10/6/2023 0 Comments Samba safety check![]() To do this, log on to a Windows client in the domain and create a network connection ( Figure 1).įigure 3: Rights set in Windows for the Production folder.įor users to access their department's folder, you need to set up the appropriate share. Now you want to test whether it is possible to create a connection to the share. All authorizations are assigned from Windows. The following snippet shows the share from smb.conf: Īs you can see, no parameters for access rights are entered here. The advantage of this approach is that you can assign all permissions directly under Windows and thus have a uniform permissions structure on all servers, whether Windows or Samba servers. You can then assign the directories created there to users in individual shares with group policy objects (GPOs). The directories are then made available to the users in this share. Here, you want create an administrative Windows share to which only the Domain Admins group has write access, similar to drive shares under Windows. Now comes the point that makes the server usable in the first place: setting up the first share. Running smbclient will only output an error message that it always connects via NetBIOS. Testing from the outside with nmap also shows only two open ports. A new test with netstat then only shows port 445 as open. To do so, add the smb ports = 445 line to smb.conf in the global area and restart the service. However, because NetBIOS has been disabled on the server, you can also disable this port. One is TCP port 445, which is the port for the SMB connections, and the other is TCP port 139, which provides SMB connections via NetBIOS. What does the list of ports on the server look like now? To find out, use netstat again ( Listing 4). This example reveals that there is no master for NetBIOS in the domain – all domain controllers and the file server no longer use NetBIOS. The connection only works if you use a protocol newer than 2.0 (see Listing 3). What happened here? Because you have set the minimum protocol to version 2.1 in the smb.conf file, smbclient cannot connect. Protocol negotiation failed: NT_STATUS_INVALID_PARAMETER_MIX The following shows a first attempt at connecting to the server: smbclient -L For this, you use the smbclient command on the server. ![]() Next, test whether the new file server also responds to requests. Now you have to adjust the /etc/nf file: passwd: compat winbind To test that all services start properly, even after a reboot, reboot the system. After installing the package, create a new /etc/nf with the following content: Īfter adding the DNS servers of the AD domain to the /etc/nf file, you can then join the server to the domain: net ads join -U net ads testjoin In the next step, you want to create this file with the minimum parameters. You can simply confirm the values that are requested during the installation of the packages with a Return. However, connections can still be made.Īfter you have created the smb.conf file, you must now ensure that the Samba server can also communicate with the domain's Kerberos server. The server no longer appears in the network environment of the clients.
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