You have installed Filezilla server and tried to start it. From the logs, you find out that the following error has happened :

“FileZilla Server version 0.9.33 beta started
Initializing Server.
Creating listen socket on port 21…
Failed to create listen socket on port 21
Server not online.”

What to do ?


Port 21 is already being used. Thats why Filezilla server can’t bind on it.


1. Find out who is using it. Execute the following command in command prompt

$ netstat -abn

look for mention of “21” in its output.

If you get “inetinfo.exe” associated with 21, it means that IIS server is running on your machine and he is listening on port 21. Disable IIS from running his FTP server.

2. Stop IIS FTP server

Control Panel -> Administrative Tools -> Internet Information Server -> right click on FTP -> Stop

source: noctunabsas

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6 responses

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Great info, just what I needed. Thanks!

October 28, 2009 6:15 am

Thank you so much, very useful

November 25, 2009 9:31 pm

thanks! works like a charm !

January 6, 2010 9:39 am

wauuu…thanks for the usefull information

February 26, 2010 1:57 pm

it worked…
Great help..

April 5, 2010 9:23 am

thanks. worked perfectly

August 4, 2010 2:58 am

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