Samba

Samba is a free software re-implementation of SMB/CIFS networking protocol, released under the GNU General Public License.

Samba (smb/cifs) and iptables

If you have a firewall and wish to open it up to Samba on a specific machine (i.e. a single IP address), try the following iptables:

-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p tcp -m tcp --dport 137 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p udp -m udp --dport 137 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p tcp -m tcp --dport 138 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p udp -m udp --dport 138 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p tcp -m tcp --dport 139 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p udp -m udp --dport 139 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p tcp -m tcp --dport 445 -j ACCEPT
-A FORWARD -s xxx.xxx.xxx.xxx/24 -d xxx.xxx.xxx.xxx -p udp -m udp --dport 445 -j ACCEPT

where -s is your "source" IP address and -d is your "destination".

Note that,

• TCP/UDP 137 (NETBIOS Name Service aka netbios-ns)
• TCP/UDP 138 (NETBIOS Datagram Service aka netbios-dgm)
• TCP/UDP 139 (NETBIOS session service aka netbios-ssn)
• TCP/UDP 445 (Microsoft Naked CIFS aka microsoft-ds; Win2k/XP)

Test-mount your Samba share

As root,

mount -t cifs //xxx.xxx.xxx.xxx/path /mnt/samba -o username=username

Automount a Samba share

If you would like to automount your Samba shares, you can place the line below in your /etc/fstab:

//xxx.xxx.xxx.xxx/path /mnt/samba cifs username=username,password=password 0 0

where cifs might need to be smbfs, depending on your filesystem setup.

However, if you do not want your username and password in a text file that anyone can read, you can create a file in, for an example, /etc/samba/smbpasswd with the following two lines:

username=username
password=password

Then,

chmod 600 /etc/samba/smbpasswd

Now, edit your /etc/fstab and replace the line with:

//xxx.xxx.xxx.xxx/path /mnt/samba cifs credentials=/etc/samba/smbpasswd 0 0

External links

• Official Samba Web Site
• Using Samba 2nd ed. licensed under GFDL
• Setting up Samba
• File and Printer sharing using Samba on Suse Linux
• Configuring Windows Vista to map drives to Samba Shares
• "Samba beats Windows", a study comparing the two
• wikipedia:Samba
• wikibooks:Samba

Firewall

• UDP 2399 (port)