Firewall problem, big problem

[007007]

Hi,

I spotted a big problem in the firewall ispconfig3, let me explain:

- I installed the server, I installed ispconfig3, I set it up after I enabled the firewall
- I reboot the system, it works
- After I created a client, client's website and FTP
- When I want to connect to FTP client's that does not work, i get this message in flashfxp :

SSH-2.0-OpenSSH_5.1p1 Debian-5
QUIT
Protocol mismatch.

(the root shell works)

- I did a reboot, it does not work, the server is down

the server ping internally but not externally. Now the only solution is to restore everything

you know why this problem? any fix for that ?

thx