[Samba] NTLMSSP NTLM2 packet check failed due to invalid signature

[Carlos A. P. Cunha]

HI!
My server Samba 4 version 4.3.0, running since August, do not is a 
problem, but my i see this messages logs every 1 minutes, any ideas?

Dec  7 10:40:24 dc-linux samba[4912]: [2015/12/07 10:40:24.260707, 0] 
../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
Dec  7 10:40:24 dc-linux samba[4912]:   NTLMSSP NTLM2 packet check 
failed due to invalid signature!
Dec  7 10:40:24 dc-linux samba[4912]: [2015/12/07 10:40:24.280740, 0] 
../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
Dec  7 10:40:24 dc-linux samba[4912]:   NTLMSSP NTLM2 packet check 
failed due to invalid signature!


Thanks!