samba - Oct 2024 - Could not find a suitable mechtype in NEG_TOKEN_INIT error in libsmbclient 4.19.4

>>> Hi,
>>>
>>>
>>> [global]
>>>         workgroup = SAMBA
>>>         security = user
>>>         passdb backend = tdbsam
>>>         client max protocol = SMB3
>>>
>>
>>I think this all down to Samba raising the default lowest SMB protocol
>>to '2' at 4.11.0
>>
>>As this is the client, libsmbclient will read /etc/samba/smb.conf and
>>anything found there will override its defaults which on 4.10.x will
>>have been these:
>>
>>client ipc max protocol = SMB3_11
>>client ipc min protocol = NT1
>>client max protocol = SMB3_11
>>client min protocol = CORE
>On the 4.19 request, the server response is below.
>
>
>Frame 372: 308 bytes on wire (2464 bits), 308 bytes captured (2464
>bits) on interface any, id 0
I was looking at a different server. In 4.19, the response from the same
server is below, which still does not work. And I dont see any different at
all in server response between 4.10 vs 4.19 libsmb requests.

Frame 197: 380 bytes on wire (3040 bits), 380 bytes captured (3040 bits) on
interface any, id 0
Linux cooked capture v1
Internet Protocol Version 4, Src: 10.213.83.50, Dst: 192.168.1.135
Transmission Control Protocol, Src Port: 445, Dst Port: 49716, Seq: 1, Ack:
237, Len: 312
NetBIOS Session Service
SMB2 (Server Message Block Protocol version 2)
    SMB2 Header
    Negotiate Protocol Response (0x00)
        [Preauth Hash:
e3a0c4ad26291cf1362416fd3145e0548ae0202cc675ea09b14127d7253e887d60faa35d773f1e1308f930cf52e6cfd08e4a2ea855812c3ab0d5e378a74badb4]
        StructureSize: 0x0041
        Security mode: 0x01, Signing enabled
        Dialect: SMB 3.1.1 (0x0311)
        NegotiateContextCount: 2
        Server Guid: 1d1584b9-bf7c-4bc5-b11f-67c1bc1ef0cd
        Capabilities: 0x0000002f, DFS, LEASING, LARGE MTU, MULTI CHANNEL,
DIRECTORY LEASING
        Max Transaction Size: 8388608
        Max Read Size: 8388608
        Max Write Size: 8388608
        Current Time: Oct 24, 2024 19:12:57.532179700 India Standard Time
        Boot Time: Aug  7, 2023 10:11:38.342574400 India Standard Time
        Blob Offset: 0x00000080
        Blob Length: 120
        Security Blob [?]:
607606062b0601050502a06c306aa03c303a060a2b06010401823702021e06092a864882f71201020206092a864886f712010202060a2a864886f71201020203060a2b06010401823702020aa32a3028a0261b246e6f745f646566696e65645f696e5f5246433431373840706c
            GSS-API Generic Security Service Application Program Interface
                OID: 1.3.6.1.5.5.2 (SPNEGO - Simple Protected Negotiation)
                Simple Protected Negotiation
                    negTokenInit
                        mechTypes: 5 items
                            MechType: 1.3.6.1.4.1.311.2.2.30 (NEGOEX -
SPNEGO Extended Negotiation Security Mechanism)
                            MechType: 1.2.840.48018.1.2.2 (MS KRB5 -
Microsoft Kerberos 5)
                            MechType: 1.2.840.113554.1.2.2 (KRB5 - Kerberos
5)
                            MechType: 1.2.840.113554.1.2.2.3 (KRB5 -
Kerberos 5 - User to User)
                            MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP -
Microsoft NTLM Security Support Provider)
                        negHints
                            hintName: not_defined_in_RFC4178 at please_ignore
        NegotiateContextOffset: 0x000000f8
        Negotiate Context: SMB2_PREAUTH_INTEGRITY_CAPABILITIES
        Negotiate Context: SMB2_ENCRYPTION_CAPABILITIES


Regards,
Manu