Re: The Problem with Passive Mode ftp server

From: Ken Kauffman (kkauffman_at_nospam.headfog.com)
Date: 07/22/03 

Date: Tue, 22 Jul 2003 12:45:03 -0400

"Ken Kauffman" <kkauffman@nospam.headfog.com> wrote in message
news:XPdTa.16704$zd4.10176@lakeread02...
|
|
| "Alan Po" <alan@alanpro.com> wrote in message
| news:bfjkgk$q3v$1@hfc.pacific.net.hk...
| | Dear all
| |
| | I have set up a ftp server by using Proftp. Since I am using a router to
| | connect to the Internet with an ADSL modem, I have turn on the Passive
| Port
| | of the ftp server and use the port forwarding in my router.
Unfortunately,
| | it fail! I have tried to connect to the ftp within my local network and
it
| | work. I also make sure that my setting on the router is OK because I am
| | curretly using SERV-U (also turn on the passive mode) and everything is
| ok.
| | Furthermore, the login screen on the ftpclient show that my router can
| | locate (port forward) to a correct server but fail to establish a data
| | channel.
| |
| | Anyone can give me some idea or solution? Please help since I really
want
| to
| | build a Linux environment to replace any M$ server in my network.
| |
| | Thanks a lot
| |
| | Alan Po
| |
| | alan@alanpro.com
| |
| |
|
| I do not believe you can use passive when using NAT. Switch to PORT.
|
| ken k

Are you definitely connecting to SERV-U in passive mode? or does your
client negotiate for supported protocol? (ncftp will do this). Also, don't
forget to port forward port 20 as well as 21.

ken k

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