As the Linux system administrator of insurance company Secure All, Inc., you nee

Question

As the Linux system administrator of insurance company Secure All, Inc., you need to design firewall rules for the organizations bastion host file server, which uses Samba. This server is located in the local area network (LAN) with the network address 172.16.0.0/12 and subnet 255.240.0.0. The server should also allow Web application access for its online transaction platform to mount the filesystem. The Web application resides on the Web server located in the demilitarized zone (DMZ). This server has two interface cards. One card, which is for the traffic from the DMZ firewall, is linked to the wide area network (WAN). This cards IP address is 192.168.1.5. The other interface card has the IP address 172.16.1.5 and is linked to the LAN.
Which firewall rules should be written using iptables for the server hosting Samba? Discuss and suggest firewall rules to allow administrators to remotely manage the server using SSH. Use the concept of default deny when designing the rules.

Explanation / Answer

The smb.conf file is a configuration file for the Samba suite. smb.conf contains runtime configuration information for the Samba programs. The smb.conf file is designed to be configured and administered by the swat(8) program. The complete description of the file format and possible parameters held within are here for reference purposes.

FILE FORMAT

The file consists of sections and parameters. A section begins with the name of the section in square brackets and continues until the next section begins. Sections contain parameters of the form:

The file is line-based - that is, each newline-terminated line represents either a comment, a section name or a parameter.

Section and parameter names are not case sensitive.

Only the first equals sign in a parameter is significant. Whitespace before or after the first equals sign is discarded. Leading, trailing and internal whitespace in section and parameter names is irrelevant. Leading and trailing whitespace in a parameter value is discarded. Internal whitespace within a parameter value is retained verbatim.

Any line beginning with a semicolon (

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