Port 20 is the ftp-data port.  See this excerpt from /etc/services:

ftp-data        20/tcp
ftp-data        20/udp
ftp             21/tcp
ftp             21/udp

On Wed, 16 Jan 2002, Julian Opificius wrote:

> Why's that?
> 
> j.
> ===================
> At 08:58 PM 1/16/02, you wrote:
> >You might want to open up port 20, as well.
> >
> >On Wed, 16 Jan 2002, Julian Opificius wrote:
> >
> > > Hi folks,
> > >
> > > I'm using NAT on my Cisco 678 DSL modem, to connect my real IP into my
> > > private LAN.
> > > I want to run an FTP server on my Linux box, accessible from the outside
> > > world. I know I have to open up port 21, 'cos it's the FTP control port,
> > > but do I have to open up any other ports in order to allow data transfers?
> > >
> > > julian.
> > >
> > > ----------------------------------------------------------------
> > > Just because I'm paranoid doesn't mean they aren't after me ...
> > >
> > > Julian Opificius. ICQ 3268206.
> > > ----------------------------------------------------------------
> > >
> > >
> > >
> > > _______________________________________________
> > > Redhat-list mailing list
> > > [EMAIL PROTECTED]
> > > https://listman.redhat.com/mailman/listinfo/redhat-list
> > >
> >
> >
> >
> >_______________________________________________
> >Redhat-list mailing list
> >[EMAIL PROTECTED]
> >https://listman.redhat.com/mailman/listinfo/redhat-list
> 
> ----------------------------------------------------------------
> Just because I'm paranoid doesn't mean they aren't after me ...
> 
> Julian Opificius. ICQ 3268206.
> ----------------------------------------------------------------
> 
> 
> 
> _______________________________________________
> Redhat-list mailing list
> [EMAIL PROTECTED]
> https://listman.redhat.com/mailman/listinfo/redhat-list
> 



_______________________________________________
Redhat-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/redhat-list

Reply via email to