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

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

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