[Samba] smb client v4. against samba server 3.x

[Andrea Zagli]

hi

i'm using debian sid

samba version 4.11

today trying to connect to samba server 3.x stopped to work

i'm quite sure that the problem is the deprecation of smbv1

indeed i can mount a share using the option vers=1.0 in mount.cifs

but i cannot use smbclient to browser the server; i get error on  
protocol negotiation

i tried using -m SMB2 and NT1 but without success

and also nautilus doesn't work (i found on internet that it fixes  
using "max|min client protocol = SMB2" in smb.conf but not for me)

what could be the problem?

thanks in advance