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From Vinicius Carvalho <vinicius.carva...@sambatech.com.br>
Subject Re: FTP Server Ports
Date Mon, 05 Oct 2009 18:42:31 GMT
Thanks Niklas. Just found the docs, we are opening a few passive ports now.


On Mon, Oct 5, 2009 at 3:30 PM, Niklas Gustavsson <niklas@protocol7.com>wrote:

> On Mon, Oct 5, 2009 at 8:19 PM, Vinicius Carvalho
> <vinicius.carvalho@sambatech.com.br> wrote:
> > Hello there! We recently moved our FTP Server based on Apache FTP server
> > from one node to other. The TCP port for incoming requests is 2121. We
> > opened this on the firewall, but the remote user is unable to list files.
> > One can connect to the server, send login information, but listing is not
> > working. After stopping the firewall the listing worked fine, I wonder if
> > there's another port we need to open.
> Listing files (as well as downloading/uploading) happens on a separate
> port. For active connections, this port is chosen by the client, thus
> people who want to use FTP over firewalls therefore commonly disables
> active connections. For passive connections, you can specify in
> FtpServer (look in the data connection configuration) which ports
> FtpServer should offer. Make sure you also open these in the firewall.
> Note that in the current versions of FtpServer, we only support one
> concurrent connection per passive port. Thus, if you want multiple
> users to connect concurrently, you need to open multiple ports.
> /niklas

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