[Samba] [smbclient] Fails sending pop-up message with -M

[Jeremy Allison]

On Wed, Sep 29, 2021 at 05:52:17PM +0200, Gilles via samba wrote:
>On 29/09/2021 17:40, Jeremy Allison wrote:
>>On Wed, Sep 29, 2021 at 05:03:54PM +0200, Gilles via samba wrote:
>>>Hello,
>>>
>>>From Debian 9 running Samba 4-5-16, I'd like to send a pop-up 
>>>message to a Windows (7) host, but none of the following works:
>>>
>>>smbclient -M \\WIN-PC "test"
>>>smbclient -M //WIN-PC "test"
>>>smbclient -M ////WIN-PC "test"
>>>smbclient -M '\\WIN-PC' "test"
>>>
>>>Would someone have a working example?
>>>
>>>FWIW, the Windows host is running a Comodo firewall. Would I need 
>>>to allow connection to a given TCP/UDP port?
>>
>>-M messaging is an SMB1-only thing I believe. Is the Windows7 box 
>>running an SMB1 server ?
>
>I don't know what an SMB1 server is. Is it a service I need to run on 
>the Windows host?

Yes, but you really shouldn't :-).

https://techcommunity.microsoft.com/t5/storage-at-microsoft/stop-using-smb1/ba-p/425858