Solved

Able to FTP in cmd line but not windows

Posted on 2009-05-07
5
558 Views
Last Modified: 2012-05-06
I am trying to connect to a host using windows based ftp clients I need to find out where the problem exists  Here is what I can and connot do.
1. I can ftp to some hosts but not others using filezilla, dreamweaver and contribute
2. I can ftp in cmd mode to all hosts.  Tested on 2 PCs 1 XP one Vista
3. I can ftp to all hosts using all programs when I switch to another ISP (Leave the building and connect on other network)
4. My NAC says it is not blocking my IP address.  I believe this is verified because I can connect in DOS
5. The error message says I am unable to connect to server.  This is immediate before I have a chance to send credentials.

I need to start updating files from this site.  thanks for any help

John
0
Comment
Question by:ajohnpeters
  • 3
  • 2
5 Comments
 
LVL 1

Accepted Solution

by:
sryckman earned 500 total points
ID: 24330772
It sounds like your firewall or the ftp sites allow active ftp but not passive ftp.   The Windows command line client uses active ftp in which it sends everything back and forth like a "pipe" on the incoming connection.   Ie: The replies from the server go back on the same socket that initiated the request.   This is considered something not favored upon by network people because there is a direct link between the two sites .    Some sites however use passive ftp and in that mode every request into the server initiates a new outbound packet from the server to the client.   The clients firewall has to support this return connection coming in.   Likewise if the ftp server is behind a firewall doing network address translation then the firewall at the ftp server site must support passive ftp as well or the source IP will be the internal network IP of the server and not the public IP address.
0
 

Author Comment

by:ajohnpeters
ID: 24331080
I believe I use passive to another ftp host, and I use passive to the affected host when connecting through the other ISP.  (I may have my client set to determine best mode.)

I am not at the site where I am having problems.  I will relay the info and get the information.

Thanks, and I will keep you posted.
0
 

Author Comment

by:ajohnpeters
ID: 24336837
I tried filzilla in passibe mode and it failed.  I then forced it to go to active mode, and it appears to be using the wrong IP.  I am going over ther now, and I will try the direct ip address.
0
 

Author Comment

by:ajohnpeters
ID: 24343670
The problem ended out being a DNS problem.  If I connect via IP directly I could work in active mode.  If I used the domain name I could not use active mode.  the site was called do-over....com which was a test site.  The www and the do-over were on a other network, while the systems were on the same on the base network.  It may seem confusing, but it kind of works.

John
0
 
LVL 1

Expert Comment

by:sryckman
ID: 24343997
Glad you found an answer, not sure why DNS would effect it in this way but if it works, it works.
0

Featured Post

What Should I Do With This Threat Intelligence?

Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

Join & Write a Comment

by Nathan Brom/Bromy2004 Introduction There are numerous websites out there for any different type of program you can imagine.  Of those, you'll need to decide which ones are legitimate and aren't trying to steal your money or infect your comput…
INTRODUCTION The purpose of this document is to demonstrate the Installation and configuration of the Data Protection Manager product. Note that this demonstration was prepared on the basis of Windows OS is 2008 R2 and DPM 2010. DATA PROTECTI…
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
In this video, we discuss why the need for additional vertical screen space has become more important in recent years, namely, due to the transition in the marketplace of 4x3 computer screens to 16x9 and 16x10 screens (so-called widescreen format). …

757 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now