.On your Mac, choose Apple menu System Preferences, then click Network.Click the Add button in the list at the left, click the Interface pop-up menu, then choose VPN.Click the VPN Type pop-up menu, then choose what kind of VPN connection you want to set up, depending on the network you are connecting to.
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Tony Piltzecker, Brien Posey, in, 2008 Remote Access PolicyRemote access policies are an ordered set of rules that define how connections are either authorized or rejected. For each rule, there are one or more conditions, a set of profile settings, and a remote access permission setting. If a connection is authorized, the remote access policy profile specifies a set of connection restrictions. The dial-in properties of the user account also provide a set of restrictions.
Cisco Meraki Client VPN can be configured to use a RADIUS server to authenticate remote. Add MX Security Appliance as RADIUS clients on the NPS server; Configure a. RADIUS configuration steps using Microsoft NPS on Windows Server 2008. Configure a RADIUS Connection Request in NPS.
Where applicable, user account connection restrictions override the remote access policy profile connection restrictions. For servers running the RRAS that are configured for the Windows authentication provider, remote access policies are administered from RRAS and apply only to the connections of the RRAS server. Centralized management of remote access policies is also used when you have remote access servers that are running RRAS. Remote access policies validate a number of connection settings before authorizing the connection, including the following: ▪Remote access permission ▪Group membership ▪Type of connection ▪Time of day ▪Authentication methods ▪Advanced conditions such as access server identity, access client phone number, or Media Access Control (MAC) address ▪Whether user account dial-in properties are ignored ▪Whether unauthenticated access is allowed. Now that we have the option to control access via Remote Access Policy (instead of a per user account basis), let's see how VPN access control via Remote Access Policy is performed: 1.Click Start; point to Administrative Tools, and click Internet Authentication Service.
2.Click Remote Access Policies in the left pane of the console. You will see the VPN Access Policy and two other built-in Remote Access Policies. You can delete the other policies if you require only VPN connections to your ISA firewall. Right-click on Connections to other access servers, and click Delete.
Repeat with Connections to Microsoft Routing and Remote Access server. 3.Double-click on the VPN Access Policy in the right pane of the console.
In the VPN Access Policy Properties dialog box there are two options that control access permissions based on Remote Access Policy: ▪Deny remote access permission ▪Grant remote access permission. A traditional LAN is usually located within the physical confines of a building.
The systems within the bounds of the LAN are administered by an individual or group of individuals and usually a policy is in place to guide the administration and configuration. When users connect from outside the confines of the LAN, often the system the client connects from is not administered by the corporate administrator or administrators.
This can present configuration problems as well as security problems. Remote access policies help administrators apply a consistent policy to non-LAN machines, the machines that are often not directly administered within the confines of the corporate LAN. Through the use of remote access policies, administrators can limit the access rights and privileges of remote users and computers by validating connections and can specify connection restrictions. Connection settings that can be validated by standard remote access policy settings include the following: ■Authentication methods ■Group membership ■Remote access permission ■Time of day ■Type of connection. NoteThis is not an all inclusive list; there are many other condition attributes that can be set on a remote access policy, such as protocol type, service type, tunnel type (for VPN connections), client IP address, and vendor of the RADIUS proxy (IAS).Authentication method refers to the authentication type being used by the client (EAP, CHAP, MS-CHAP, etc.).Group membership is configured through Active Directory Users and Computers. Groups significantly reduce the necessary amount of administration by grouping users according to similar job functions, access rights and requirements, and other common similarities between users. Group membership policy restrictions can be used to allow corporate users to gain network access based on one set of criteria, whereas users from a specific vendor or partner might have a different set of remote access restrictions or rules.Time of day restrictions ensure that users can log in only during certain times.
This can be used to keep users disconnected during certain maintenance operations or to keep remote users out of the network after normal business hours.Type of connection validation sets different remote access policies based on the method the user uses to connect. For example, VPN users can have one policy, whereas analog dial-up users are governed by a different policy.Access server identity validation ensures that users connecting to a specific access server have a specific policy applied to them. This can be used to ensure that a user is connecting through proper channels.
If someone were to attempt to break into the network through a nonauthorized connection, this restriction will prevent such access.Access client phone number validation ensures the user is connecting from an authorized location or computer. Using the client’s calling phone number (which is specified as the Calling Station ID) as validation relies upon a certain amount of physical security as well as the password or certificate-based electronic security.
Someone would theoretically have to break into the calling location and use that phone to connect based on this validation. NoteAgain, the dial-in constraints listed are not the only ones you can set. You can also specify that access is allowed only via specific media (FDDI, wireless, Token Ring, Ethernet, DSL, cable, etc.).Encryption strength typically ranges from 40-bit to 168-bit.
