Solved

Error 425 when connecting to FTP server inside local network

Posted on 2004-08-25
8
299 Views
Last Modified: 2012-08-13
I have a FTP serverinside my network with a fixed private ip address and a static public IP address. The server is set up in a DMZ and I am running BlackIce. I have opened ports 20 and 21 and for PASV I have ports 50000-500049 open. Connections to the server in active and passive mode from outside my network are just fine.

Connections from all but two PC's inside my network will connect in active and passive mode but when the LIST command is issued error 425 comes up. Some have recommened making sure the MTU size is the same for all the PC's and all are set to 1300.

I am using the filezilla server and the filezilla client.

0
Comment
Question by:Sygma6
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
8 Comments
 
LVL 15

Expert Comment

by:adamdrayer
ID: 11898250
how did you open up the ports?  What OS are you using?  do you have firewall software installed?  it sounds most definately like a communication problem on the listening port.  Go to the server and try and ping the client on that port.
0
 

Author Comment

by:Sygma6
ID: 11903139
The Filezilla FTP server is in a DMZ set up by the router. All of the PC's are running Windows 2000. I opened the specific ports (20-21 and 50000-50049) in the BlackIce firewall software by allowing all connections on those ports to the server.  
0
 
LVL 15

Expert Comment

by:adamdrayer
ID: 11904454

OK.  First the router calls it's ports DMZ, because it doesn't do any port blocking with the internet.  Your private network, however, views this DMZ port as external and may be blocking ports between Internal network and DMZ.  you have to open up those ports on the router (50000-50049).  You also want to disable any software firewalls or antivirus programs temporarily.  

I'm pretty sure that's most likely it.  Your FTP server is demilitarized from the internet, but your router is still blocking ports between it and your internal network.
0
Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

 

Author Comment

by:Sygma6
ID: 11904859
I think I found out the problem. I had set the wan IP address in the passive port section if the server program and my router can not do loopbacks from wan IP's to internal IP's. I can now access the FTP server inside the network using a passive connection, but not an active one.
0
 
LVL 15

Expert Comment

by:adamdrayer
ID: 11905276
Great to hear you got it up and working!  You can request a points refund in the community support thread.
0
 

Author Comment

by:Sygma6
ID: 11906344
Ok, excellent. I can't figure out how to close these topics either.
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 13175140
PAQed with points refunded (110)

modulo
Community Support Moderator
0

Featured Post

Don't Miss ATEN at InfoComm 2017!

Visit booth #2167 to see the  new ATEN VM3200 32 x 32 Modular Matrix Switch. Other highlights include the VE8950 4K HDMI Over IP Extender, VS1912 12-Port DP Video Wall Media Player  and VK2100 ATEN Control System. Register now with Free Pass Code ATEN288!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is the first one of a series of articles I’ll be writing to address technical issues that are always referred to as network problems. The network boundaries have changed, therefore having an understanding of how each piece in the network  puzzl…
Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

705 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