Network Programming in .NET

If you host your DNS on Amazon Route53, and it’s reasonably complex, it’s worthwhile taking a backup of it, so that future errors can be undone quickly. There are some tools to do it, however, you can also write a script yourself in C# to do it.

First off, get the NUGET package

Install-Package AWSSDK

Create an IAM user within AWS with programmatic access, and get it’s Access Key and Secret ID. – I’ve given it Administrator access, but you should limit the scope to the minimum.

Then I output all the zones to the console here;

var client = AWSClientFactory.CreateAmazonRoute53Client(“***”, “***”, RegionEndpoint.USEast1);

var strOutput = @”route53backup.json”;

var req = new ListHostedZonesRequest();
for (; ; )
{
var zones = client.ListHostedZones(req);
foreach (HostedZone zone in zones.HostedZones)
{

Console.WriteLine(zone.Name);

var recordSets = client.ListResourceRecordSets(new ListResourceRecordSetsRequest() { HostedZoneId = zone.Id });

foreach (var record in recordSets.ResourceRecordSets)
{
Console.WriteLine(“\t” + record.Name + ” (” + record.Type + “)”);

foreach (var resource in record.ResourceRecords)
{
Console.WriteLine(“\t\t” + resource.Value);

}
}
}
req.Marker = zones.NextMarker;
if (req.Marker == null)
{
break;
}
}

Note that the ListHostedZones call only returns 100 domains at a time, you have to set the “marker” parameter to the value of the NextMarker property that was returned on the previous call to get all records.