Samba is implemented as two server daemons:
nmbd
Provides NetBIOS name server services
smbd
Provides SMB/CIFS services
The graphical configuration tool for Samba is system-config-samba .
7.1.3. What About...
7.1.3.1. ...disabling access to printers through Samba?
To prevent Samba from sharing your printers with Windows systems, delete (or comment out) this printer share in /etc/samba/smb.conf :
[printers]
comment = All Printers
path = /var/spool/samba
browseable = no
# Set public = yes to allow user 'guest account' to print
; guest ok = no
; writeable = no
printable = yes
Restart or reload Samba to activate the change.
7.1.3.2. ...accessing a Samba share on another Linux machine?
Use the Places→Network Servers option on the GNOME menu (or go to smb:// in KDE's Konqueror) to browse Windows network shares, including Samba shares.
You can also mount Samba or Windows shares at the command line. To mount the share bluesky from the server pictures on the mount point /mnt/pictures :
# mount -t smb //bluesky/pictures /mnt/pictures
This invokes the smbmount command.
7.1.4. Where Can I Learn More?
The manpages for samba , smb.conf , smbd , nmbd , findsmb , smbmount , and smbumount
The files in /usr/share/samba* , especially /usr/share/samba*/Samba-Guide.pdf and /usr/share/samba*/Samba-HOWTO-Collection.pdf
The Samba web site: http://www.samba.org/
7.2. Configuring a DHCP Server
Dynamic Host Configuration Protocol (DHCP) is used to automatically send basic configuration data to computers and network devices. This centralizes network configuration control so that a change in the network layoutsuch as adding a nameserver or a gateway, or renumbering the networkdoes not require a visit to every computer in the network. DHCP also provides a convenient method of supplying network configuration information to visiting computers, such as the laptop of a visiting colleague.
When a DHCP client system boots, it effectively shouts a broadcast message to the network: "Does anyone know who I am?" The DHCP server replies, "I know you, you're..." and then proceeds to tell the client its IP address and some combination of other network configuration information, possibly including a hostname, nameserver, timeserver, gateway, and default domain. The information sent by the DHCP server is called a lease and is only valid for a set length of time. The client can renew the lease when it expires, in which case it can keep its identity, or, if it disappears from the network and fails to renew the lease, the IP address can be recycled by the DHCP server and assigned to another host.
Most home and small networks are connected to the Internet by a router or gateway device that includes DHCP service capability. However, you may prefer to use the Fedora DHCP server instead because it gives you more configuration options and control over the network configuration.
7.2.1. How Do I Do That?
Before you set up a DHCP server for your network, you must design the network layout that you wish to use.
Private networksones that will not be connected to the Internet, or that will be connected through a router or gateway that performs network address translation (NAT), or masquerading will use one of the private network ranges defined in RFC 1918, shown in Table 7-1.
Table 7-1. RFC 1918 private network addresses
| Range | Number of addresses available | Class-based address breakdown |
|---|---|---|
| 10.0.0.0 10.255.255.255 | 16,777,216 | 1 class A network of 16,777,216 addresses |
| 172.16.0.0 172.31.255.255 | 1,048,576 | 16 class B networks of 65,536 addresses each |
| 192.168.0.0 192.168.255.255 | 65,536 | 256 class C networks of 256 addresses each |
Most small networks use one of the class C networks that start with the 192.168 prefix, yielding 256 addresses. Because two addresses are reserved for broadcast and network messages, that leaves 254 addresses for computers and network devices (such as printers), which is plenty for most homes and small businesses.
DHCP can assign any combination of two address types:
static
Addresses that are always assigned to a specific computer or network device and never change. Even though these do not change, they are still communicated to the device using the DHCP protocol. Static addresses should be used for any host that other users will need to connect to, such as a web server or printer.
dynamic
Addresses assigned from a pool on a first-come, first-serve basis. Dynamic addresses are appropriate for computers, such as desktop systems, which will be connecting to remote hosts but will never (or rarely) be a destination for network connections.
Table 7-2 shows a possible network configuration for a home or small office network that will use the network prefix 192.168.1. In this example, available addresses have been divided into four ranges, one each for servers, network devices, desktop and laptop systems, and network infrastructure.
Table 7-2. Example of a small-office network configuration
| Address range and purpose | Host address | Name and description | Notes |
|---|---|---|---|
| 0 | Network | Reserved address | |
| 1-63 Servers | 1 | prime (nameserver, web server) | Traditional nameserver address |
| 2 | cabinet (Samba fileserver) | ||
| 3 | chatterbox (Asterisk phone system) | ||
| 3-63 | Future use | ||
| 64-127 Network devices(non-computers) | 64 | laser1 | Main laser printer |
| 65 | multifunction1 | Printer-scanner-copier | |
| 66 | webcam1 | Monitors front door | |
| 67-127 | Future use | ||
| 128-191 Desktop and laptop systems | Dynamically assigned | ||
| 192-254 Network infrastructure | 192-253 | Future use | |
| 254 | gateway (router; path to the Internet) | Traditional address for a gateway | |
| 255 | Broadcast | Reserved address |