Solved

Error 425 when connecting to FTP server inside local network

Posted on 2004-08-25
8
293 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
  • 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
New My Cloud Pro Series - organize everything!

With space to keep virtually everything, the My Cloud Pro Series offers your team the network storage to edit, save and share production files from anywhere with an internet connection. Compatible with both Mac and PC, you're able to protect your content regardless of OS.

 

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

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Sometimes you might need to configure routing based not only on destination IP address, but also on a combination of destination IP address (or hostname) and destination port number. I will describe a method how to accomplish this with free tools. …
A common practice in small networks is making file sharing easy which works extremely well when intra-network security is not an issue. In essence, everyone, that is "Everyone", is given access to all of the shared files - often the entire C: drive …
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…

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

22 Experts available now in Live!

Get 1:1 Help Now