did you try port 22?

@wiak yes I tried with port 22

@elgaliamine - While logged in with your terminal, run the following

tail -f /var/log/auth.log

Then try to connect using filezilla. What errors do you get on the terminal?

Hello @wiak,

Thanks for your helps,
Bellow the errors :

    Feb 22 10:49:40 packer-ubuntu-15-10-i386 sshd[10694]: error: Hm, kex protocol error: type 30 seq 1 [preauth]

Feb 22 10:50:00 packer-ubuntu-15-10-i386 sshd[10694]: Connection closed by 105.153.81.240 [preauth]

@elgaliamine - Googled to this filezilla forum post. See if any of the solutions there solves your filezilla problem.