mounting CIFS share (tcp/445) with FreeBSD and mount_smbfs(8)

Martin Smith lists at
Wed Mar 2 18:49:44 UTC 2016

On 02/03/2016 05:02, O. Hartmann wrote:
> Hello list.
> I need to mount a CIFS share from windows server 2012 r2 via CIFS, tcp/445 as NetBIOS
> service (tcp/139) has been deprecated due to serious vulnerability issues.
> Until the disabling of NetBIOS and tcp/139 we used successfully autofs and mount_smbfs.
> this is no longer working. I tried to force autofs/mount_smbfs to bind to port 445 on the
> server via ://, but this doesn't work.
> Trying to mount a share from a samba 4.3 server (FreeBSD CURRENT, net/samba43, both most
> recent sources), where I configured samba_server via smb ports = 445 to use port tcp 445
> only and only SMB2 and SMB3 (server min protocol = SMB2) protocols via the following
> command:
> mount_smbfs -I -U a_user -W \
> WORKGROUP //a_user at /mnt
> results in the error
> mount_smbfs: unable to open connection: syserr = RPC struct is bad
> Setting "smb ports = 139,445" and "server min protocol = NT1" seems to work, the share
> can be bound, but this is SMB over tcp/139 and not CIFS.
> I desperately need CIFS and I need tcp/445 since tcp/139 is from now on firewalled.
> So: what do I miss here?
I think this is a windows server problem, though I am not in a position 
to make any useful suggestions
except to say that I am continually coming up against similar problems 
with windows machines as well
sorry I cant be any more help

> Kind regards and thank you in advance,
> O. Hartmann
> P.S. Please CC me

More information about the freebsd-questions mailing list