Comment 6 for bug 456808

@emarkay:

Yes that is the first step

You should just able to do sudo ufw allow samba as well. Also assuming that all three of your computers are apart of the same workgroup. What does /var/log/samba/log.smbd and /var/log/log.nmd say (if you can attach those as well) Also can you attach the output of testparm

Thanks
chuck