Really Long Outages Weeks Parenting When to Become a Parent How Many Children? What to Name Your Children How to Become a Parent: Creating Subdomains Creating and Delegating a Subdomain An fx. On the movie. Delegating an in-addr. Adding a movie. Subdomains of in-addr.
Subnetting on an Octet Boundary Subnetting on a Nonoctet Boundary Class A and B networks Solution 1 Solution 2 Solution 3 Good Parenting Using DNSLint Managing Delegation Managing delegation with stubs Managing the Transition to Subdomains Removing Parent Aliases The Life of a Parent Advanced Features and Security New Ways to Make Changes Dynamic Update Incremental Zone Transfer More Efficient Zone Transfers WINS Linkage Load Sharing Between Mirrored Servers IPv6 Forward and Reverse Mapping Securing Your Name Server Preventing Unauthorized Zone Transfers Disabling Recursion on Delegated Name Servers Is nslookup a Good Tool?
Multiple Servers Timeouts The Search List Zone Transfers Interactive Versus Noninteractive Option Settings Avoiding the Search List Common Tasks Looking Up Different Data Types Authoritative Versus Nonauthoritative Answers Switching Servers Less Common Tasks Seeing the Query and Response Messages Querying Like a Name Server Troubleshooting nslookup Problems Looking Up the Right Data Query Refused Best of the Net Using dig Zone Transfers with dig Installing the DNS Server An Installation and Configuration Batch Script Other Command-Line Utilities DNSLint Managing DNS Programmatically Quick Overview Referencing an Object Enumerating Objects of a Particular Class Searching with WQL Authentication with WMI Server Classes Configuring a Name Server Monitoring Server Performance Zone Classes Creating a Zone Configuring a Zone Listing the Zones on a Server Resource Record Classes Finding Resource Records in a Zone Creating Resource Records Troubleshooting DNS Checking the Cache Potential Problem List Forget to Increment Serial Number Forget to Restart Primary Master Server Name Server Loses Manual Changes Loss of Network Connectivity Missing Subdomain Delegation Incorrect Subdomain Delegation Interoperability Problems Problem Symptoms Wrong or Inconsistent Answer Lookups Take a Long Time Miscellaneous Wildcards A Limitation of MX Records DNS and Internet Firewalls Types of Firewall Software Packet filters Application gateways In most cases a successful backup strategy ensures that in the event of a minor mishap or disaster the configuration can be restored on an alternate system.
Do not overlook DNS as complex configurations can be difficult to restore without documentation and prior knowledge of destroyed systems.
In terms of integrity you need to ensure that no one but authorized users have access and control over the DNS sever this is important as you do not want your resources abused and miss-configured by intruders that have other plans for you vital naming service.
If you are in a high security environment it is essential that this server be locked down as it is an easy target for intruders that want to cause a denial of service on you active directory. It may be a good idea to only let LAN users that are part of the domain to query your DNS server to ensure confidentiality of your naming conventions and other sensitive information.
By adding these additional layers to your DNS server you can be assured of. This needs to be opened on the firewall if you need to use your internal DNS for lookups. Note: this decision will be defined in the planning phase and should be carefully calculated.
From a security perspective only publish services to the public domain if it is necessary. If you would like to administer the DNS server remotely you will need to open RCP port only do this is it is necessary and if you have secured the server. If you are using ISA there are predefined protocol filters that have been define that you can enable. Please make sure that all of the Windows updates are done and the latest drivers and Rom packs have been loaded on the server and applied to the hardware this is essential as you do not want to be applying these changes at a later stage when the machine goes into production.
Skipping this step will cause unnecessary down time in future. Please make sure that the static IP address is assigned to the server before beginning the installation process.
After the entire preamble we are now ready to start installing DNS on our newly configured and prepared server. Ensure that you have Windows Server Std is installed and that a static IP address has been assigned.
Figure 1. Selecting a DNS server that is consistently up is paramount as external name resolution rests on this resource. You should restart the DNS service after you make this change. Web interfaces to e-mail servers are an instance of this need. Assume that the Web Access server is assigned The local machines need to address the machine using the private IP address while external clients need to use the real IP address.
In this example, your internal clients will resolve internal addresses using the local DNS servers. Right-click the name of your DNS server and select Properties from the shortcut menu. Figure A below shows a sample of this window. Editor's Picks.
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