[aklug] Re: FTP

FTP operates on two separate channels: a control channel (usually port 21),
and a data channel (usually port 20 for "active" FTP). The data channel is
used to return results from most of the useful commands, and to actually
transfer data.
See the accepted answer on this article for a more detailed explanation with
specific iptables recommendations:
http://serverfault.com/questions/38398/allowing-ftp-with-iptables

m.

On Wed, Jun 22, 2011 at 4:07 PM, Damien Hull <damien@linuxninjas.tv> wrote:

> I'm trying to setup an FTP server.
>
> Ubuntu
> Proftpd
> Works from windows comand shell
> (if you can call that a shell)
>
> I'm trying to backup cisco router configs. It doesn't work when 21 is
> open. Works fine if I open all the ports.
>
> Am I missing a port that needs to be open?
>
> Sent from my iPhone
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Received on Wed Jun 22 16:18:48 2011