Passive FTP on PPPoE connection
- From: "Arjan Gijsberts" <arjang@xxxxxxxxxxxxx>
- Date: Wed, 6 Apr 2005 17:27:40 +0200
Since a couple of months I've been using IIS 6 as my FTP server on a PPPoE
connection. This setup however has given me headaches for a while now, so I
hope someone here can help me out of these problems.
The problem is that I can't seem to connect from the internet using passive
FTP. I've traced the problem to the 227 command, which returns my local IP
address (in the NAT setup). E.g.: '227 Entering Passive Mode
(10,2,2,101,6,215).', whereas 10.2.2.101 is my private IP address. Sometimes
a reboot could fix the problem, so that the 227 command would return my
public IP address. RRAS would then automatically arrange NAT and firewall
settings, so in those cases it worked like it should. However, a reboot is
far from problem solving and rebooting takes quite a while on the machine.
My current setup is like this: The server obtains a public IP using PPPoE
(using a raspppoe created connection, this works fine however). I use RRAS
for the basic firewall and for NAT. The problem occurs with and without the
firewall, so I am sure that the firewall can't cause any problems. I've
enabled the FTP service in RRAS, which should take care of everything like
forwarding port 20, forwarding the passive port and taking care of the
firewall for these ports.
Hopefully someone here knows how to deal with IIS 6 Passive FTP in a NAT
situation. Perhaps someone could give some more information about the FTP
part of the NAT 'engine', since I find there is very few information on that
topic.
TIA
A. Gijsberts
.
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