Encryption property settings for Windows Server 2003 include no encryption, Basic encryption (40-bit MPPE or 56-bit DES), Strong encryption (56-bit MPPE or 56-bit DES), and Strongest encryption (128-bit MPPE or 168-bit 3DES). Idle timeout is used to secure the network by disconnecting users after a specific amount of idle time has passed. IP packet filters restrict connections based on the services being requested. For example, Telnet access may be granted to a dial-in user by configuring an IP packet filter to allow traffic to TCP port 23 at a particular address.
Maximum session time ensures security by disconnecting a user after a specified amount of time regardless of the current session status (idle or active). Specific IP addresses may be distributed through PPP connections to restrict access to portions of the network. This provides another method for securing network access through remote access policy.
Static routes also set network access restrictions by routing or not routing specific traffic based on destination network address. Finally, global remote access policies may be varied according to the following: ■Access client phone number or MAC address ■Authentication methods ■Group membership ■Identity of the access server ■Time of day ■Type of connection ■Whether unauthenticated access is allowedWindows Server 2003 remote access servers provide remote access policy through the Routing and Remote Access Service on stand-alone machines. The RRAS policy applies to connections through that specific RRAS server in that case.
If you are using IAS or RADIUS on your network, remote access policies are configured through the Internet Authentication Service or RADIUS server. To configure a remote access policy for your RRAS server: 1.First, configure the user accounts to use remote access policy for dial-in access. 2.Click Start Programs Administrative Tools Active Directory Users and Computers.
3.The user accounts should have the Remote Access Permission (Dial-in or VPN) option set to Control access through Remote Access Policy. 4.Now, open the Routing and Remote Access management console to configure the policy.
5.Click Start Programs Administrative Tools Routing and Remote Access. 6.If necessary, double-click Routing and Remote Access and the server name. 7.In the left pane, right-click Remote Access Policies, and then click New Remote Access Policy. 8.Select the appropriate policy settings as discussed earlier. 9.Delete the default policies.
The Published Certificates tab provides a listing of certificates that are used by the account, and allows you to add others. As shown in Figure 2.21, this tab allows you to view any X.509 certificates that have been published for the user account, and includes fields that explain who it was issued by, who it was issued to, the intended purpose of the certificate, and its expiration date. The Add from Store button can be used to add additional certificates to the listing from the computer’s local certificate store. The Add from File button can also be used to add a certificate from a file.
If a certificate is no longer needed, you can select the one you no longer want to be applied to the account and click the Remove button. Finally, the Copy to File button will export the certificate that is selected in the list to a file. Dial-In Tab ■Remote Access Permission (Dial-in or VPN) This option button specifies whether the user can connect to the network via a dial-up or VPN connection. The options in this section include Allow access, which enables dial-in or VPN remote access; Deny access, which prohibits dial-in or VPN remote access; and Control access through a Remote Access Policy, which is the default option and specifies that a remote access policy is used to control permission for remote access. ■Verify Caller-ID This check box allows you to specify the telephone number that the user must be calling from in order to establish a successful connection.
It requires hardware capable of detecting the number that the user is calling from. ■Callback Options The configuration settings in this section are No Callback, Set by Caller (Routing and Remote Access Service Only), and Always Callback To.
No Callback is the default option. It enables users to connect remotely and without the use of callback. When this option is set, the user will pay for any long distance charges. Set by Caller (Routing and Remote Access Service Only) allows the caller to specify a telephone number that the server will call back.
When a remote connection is made, the user is prompted for a username and password. If successfully authenticated, the settings on this tab are checked and the user is prompted for a telephone number to be called back at. The server then disconnects and calls the user back at that number. This allows the company to pay for any long distance fees, which typically results in cost savings. Always Callback To is the final option. This is a security, not a cost savings, option that forces the server to call the user back at a preconfigured telephone number. Because this setting requires the user to be at that telephone number, the risk of unauthorized users attempting to connect remotely is reduced.
■Assign a Static IP Address This check box assigns a specific IP address to the user when the user connects remotely. ■Apply Static Routes This check box places additional routes in the routing table upon connection. ■Static Routes This button is used to define the additional routes that will be placed in the routing table upon connection.
As we saw in Chapter 1, the Security tab ( Figure 2.23) is used to configure what permissions other users and groups have to an object. This tab consists of two panes. The top pane lists users and groups that have been added to the DACL for the account. It also allows you to add or remove users and groups from the DACL. In the lower pane, you can enable or disable specific permissions by checking a check box in the Allow or Deny column. Special permissions can also be set for objects by clicking the Advanced button, which displays a dialog box (seen in Figure 2.24) where additional permissions can be applied. Special Permissions Dialog BoxAs seen in Figure 2.24, the Special Permissions dialog box that’s accessed through the Advanced button of the Security tab allows you to configure advanced settings and apply additional permissions to an account.
As seen in this dialog, the Permissions tab also provides an option labeled Allow inheritable permissions from the parent to propagate to this object and all child objects. When this check box is checked, any permissions applied to the parent object (which in this case would be an OU) are also applied to this account. If this check box is unchecked, then any permissions applied at the higher level will not be applied, and the object will only have the permissions that have been explicitly set for it.
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