Figure 7 From A Role For Mac

Someone can suggest me a real situation in which is better to use MAC (Mandatory Access Control) instead of DAC (Discretionary Access Control) or RBAC (Role Based Access Control)? And in which DAC is better than the others? And in which RBAC is the best? I know the theoretical notions, and I know that RBAC is better in situation in which we want to assign the rights not to the people, but to the specific job. I know also that MAC and RBAC is better in situation where we want to avoid that an user can manage the rights. DAC is the way to go to let people manage the content they own. It might sound obvious, but for instance DAC is very good to let users of an online social network choose who accesses their data.

It allows people to revoke or forward privileges easily and immediately., and provide nice examples of research on DAC with users. RBAC is a form of access control which as you said is suitable to separate responsibilities in a system where multiple roles are fulfilled. This is obviously true in corporations (often along with compartmentalization e.g.

Or ) but can also be used on a single user operating system to implement the. RBAC is designed for by letting users select the roles they need for a specific task. The key question is whether you use roles to represent tasks performed on your system and assign roles in a central authority (in which case RBAC is a form of MAC); or if you use roles to let users control permissions on their own objects (leading to multiple roles per object and absolutely no semantics in roles, even though it's ). MAC in itself is vague, there are many many ways to implement it for many systems. In practice, you'll often use a combination of different paradigms.

For instance, a UNIX system mostly uses DAC but the root account bypasses DAC privileges. In a corporation, beyond separating your different departments and teams with MAC/RBAC you may allow some DAC for coworkers to share information on your corporate file system. It'd be better to make your question specific and tell what system(s) you want to protect, if any.

What access control to use always depends on the specific situation and context you're considering. Each system is used for a different overriding security requirement. The three main security requirements are confidentiality, integrity, and availability. MAC supports a security requirement of confidentiality more so than the others.

DAC supports the security requirement of availability more so than the others. RBAC supports the security requirement of integrity more so than the others.

There is another. MAC makes decisions based upon labeling and then permissions. DAC makes decisions based upon permissions only. RBAC makes decisions based upon function/roles.

When the system or implementation makes decisions (if it is programmed correctly) it will enforce the security requirements. If you use the wrong system you can kludge it to do what you want. This happens quite often. They are not mutually exclusive except for DAC vs MAC. There are combination implementations DAC/RBAC the best example of this Active directory roles and permissions. RBAC - tends toward databases - a classic example of where you cannot use one of the other systems and must used RBAC is for customer service and billing.

When you call the cable company to get your pay-per-view the Customer service representative will say I'm sorry let me transfer you to Billing so that you can pay your overdue bill- they know you have an overdue bill but their role prevents them from taking your credit card information directly. When you get transferred to billing you pay your bill and say can I have my service. They say let me transfer you back- I see you want this service but that's not my function. So both roles can see all the data (no confidentiality) but can only manipulate the fields that they have a particular set of responsibilities for (integrity).you can argue DAC: but fits the 'more so' rule. MAC - tends toward a military systems or very narrowly defined, high security requirement implementations. 2 that are used quite often TRusted-Solaris and LINUX- MAC kernel module (this used to be SELinux) there're others but you don't care. One of the key elements that only appears in MAC is a construct of dominance.

If you have secret level clearance, no amount of permissions is going to get you to see a Top secret document. In commercial entities it is rare that you need this construct. But it brings up the second point that is unique to MAC- if an activity is not specifically allowed then you cannot do it.

Figure 7 From A Role For Mac Pro

(this breaks lot of commercial uses primarily because of rapid change to The mission or system requirements) An excellent use of MAC would be on a Web server- where you would write a custom policy (and this is very narrowly defined to that implementation) that states the Core processes can only be executed by the System account. Any processes spawned from that would be required meet specific permissions. DAC - everybody uses it and the person before me answer well enough.

You are here: User Roles User Roles This section describes how to create a new user role. Figure 111 - Access Tab - Instant User Role Settings Creating a New User Role To create a new user role: 1. Click the New link in the Networks tab. To define the access rule to an existing network, click the network. The edit link appears.

Click the edit link and navigate to the Access tab. In the WLAN Settings tab, enter the appropriate information and click Next to continue. Use the VLAN tab, to specify how the clients on this network get their IP address and VLAN. Click Next to continue.

