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

[Gilles]

For some reason, I forgot to include the error message :-/

~# smbclient -M \\WIN-PC "test"
test: Not enough '\' characters in service

I tried the different versions shown below, but always get the same 
error. It doesn't look like it's the remote host that's the issue.

On 29/09/2021 18:38, Rowland Penny via samba wrote:
> On Wed, 2021-09-29 at 09:02 -0700, Jeremy Allison via samba wrote:
>> 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
>>
> Win 7 does use SMBv1, as will Samba 4.5.16 on Debian 9, so if it did
> work on those EOL things, it still should. Easiest way to find out if
> it is the firewall, temporarily turn it of and see if it works.
>
> Rowland
>
>
>