samba - Apr 2022 - how to know SMB protocol versions supported by a host

Hi,

Under linux you can run something like this:

nmap -p139 --script smb-protocols <server-address>

it will report something like:

PORT??? STATE SERVICE
139/tcp open? netbios-ssn

Host script results:
| smb-protocols:
|?? dialects:
|???? 2.0.2
|???? 2.1
|???? 3.0
|???? 3.0.2
|_??? 3.1.1

Cheers.

On 4/6/22 11:32, Piviul via samba wrote:
> I have a little problem using samba; I have a bash script that should 
> mount some LAN hosts shares. Some of these hosts support only SMB1 
> protocol. If I try to mount a share on a host that support only SMB1 
> without specifying the protocol to use or specifying SMB3 or SMB2 the 
> mount command seems to freeze; if I specify on the options vers=1 all 
> seems to works.
>
> There is a way to know the SMB protocol version supported by a host?
>
> Piviul
>
>
-- 
Thibault Roulet

On 06/04/22 14:33, Thibault Roulet via samba wrote:
> Hi,
>
> Under linux you can run something like this:
>
> nmap -p139 --script smb-protocols <server-address>
>
> it will report something like:
>
> PORT??? STATE SERVICE
> 139/tcp open? netbios-ssn
>
> Host script results:
> | smb-protocols:
> |?? dialects:
> |???? 2.0.2
> |???? 2.1
> |???? 3.0
> |???? 3.0.2
> |_??? 3.1.1
Great Thibault, but not here :(
> $ nmap -p139 --script smb-protocols 192.168.64.2
>
> Starting Nmap 7.40 ( https://nmap.org ) at 2022-04-07 09:27 CEST
> NSE: failed to initialize the script engine:
> /usr/bin/../share/nmap/nse_main.lua:816: 'smb-protocols' did not
match
> a category, filename, or directory
> stack traceback:
> ?? ?[C]: in function 'error'
> ?? ?/usr/bin/../share/nmap/nse_main.lua:816: in local
'get_chosen_scripts'
> ?? ?/usr/bin/../share/nmap/nse_main.lua:1271: in main chunk
> ?? ?[C]: in ?
>
> QUITTING!
it's an old server that should connect to? some cifs hosts in the best 
way. Have you another suggestion?

Piviul