FTP stopped working externally in SBS 2008

I have the following set up in a small office:

-SBS 2008
-FTP with IIS 7
-2 internal IP Addresses
-ftp port forwarded to an external ip address
- firewall is on bu has ftp enabled

I had my ftp working fine and suddenly it stopped working externally. My users can access it through its IP address and DNS name (ftp.mycompnay.com) internally but their customers cant externally.

I can ping its DNS name (ftp.mycompany.com) extrenally but cant connect to it.

I thought that maybe there was an IP conflict with both internal IPs but disabling one (which is used by other ISP) did not help.

Any ideas? Thanks!
Argie_ITAsked:
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mikeadaCommented:
did you try turning the firewall off to test temporarily?

By FTP is enabled you mean that the port for FTP is enabled?  There are ususally two places to configure it in the firewall, one is the NAT to make sure that the port for FTP is forwarded to appropriate internal IP and the other is the Firewall settings itself to make sure that it's able to pass thorugh the firewall.
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Argie_ITAuthor Commented:
I meant ftp port is enabled and also included as exception in the firewall.
After playing around for a while I got it working and this is what I did:

- Disable second network connection (which has a different ISP)
-Open cmd prompt as Administrator
-Type netsh advfirewall set global StatefulFtp enable to re-enable it in the firewall
-It worked!

But, honestly, I dont feel too confident about it and I am not sure what did it... wonder if the second IP address was conflicting? or re-enabling the ftp in firewall?
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mikeadaCommented:
just be glad it's working and make a note of what you did for next time!  that's what I do. lol.
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