How-to get anonymous FTP to use port 6021

Matthew Seaman m.seaman at
Mon Feb 16 12:55:08 PST 2004

On Mon, Feb 16, 2004 at 02:56:34PM -0500, JJB wrote:
> How can I tell the inetd anonymous ftp server to listen on an
> different port other that 21.
> I tried adding port 6021 in the /etc/services file but that did not
> work.

Don't change the default ftp port number in /etc/services -- instead
add your own line, eg:

    mycustomftp    6021/tcp

Then add a line lie so into /etc/inetd.conf:

    mycustomftp    stream  tcp     nowait  root    /usr/libexec/ftpd       ftpd -l

and restart inetd:

    # kill -HUP `cat /var/run/`

Note that this may well result in port 6020 being used for the FTP
data channel -- you'll need to make sure your firewall rules permit



Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
PGP:         Marlow
Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
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