Click Next and set appropriate values in the Security tab. The Access tab appears. Slide to Role-based using the scroll bar on the left.

The New Rule window appears. Enter the name of the new user role. To delete a user role, select the user role and click Delete. Figure 112 - Creating a New User Role 8. The Allow any to all destinations access rule is enabled by default. This rule allows traffic to all destinations. To create new access rules, see.

Assign pre-authentication role— Use this option if you want to allow some access to users even before they are authenticated. Enforce Machine Authentication— You can assign different rights to clients based on whether their hardware device supports machine authentication. Machine Authentication is only supported on Windows devices, so this can be used to distinguish between Windows devices and other devices such as iPads.  Machine Auth only role - This indicates a Windows machine with no user logged in. The device supports machine authentication and has a valid RADIUS account, but a user has not yet logged in and authenticated.  User Auth only role - This indicates a known user or a non-Windows device. The device does not support machine auth or does not have a RADIUS account, but the user is logged in and authenticates.

When a device does both Machine and User authentication, the user obtains the default role or the derived role based on the RADIUS attribute. To configure Machine Authentication, do the following: 1. In the Roles window, create a role for Machine auth only and User auth only.

Configure Access Rules for these roles by selecting the role, and applying the rule. Refer to for procedures to create access rules. Select Enforce Machine Authentication and specify these two roles. Click Finish to apply these changes.

Creating Role Assignment Rules This section describes the rules for determining the role that is assigned for each authenticated client. When Enforce Machine Authentication is enabled, both the device and the user must be authenticated for the role assignment rule to apply. To create role assignment rules for the user role: 1. Click New in the Role Assignment Rules section of the window.

The default user role is the newly created user role. Select the attribute from the Attribute drop-down list that the rule it matches against. The list of supported attributes includes RADIUS attributes (see ), DHCP-Option, 802.1X-Authentication-Type, and MAC-Address. Select the operator from the Operator drop-down list.

The following types of operators are supported:  contains— To check if the attribute contains the operand value.  Is the role— To check if the role is same as the operand value.  equals— To check if the attribute is equal to the operand value.  not-equals— To check if the attribute is not equal to the operand value.  starts-with— To check if the attribute the starts with the operand value.  ends-with— To check if the attribute ends with the operand value. Enter the string to match in the String text box.

Select the appropriate role from the Role drop-down list. Figure 113 - Creating Role Assignment Rules MAC-Address Attribute The first three octets in a MAC address are known as Organizationally Unique Identifier (OUI), and are purchased from the Institute of Electrical and Electronics Engineers, Incorporated (IEEE) Registration Authority. This identifier uniquely identifies a vendor, manufacturer, or other organization (referred to by the IEEE as the “assignee”) globally and effectively reserves a block of each possible type of derivative identifier (such as MAC addresses) for the exclusive use of the assignee. IAP uses the OUI part of a MAC address to identify the device manufacturer and assigns a desired role for users who have completed 802.1X authentication and MAC authentication. DHCP Option and DHCP Fingerprinting The DHCP fingerprinting feature allows you to identify the operating system of a device by looking at the options in the DHCP frame. Based on the operating system type, a role can be assigned to the device.

Figure 7 From A Role For Mac Free

For example, in order to create a role assignment rule with DHCP option, select equals from the Operator drop-down list and enter 370103060F77FC in the String text box. Since 370103060F77FC is the fingerprint for Apple iOS devices such as iPad and iPhone, IAP assigns Apple iOS devices to the role that you choose. Table 20 - Validated DHCP Fingerprint Device DHCP Option DHCP Fingerprint Apple iOS Option 60F77FC Android Option 60 3C6420342E302E3135 Blackberry Option 60 3C426C727279 Windows 7/Vista Desktop Option 55 2c2e2f1f2179f92b Windows XP(SP3, Home, Professional) Option 55 2c2e2f1f21f92b Windows Mobile Option 60 3c4d6963726f77696e634500 Windows 7 Phone Option 60f2c2e2f Apple Mac OSX Option 60f775ffc2c2e2f 802.1X-Authentication-Type IAP allows you to use client 802.1X authentication to assign a desired role for users who have completed 802.1X authentication. When creating more than one role assignment rule based on RADIUS attributes, a DHCP option, and 802.1X-authentication-type, the first matching rule in the rule list is applied.