If your installed SP2, please
first click Advanced tab, and then click Settings under Network
6. In the Description box, type Easy File Sharing FTP Server
: Port 21.
7. In the Name or IP address of the computer hosting this
service on your network box, type 127.0.0.1.
Note You can specify the IP address of an internal computer.
But you typically will use 127.0.0.1.
8. In the External port and Internal port boxes, type the
port number of Easy File Sharing FTP Server 21. Generally,
this number is the same.
9. Click TCP, and then click OK.
You also need to open the ports 2000-2010 for PASV ports as
above if your users connect to your server with PASV mode.
Note: Your ISP may block port 21, even they block all ports
up to 1024. Please try choosing another port such as 8086
for Easy File Sharing FTP Server/Easy Address Book Web Server.
If you connect to internet via a router, please click here.
If your computer on a LAN, please click here.
How to use Easy File Sharing
FTP Server/Easy Address Book Web Server behind a router?
You need to configure the router to forward port 21 and the
PASV ports 2000-2010 to the internal IP address where Easy
File Sharing FTP Server is listening. This allows the FTP
traffic to be routed through the router and into Easy File
Sharing FTP Server. There should be options in the router
to forward these ports.
If your computer's Internal IP is 192.168.1.100, please log
into your router with a web browser(This is usually done by
entering the Internal IP address of your router 192.168.xxx.xxx
in the Address field, and pressing the Enter key), then enter
the port number 21 and the IP 192.168.1.100 on the "Forwarding"
or "Virtual server" page (suppose that you setupt
port 21 for Easy File Sharing ftp server), and then people
outside can visit your ftp server. Please note do not tell
192.168.1.100 to your friends directly because it is a Local
IP address. You should tell an Internet IP address to your
friends so they can access your files on the Internet. To
find the Internet IP address of your computer, please visit:
(Note: you cannot access your site using the Internet ip from
behind the router, it will only work from outside, so you
must use the local ip.)
For more information, please refer to the router's manual.
Each router has its own configuration method and this configuration
method is often called 'Port Forwarding, port mapping'.
configuration for Easy Address Book Web Server is similar to the
configuration for Easy File Sharing Web Server, please visit here for details.
This example shows how to add port forwards on a LinkSys router:
1. Open a browser on your computer, log into the configuration
screen with http://192.168.1.1(The default internal IP for
linksys router is 192.168.1.1), and then click on the "Advanced"
button as shown below:
2. On the Advanced page, click the "Forwarding"
button to open the port forwarding page as shown below:
3. On this screen, you can type the PASV ports, FTP port and
the internal IP Address of your computer, when you're done
setting up all the port forwards you need, click the "Apply"
button to save the settings to the router. You can now safely
close your browser.
Settings for popular hardware routers :
Forwarding on a D-Link 704P DSL/Cable Router
Forwarding on an Asante FR3000 DSL/Cable Router
for more routers settings.
I'm using Easy File Sharing
FTP Server/Easy Address Book Web Server on a LAN, my colleagues can visit my URL, but my
friends cannot visit it through internet.
If your computer is on a LAN and it connect to Internet with
a proxy software such as Sygate or Windows ICS, your friends
cannot visit your site because they cannot access your computer
directly. To let them visit your computer, please make your
computer connect to internet directly via a modem, ISDN, ADSL
and so on. Otherwise, you need to redirect the port on your
LAN gateway(the computer running proxy server) with some TCP/IP
port redirectors such as PortTunnel.
Why my users can connect, but
they cannot see directory listings or cannot download/upload
It could be that your user connect to Easy File Sharing FTP
Server with Port mode and his computer is behind the router/firewall
which blocks the data connect. Please tell him to switch his
connection type from Active (PORT) mode to Passive (PASV)
mode, please read this topic.
If your users connect to your sever with PASV mode and still
have the problem, It could be that PASV Mode on your computer
might not be setup properly and a router / firewall is blocking
the data connection. If there is a router / firewall in front
of Easy File Sharing FTP Server make sure to read this
Another common problem is that sometimes Internet Service
Providers (ISPs) prevent their customers from running FTP
servers by preventing access on the FTP port, number 21. They
"listen" to the traffic on this port and disable
directory listings or file transfers, or they disable use
of this port on incoming connections all together. Please
change the port that Easy File Sharing FTP Server listens
on from port 21 to some other less-used port number. Usually
it is best to try using ports above 1024 first, such as port
How to configure Internet Explorer
to use the FTP PASV mode?
Internet Explorer will use the Port mode by default. To configure
it to use the PASV mode, please do the following:
1. Start Internet Explorer.
2. On the Tools menu, click Internet Options.
3. Click the Advanced tab.
4. Click to select the Use Passive FTP (for firewall and DSL
modem compatibility) check box.
5. Click OK.
What's different between Port
mode and PASV mode?
FTP supports two modes. These modes are called Standard (or
PORT or Active) and Passive (or PASV). The Standard mode FTP
client sends PORT commands to the FTP server. The Passive
mode client sends PASV commands to the FTP Server. These commands
are sent over the FTP command channel when establishing the
Standard mode FTP clients first establish a connection to
TCP port 21 on the FTP server. This connection establishes
the FTP command channel. The client sends a PORT command over
the FTP command channel when the FTP client needs to send
or receive data, such as a folder list or file. The PORT command
contains information about which port the FTP client receives
the data connection on. In Standard mode, the FTP server always
starts the data connection from TCP port 20. The FTP server
must open a new connection to the client when it sends or
receives data, and the FTP client requests this by using the
PORT command again.
Passive mode FTP clients also start by establishing a connection
to TCP port 21 on the FTP server to create the control channel.
When the client sends a PASV command over the command channel,
the FTP server opens an ephemeral port (between 1024 and 5000)
and informs the FTP client to connect to that port before
requesting data transfer. As in Standard mode, the FTP client
must send a new PASV command prior to each new transfer, and
the FTP server will await a connection at a new port for each
You may have to change the mode that is used by the FTP client,
depending on the firewall configuration on either the FTP
client or the server. Microsoft Internet Explorer 5 and later
support both Standard mode and Passive mode.
Does this software support any
other web browsers such as Netscape?
It supports Internet Explorer, Mozilla, Netscape, Opera, etc.
It also supports most FTP Client which support multi-thread
downloading with resuming capability, such as CuteFTP, FlashFXP,
FTP Voyager, etc.
Easy File Sharing FTP Server support SSL?
No, Easy File Sharing FTP Server currently does not support
SSL, We recommend you use our another product Easy
File Sharing Web Server, which supports 128 bit SSL Encryption.
How can I use it on Mac or
Easy File Sharing ftp server currently can only run on Windows
system, however, from a client side, it is available to any
Windows, Mac, Linux or Unix environment.
Does my computer
need to be online?
Yes. Otherwise your friends cannot connect to your computer
and get files from your computer.
What is the largest file
size that I can upload to Easy File Sharing FTP Server?
You can download/upload a single file larger than 4 GB.
Do I need a domain for
Easy File Sharing FTP Server?
No, you don't have to. Just tell the IP Address of your computer
to your friends. You can also register a free domain at www.dyndns.org
or www.no-ip.com for your
How to make a backup of Easy
File Sharing FTP Server user accounts?
To backup the user account information, please copy all the
db files(*.sdb) to a save place. These files can be found
in the installation folder of Easy File Sharing FTP Server.
I have more questions, where
can I get additional information?
Please send your questions to email@example.com.