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01/10/2008 at 11:47AM PST, ID: 23073663
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6.8

FTP Port Forwarding Passive Mode

Asked by Barbulescu in FTP Servers, TCP/IP, Network Routers

Tags: FileZilla, FileZilla, 0.9.25, CISCO, Router, 1720

I have setup FileZilla on a server that is behind a CISCO 1720 Router. Obviously it needs to run in passive mode using port forwarding and supporting passive connections.

What I have done is:

In FileZilla:
- assigned the real Internet IP in the passive settings
- assigned the port range 40100 - 40104
- created a test account

On the CISCO 1720 I have attempted to create the port forwarding as follows:

ip nat inside source 192.168.0.10 tcp 21 interface Ethernet 0 21
ip nat inside source 192.168.0.10 tcp 20 interface Ethernet 0 20
ip nat inside source 192.168.0.10 udp 20 interface Ethernet 0 20
ip nat inside source 192.168.0.10 tcp 40100 interface Ethernet 0 40100
ip nat inside source 192.168.0.10 tcp 40101 interface Ethernet 0 40101
ip nat inside source 192.168.0.10 tcp 40102 interface Ethernet 0 40102
ip nat inside source 192.168.0.10 tcp 40103 interface Ethernet 0 40103
ip nat inside source 192.168.0.10 tcp 40104 interface Ethernet 0 40104

When I am connecting to my real Internet IP FTP (trying to simulate as if I am connecting from outside) I get the following error: WSAECONNREFUSED (No connection could be made because the target computer actively refused it. This usually results from trying to connect to a service that is inactive on the foreign hostthat is, one with no server application running)

PS:

Connecting to the FTP using internal LAN address works perfectly, only from outside I get WSAECONNREFUSED

Looking forward to solutions.
[+][-]01/10/08 12:31 PM, ID: 20630862

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About this solution

Zones: FTP Servers, TCP/IP, Network Routers
Tags: FileZilla, FileZilla, 0.9.25, CISCO, Router, 1720
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Solution Provided By: newborn1281
Participating Experts: 2
Solution Grade: B
 
 
[+][-]01/10/08 02:40 PM, ID: 20632180

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[+][-]01/10/08 04:24 PM, ID: 20632976

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[+][-]01/10/08 10:51 PM, ID: 20634629

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[+][-]01/11/08 06:45 AM, ID: 20636671

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[+][-]01/11/08 07:07 AM, ID: 20636906

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[+][-]01/11/08 08:04 AM, ID: 20637483

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[+][-]01/11/08 08:25 AM, ID: 20637677

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