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Posted to ftpserver-users@mina.apache.org by Vinicius Carvalho <vi...@sambatech.com.br> on 2009/10/05 20:19:42 UTC
FTP Server Ports
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.
Regards
Re: FTP Server Ports
Posted by Vinicius Carvalho <vi...@sambatech.com.br>.
Thanks Niklas. Just found the docs, we are opening a few passive ports now.
Regards
On Mon, Oct 5, 2009 at 3:30 PM, Niklas Gustavsson <ni...@protocol7.com>wrote:
> On Mon, Oct 5, 2009 at 8:19 PM, Vinicius Carvalho
> <vi...@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
>
Re: FTP Server Ports
Posted by Niklas Gustavsson <ni...@protocol7.com>.
On Mon, Oct 5, 2009 at 8:19 PM, Vinicius Carvalho
<vi...@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