[Rack] port 21 is closed

Jonathan Lassoff jof at thejof.com
Mon Feb 21 01:29:51 PST 2011


On Mon, Feb 21, 2011 at 1:17 AM, Patrick Keys <citizenkeys at gmail.com> wrote:
> Is there a reason why port 21 is closed at Noisebridge?  I went to
> upload a bunch of photos to http://gallery.noisebridge.net and the ftp
> program wouldn't work.

Sorry, this wasn't intentionally being blocked. The OpenBSD
firewall/routers redirect TCP/21 traffic to a local proxy to support
active-mode FTP connections (where the remote server connects back on
TCP/20 for the data channel, kinda old school/ghetto)

Unfortunately, this proxy wasn't running (nor was it set to start!). I
fixed this up, and it should be working now.

> so its not something with the wifi routers.

The WiFi APs are only APs that bridge Ethernet frames back and forth
to the wired network -- they are performing no routing operations.

Sorry for any confusion.

Cheers,
jof


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