networking - Cannot connect to Mac computer via smb in Ubuntu 16.04 - Ask Ubuntu

i cannot connect computers on network running ubuntu 16.04. stuck in neverending username , password dialog loop forever.

i can ssh machine, , can mount in filesystem using ssh://hostname/share.

i know question duplicate, known solutions have not worked me.

i tried adding

client use spnego = no

to /etc/samba/smb.conf file, below says global (line 29).

that caused different error, "failed retrieve share list server. connection timed out."

smbclient //host/share -u <username>:  ntlmssp packet check failed due short signature (0 bytes)! ntlmssp ntlm2 packet check failed due invalid signature! session setup failed: nt_status_access_denied 

any ideas?

i can connect servers on network fine. right issue seems mac computers. (i haven't had occasion try connect windows machine).

i'm new ubuntu, unsure else try offhand.

i have same problem using xubuntu 16.04 , mac 10.11.6. best answer find https://discussions.apple.com/thread/7589427?start=0&tstart=0

if using smb el capitan apple have implemented new change intended enhance security. involved signing network packets. smb clients cannot cope feature although expect linux machine running recent version of samba4 able to. may require enabling matching option in samba. possible turn feature off on mac server doing following.

sudo defaults write /library/preferences/systemconfiguration/com.apple.smb.server signingrequired false 

and

writing following /etc/nsmb.conf

[default] signing_required=no 

however, still cannot access mac smb share linux.

current workaround use afp protocol , netatalk according this guide