Table of Contents

Ubuntu - Samba - Test Samba’s ability to authenticate users

Test using an invalid username and password

smbclient //sharewiz/share -U user1%secret

returns: 

Domain=[SHAREWIZ] OS=[Windows 6.1] Server=[Samba 4.3.9-Ubuntu]
tree connect failed: NT_STATUS_ACCESS_DENIED

Test using a valid username but with an incorrect password

smbclient //sharewiz/share -U validuser%incorrect_password

returns: 

session setup failed: NT_STATUS_LOGON_FAILURE

Test using a valid username with a valid password

smbclient //sharewiz/share -U validuser%correct_password

returns: 

Domain=[SHAREWIZ] OS=[Windows 6.1] Server=[Samba 4.3.9-Ubuntu]
smb: \>

NOTE: If smbd is able to successfully authenticate the login name/password pair and that user is authorized to access the requested share, we are greeted with an smb: \> prompt.

  • If the user was correctly authenticated, but could not access the request service, smbclient reports that the tree connect failed: ERRDOS - ERRnosuchshare.
    • This is where an invalid sharename has been specified, which can be caused by a misspelled share name, permissions on the share which restrict the user in question from accessing that directory or printer, or a bad path statement in the share’s definition as given by smb.conf.

Exit smb

smb: \> exit