![]() This will allow only our client at 192.168.0.100 to connect, as well as localhost 127.0.0.0/8. The Samba file shares are configured with the /etc/samba/smb.conf file, this file lists the directories that are available to be accessed over SMB/CIFS, as well as defines any specific source IP addresses that should be allowed to connect in. This creates a standard Linux user, however we need to set an SMB password on the account. We’re specifying the /sbin/nologin shell here as we don’t want this particular user to be able to directly log into the server via console or SSH, this account is going to be used for SMB access only. Next we’re going to create a user whose home directory will be shared. Note that the -P makes this a permanent change which will persist over system reboot. In this example we’re going to mount a user’s home directory over SMB, so we need to make the following change to SELinux to allow this. firewall-cmd -permanent -add-service=samba The firewall configuration must also be reloaded as we have put a permanent rule in place which will not apply to the running configuration. This change will allow TCP ports 135/445 SMB/CIFS traffic into the server from any source IP address. Next the firewall must be configured in order to correctly allow SMB traffic through, this can be done as shown below with firewalld. Once the smb service has started successfully, we can confirm that it is correctly listening on TCP ports 139 and 445. systemctl enable smb nmbįor further information on basic service management with systemctl, see our guide here. ![]() ![]() ![]() We also do this with the NMB service, which is responsible for NetBIOS and is part of the samba package. Once installed we can enable our Samba server to automatically start the required SMB service on boot, we’ll also start the service up now as it’s not running by default after installation. The server that has the data to share will act as the SMB server and needs the samba package installed. Samba Server: 192.168.0.200 – This Linux server will serve a directory over SMB/CIFS to the client.Samba Client: 192.168.0.100 – This Linux client will mount a directory from the SMB/CIFS server.Here is a list of our servers that we will be testing with, both are running CentOS 7. Studying for your RHCE certification? Checkout our RHCE video course over at Udemy which is 20% off when you use the code ROOTUSER. To do this we are going to use the /etc/samba/smb.conf file on the SMB/CIFS server and lock down shares to only be accessible by specific IP addresses and user accounts. It is important to configure this properly and secure it as much as possible so that only the required clients and users have access to the SMB/CIFS share, otherwise it may be possible for anyone to mount and access the data. With Samba we can export specific directories within a file system over the network to other Windows or Linux clients, allowing us to share various files over the network between different operating systems. Samba is an open source implementation of the server message block (SMB) and common internet file system (CIFS) protocols, it allows us to access Windows file share resources from Linux.
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