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Strange international FTP issue

finbarqs

Diamond Member
I have an FTP server, in which people can upload and download just fine without any issues. Now someone from Australia want to send me something, but for some reason they cannot.


220 Welcome to XXXX FTP; Server Ready
> 331 Password required for bgt12.
> Password:
> 230 User bgt12 logged in.
> Remote system type is UNIX.
> Using binary mode to transfer files.
> ftp> put test2.txt
> local: test2.txt remote: test2.txt
>
> 421 Service not available, remote server timed out. Connection closed.
> 200 Type set to I.


does anybody know why?

I can connect with an outside connection and upload just fine. Friends can as well..

but when someone from Australia is trying to connect, they get that error message.
 
FTP active/passive issue?
I think it has it has nothing to do with Australia but with the client/server negotation
 
The problem client is likely going through some sort of network or port address translation (NAT/PAT). Be it on their end, or as it happens some times, in their provider.
 
the server is on a T-1 connection, and the different ISP's i've used is verizon DSL and Verizon FIOS. Both Verizon connections. Other connections throughout the country has no issues connecting via PASV mode.
 
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