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[centaurcon]

I am setting up a Filezilla server inside a DFL-800.  we are using FTPS and it works from a computer inside the network.

From outside, I get to the point were the client shows Initializing TLS...

The server says connected sending welcome message, but nothing ever arrives, including the certificate.

What am i missing?

[silver_surfer30]

Hello I find this explanation quite good.
Have a look at it.

http://geekswithblogs.net/Lance/archive/2005/08/23/50912.aspx

That should help solving the issue.

But that cause security breach. You need to be aware of it .

[centaurcon]

Thanks for the reply Silver_surfer30, however the information in the post is information already known to me...

I have setup FTPS at another clients in the past, and it worked great.  Set it to use PASV as a connection and spesified a port range in filezilla server and forwarded the same ports from the NAT to the server.  Outside clients connected fine.

I am trying to get the same thing to work here.  However I can't quite seem to get it to work correctly.

in fact, I can't get any PASV connection to work through the NAT.  I can however get a standard Active FTP connection on port 21 to work, however as soon as I try to do something as simple as change the port, (at client, server and NAT firewall) then the system fails.  The FTP sever registeres a login, but the welcome message or directly listing is unable to be delivered.

It is very frustrating.

[xavierbt]

Could you post your dfl-800 ftp server configuration ?

[chechito]

for ftp traffic maybe try the ftp alg's