Opened 18 years ago

Last modified 18 years ago

#893 closed Bug report


Reported by: blueskyib Owned by:
Priority: normal Component: FileZilla Server
Keywords: Cc: blueskyib
Component version: Operating system type:
Operating system version:


This happened to the FZ Server 0.9.8a. It seems like the
secure server partially works. I can create secure
connection(s) w/o any problem and everything works
fine if both server and client are on the same machine. I
believe it should work if the server and the client are on
different machines of the same LAN (please read on).
However, If the server is on the Internet (not behind NAT
or anything) and the client is behind NAT, I could
connect to the server but I would get a 425 cannot open
data connection error.

Here is what I found after some quick investigations:

I could see 2 connections made by the server with port
20 and 21 (I couldn’t get the 990 port working); however,
one of the connections was not correct. The wrong one
was trying to connect to the internal IP of the client,
which is not reachable from the Internet.

To reproduce:

  1. open up the settings in the server interface and go to

SSL/TLS settings

  1. check enable SSL/TLS, allow explicit SSL and Force

explicit SSL

  1. open FZ client (the version I used is 2.2.13c),

connect to the server and use FTP over SSL (explicit

  1. connecting to the server and connected well.
  2. 425 error shows up when trying to get the dir list.

Please note: the client is behind a NAT and the server
is on the Internet.


Change History (2)

comment:1 by blueskyib, 18 years ago

This bug report has been closed due to inactivity and has possibly
already been solved.

You can reopen this report if the issue still exists in the
latest version of FileZilla (Server).

comment:2 by blueskyib, 18 years ago

It is not a bug. Please ignore it!

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