Thanks for publishing this script. I am a bit new to Powershell, but am learning. I have a Microsoft Windows 2008 R2 server that runs DNS, and Powershell 3.0. I want to be able to back up my DNS Zones using your script. I seem to be getting tripped up with this command:
DNS backup script
We have seen this error when UAC is enabled and you run the powershell console as a standard user. Please try to run the script within a powershell console started with elevated privileges and check if this is working.
It looks like you are using a custom dns module (DnsShell module). The script we have provided does not use any custom module but simply call DNSCMD.EXEAbout your other question about any tips, If you have an Active Directory infrastructure, you should be using AD integrated zones. This ways you would only need to backup one DC only.
I would like to add some improvements to the Backup Script.This modifications allows to use a shared folder to drop the backup objetcs.The comments are in spanish but are almost the same as the original script.
If this is the only script you intend to publish into Microsoft Web site, we are OK with this. Thank you for notifying us and having left the original credits and link to our web site. Remember that our resources are free to use but copyrights might apply.
1. It is not clear for me what and what I should change to suit my environment. Please help newbie like me indicate what and what I need to change to suit environment.1. Once I run this ps script, will it be running automatically? Or I have to be running it every time I want to backup.2. What is the proper syntax for a remote server? (\\remotesever.com\folder) and env:network. Right?3. Does this script work for Win 2016 Server.Once again my apologies for any kind of inexperience here. I want to learn.Thanks-Schubborniel
1. you do not need to change anything. The script will detect automatically your settings and perform the actions2. The script will run only once when started. If needed to perform regular backups, use task scheduler to schedule a job that would call the script3. The script as is should be running locally on your dns server. If you want to execute the script from a remote machine, you will have to adapt the script4. The script should be working on Windows 2016 Server
@Paul;Thank you for visiting our blog and providing some feedback. The script here will only do the export of the data also AD integrated zone but will not export the Security information. You will need to come up with an additional function or a separate script to do that.
These scripts backup and restore all DNS zones on specific DNS server (source).The backup script uses the Powershell cmdlet get-wmiobject to list the DNS zone present in the WMI database and then export each zone using the dnscmd tool.The restore script uses the dnscmd tool to create the zone and his content.
In the "Program/script" field enter the path to sdnsplus.exe and in the "Add arguments" field enter "-b", space, and the path to the backup file (remember quotes if it contains spaces), and click the "OK" button:
Standalone DNS zone can be backed up by the method Mukesh posted about directly copy the DNS database file and since AD integrated zone is contained by AD database so the AD backup-restore will achieve that .
Anyone who has worked with IT infrastructure for any length of time has most likely heard that a Domain Name System (DNS) problem caused an outage. It hits enterprises of all sizes, including major cloud-based companies. Whether by accident or a DNS server malfunction, records can disappear from DNS. When this happens, services fail almost immediately when clients cannot get to a computer on your network. Learn how to protect your organization by getting familiar with the DNS backup and restore process.
It's a good practice to perform a regular backup to prepare for data loss. So how do you back up DNS? Microsoft produced the DNSServer and DNSClient PowerShell modules for this type of DNS work, specifically the Export-DnsServerZone cmdlet. The syntax to back up DNS is straightforward, as shown in the following example:
Make sure you back up relevant zones and skip the ones that can't be exported because the DNS server created them automatically. Use this modified version of the backup script I created and use in my corporate network to back up the DNS server daily. The script connects to a specified DNS server and then gets all zone information. It then loops through each DNS zone and exports the information to create a .DNS file that is readable in a text editor.
Microsoft's prescribed method to back up and restore DNS settings is not consistent. While you can use either PowerShell or the DNSCMD utility to make the backup, you need to use another tool, the New Zone Wizard in the DNS manager, to perform the restore when dealing with many records.
When dealing with many records, it might be preferable to restore an entire zone file. The process is simple but not intuitive. First, place a copy of your DNS backup into the c:\windows\system32\dns folder of your DNS server. Next, open the DNS Manager and right-click on the DNS server name and select Create new zone.
Next, select the proper zone type for the new zone: forward or reverse. When you name this zone, use the same name for the zone that you are restoring. In my instance, I am using mk.lab from my lab. Next, choose to restore from an existing file and select the backup file.
Some aspects of DNS server management are not straightforward. This guide and script will help you get started quickly, but DNS administration in a production environment requires a deeper dive into Microsoft's documentation to build your expertise with this service.
Note:1. The command creates a file containing resource records for an Active Directory-integrated zone for troubleshooting purposes. A system state backup should be made at regular interval of time as a failsafe to avoid disaster senario.
6. On the Zone File Wizard, select the option Use this existing file and give the path of the file (our file is stored in %systemroot%\system32\dns\backup so we have given backup\zone1.com.dns)
Note: Make sure the current backup of the Zone1.com is present in the following path, C:\Windows\System32\dns\backup by Coping the zone1.com.dns.bkp file to the parent folder (C:\Windows\System32\dns). Rename the file from zone1.com.dns.bkp to zone1.com.dns (remove the .bkp extension).
The final part of the script will parse the input.csv file and based on the type of zone (AD Integrated or not), the script routine will start the dnscmd command line utility using different parameters based on the zone format you need to restore (primary, secondary, stub or forwarder zones)
The point in showing this is that while replication is not a backup, you are creating duplicate copies of your DNS zones (in a good way) on the other domain controllers running in your Active Directory infrastructure. Just like you want to have more than one domain controller running to align with best practice, making the DNS zone a part of Active Directory applies the same principle to your DNS zones running on multiple domain controllers. The DNS zones that are AD-integrated are replicated to all other domain controllers, aligning with the settings you choose in the replication options.
On top of your DNS zone being replicated and having a copy of the AD-integrated zones on other domain controllers, your DNS information is essentially captured when you backup your domain controller and use the application-aware features of most modern backup solutions to backup Active Directory.
By using the above processes, you can control, backup, and restore, the copies of your DNS zones in a way that allows high-availability for your DNS and name resolution infrastructure in business-critical environments.
The default Azure Automation environment doesn't support Azure CLI commands - if you can't find the right PowerShell cmdlet that aligns to the Azure CLI command - you could set up a Hybrid Worker environment that will run the scripts on your own server with Azure CLI installed, you could then use that in your scripts.
What this script does is run nslookup on every host in a text file (for example./dnsbak.pl hostlist.txt), parse the text and format it in a hosts file format.All you should need to do is take the output from this script and append it toyour hosts file and you should be back up and running.
The script you provide (Tony has a few examples in the repository) is passed the name of the notified zone, its SOA serial number and the address of the master authority server which emitted the NOTIFY. Whether or not you actually use that data is up to you, of course. nsnotifyd can be used for all sorts of things:
This project doesn't directly support a restore of your of your backed up dns settings.Instead, the script transform_dnssync_nc.py can be called on an existing backup file (e.g. ./transform_dnssync_nc.py backup_DNS_netcup_-_example.com_2021-12-29_19-13-04.json) to create a dump, that couldbe imported via dnssync_nc.
The output will be stored (if we stay at the example)in backup_DNS_netcup_-_example.com_2022-01-15_01-17-04_dnssync_nc.json. Please note, that the timestamp in thefilename will be from the point of time, where you transformed the file and not stay on the timestamp, where the initialbackup was created.
If you are already using Route 53 and need a backup of your DNS records, you can use the following tutorial to download your data and store it in a secure location for future reference. All you need is a little script and a couple of command line tools. 2ff7e9595c
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