username=MYUSER
password=MYPASS
domain=DOMAIN

[root@localhost ~]# smbclient -L //share.domain.com -E -A /root/.credentials
Domain=[BERCO_NT_DOM1] OS=[Windows 5.0] Server=[Windows 2000 LAN Manager]
...

Connection to share.domain.com failed (Error NT_STATUS_IO_DEVICE_ERROR)
NetBIOS over TCP disabled -- no workgroup available

[root@localhost ~]# mount.cifs //share.domain.com/folder/folder2 /root/shared -o 'credentials=/root/.credentials,sec=ntlmv2' -v
domain=domain.com
mount.cifs kernel mount options: ip=172.16.70.4,unc=\share.domain.comfolder,sec=ntlmv2,user=MYSUER,,domain=domain.com,prefixpath=folder2,pass=********
mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)