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showing posts tagged with 'dns'
 
Configure DNS for Office 365 using DirectAdmin
edited by on August 17th 2015, at 13:25
EDIT: highlight required trailing dots + added CNAME for msoid.

If you're using a hosting provider which uses DirectAdmin for its DNS management, it may be a hassle to correctly configure DNS records for Office 365, mainly because of syntax issues. After some trial-and-error and googling, I finally managed to correctly devise the proper syntax to configure Exchange Online and Lync Online.

The set up of the entries below is a left and right field in the DNS management, safe for MX-records, which are set up elsewhere. For most services, don't forget to add the trailing . at the end of each record pointing to a Microsoft Server. Otherwise, resolving will incorrectly add your own do  ...
 
Change the weight and priority of a domain controller in the same site
edited by on July 2nd 2015, at 13:29
Contacting a domain controller in Active Directory is done through DNS lookup. Several DNS SRV records are used to find domain controllers in a site. If multiple domain controllers are present in the same site, the client will arbitrarily select one, based on the contents of those records.

By default, the selection is random, and all DCs have an equal change of being picked. The inherit properties of SRV-records allow for this behaviour to be influenced, by changing the weight and priority of those records. This enables fine-tuning and configuration of which DC to favour or even exclude. By default, all SRV records (thus, all DCs) have their weight and priority set to 0.

The weight defines  ...
 
Trigger replication of a AD integrated DNS zone
edited by on June 26th 2015, at 11:25

Active Directory (AD) integrated DNS zones are not replicated by the DNS server, but replicates through the Active Directory replication mechanism, and uses the same settings for AD replication.

You can trigger replication through Active Directory Sites and Services, or with repadmin.exe on command prompt:

repadmin.exe /replicate target_dc source_dc DC=DomainDnsZones,DC=domain,DC=com

Replace parameters accordingly:

  • target_dc is the DC to replicate to
  • source_dc is the DC to replicate from
  • Edit the naming context so it includes your FQDN: e.g. contoso.co.uk → DC=contoso,DC=co,DC=uk
 
SPF Wizard
edited by on September 4th 2014, at 11:52

To generate an SPF-record for your domain with the proper syntax, you can use the wizard at:

http://www.spfwizard.net/

To verify an SPF-record after it's in place:

http://mxtoolbox.com/spf.aspx

Read more on SPF: http://www.openspf.org/

 
Add SRV records for Lync using DirectAdmin
edited by on April 18th 2013, at 15:41
 
SPF-records (DNS)
edited by on June 8th 2011, at 14:41

A good explanation about setting up SPF-records for domains can be found here:

http://www.openspf.org/SPF_Record_Syntax

 
Troubleshooting DNS updates in AD via Event logs
by on January 1st 1970, at 01:00
To troubleshoot issues with DNS dynamic updates (e.g., certain Active Directory-joined Windows servers not properly registering their hostnames in DNS), there's an easy way to troubleshoot via the DNS Server's audit log, where DNS updates are logged. To properly filter the log for certain IP addresses or hostnames, you'll need to use custom XML filters to properly filter on the contents of the log entries because of the way the events are logged and standard filters don't provide the proper filtering.

The audit log can be found in the Event Viewer at Applications and Services logs → Microsoft → Windows → DNS-Server → Audit. Once the log is open, click on Action → Fi  ...
 
 
showing posts tagged with 'dns'
 
 
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