After you have installed Windows Server on a stand-alone server, run the Active Directory Wizard to create the new Active Directory forest or domain, and then convert the Windows Server computer into the first domain controller in the forest. To convert a Windows Server computer into the first domain controller in the forest, follow these steps:. Specify the full DNS name for the new domain.
Note that because this procedure is for a laboratory environment and you are not integrating this environment into your existing DNS infrastructure, you can use something generic, such as mycompany. Click Next. Click Permissions compatible only with Windows or Windows Server servers or operating systems , and then click Next. Because this is a laboratory environment, leave the password for the Directory Services Restore Mode Administrator blank.
Note that in a full production environment, this password is set by using a secure password format. The installation of Active Directory proceeds. Note that this operation may take several minutes. When you are prompted, restart the computer. On the Zone Type screen, make sure that Primary zone is selected and click Next. We now have a foundation that we can place resource records in for name resolution by internal clients.
Contrary to the forward lookup zone, a reverse lookup zone is used by the DNS server to resolve IP addresses to host names. Not as frequently used as forward lookup zones, reverse lookup zones are often used by anti-spam systems in countering spam and by monitoring systems when logging events or issues.
To create a reverse lookup zone:. On the Reverse Lookup Zone Name screen, enter There is now a reverse lookup zone titled This will be used to store PTR records for computers and servers in those subnets. Using the instructions above, go ahead and create two additional reverse lookup zones, one for a There are different types of resource records, and the DNS server will respond with the record that is requested in a query.
As such, we will create all but SRV records because Active Directory will create those automatically:. Right-click firewall. And, for demonstration purposes, it does not matter whether this server actually exists or not.
A corresponding PTR record will be created in the appropriate reverse lookup zone. On the Browse window, double-click the server name, then double-click Forward Lookup Zones, then double-click firewall.
This should populate the webserver's fully qualified domain name in the Fully qualified domain name FQDN for target host text field.
Click OK afterwards. If the ' 2' is omitted, the target DNS zone will be set to perform standard dynamic updates only.
When a DNS zone is integrated with Active Directory, it has the added advantage of potentially utilizing secure dynamic updates. When DNS is configured to use secure dynamic updates, only computers that have been authenticated to the Active Directory domain can perform dynamic updates. However, when a zone becomes an Active Directory-integrated zone, secure dynamic DNS updates are turned on by default. Use the Ntdsutil to perform an authorative restore operation of the Active Directory database.
Use the Ntdsutil utility to perform an authoritative restore operation of the appropriate subtree. Explanation: If an OU gets deleted from the Active Directory, we can restore it from a backup of the system state data. Directory Services Restore Mode is a sort of safe mode in which we can boot a domain controller without loading the Active Directory. This will enable us to restore all or part of the Active Directory database.
To ensure that the deleted OU isn't deleted again by replication from another domain controller, we must use the Ntdsutil utility to mark the restored subtree as authoritative. C: We don't need to restore the entire Active Directory database; we can just restore part of it.
D: This will overwrite the existing Active Directory database. The network consists of a single Active Directory domain named testking. The network contains 10 domain controllers and 50 servers in application server roles. All servers run Windows Server The application servers are configured with custom security settings that are specific to their roles as application servers. Application servers are required to audit account logon events , object access events, and system events.
Application servers are required to have passwords that meet complexity requirements , to enforce password history , and to enforce password aging. Application servers must also be protected against man-in-the-middle attacks during authentication. You need to deploy and refresh the custom security settings on a routine basis. You also need to be able to verify the custom security settings during audits. Explanation: The easiest way to deploy multiple security settings to a Windows computer is to create a security template with all the required settings and import the settings into a group policy.
We can also use secedit to analyse the current security settings to verify that the required security settings are in place. You are the security analyst for TestKing. The perimeter network contains an application server, which is accessible to external users. You view the logs on your intrusion-detection system IDS and on the router and discover that very large numbers of TCP SYN packets are being sent to the application server.
You note that all incoming SYN packets appear to be originating from IP addresses located within the perimeter network's subnet address range. No computers in your perimeter network are configured with these IP addresses. The router logs show that these packets are originating from locations on the Internet. You need to prevent this type of attack from occurring until a patch is made available from the application vendor. Because of budget constraints, you cannot add any new hardware or software to the network.
Your solution cannot adversely affect legitimate traffic to the application server.
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