how the security is be? `neccesary user or domain/workgroup for sec`
then for this all clients in a domain or is must be workgroup member
for this you may be in write fstab with option like `credentials=/home/.smbpasswd `
mount point is like in your cleint fstab
`/yourservername/sambasharename /testdir cifs credentials=/home/myhomedirectory/.smbpasswd 0 0`
and your .smbpasswd file must be to contains
username = tesuser
password = yourpassword
mount -t cifs //yourservername/sambasharename /testdir/ -o user=testuser
smbpasswd -a testuser (use this password is your credentials while mount samba share)