Simple DNS Plus
Edit this page

Did you notice something wrong or unclear, or want to add something more to this page?

Great !!

You can edit the source text of this page on GitHub (click here to learn how).

After you submit your changes ("pull request"), we will review it and update the page.

Does Simple DNS Plus support split-horizon / split-view / BIND views?

Some DNS server implementations have a feature where you can have different versions of a zone served to different clients based on which IP address the DNS request originates from. This is often referred to split-horizon, split-view, or BIND views.

Typically this feature is used to handle the situation where clients on a private LAN need to access a server using a private IP address and clients from the Internet need to access the same server using a public IP address.

Simple DNS Plus does not have the ability to serve different versions of the same zone, but it does have a couple of features that allow you to serve different records based on the IP address origin of each request:

NAT IP Alias

The simplest way to serve private/public IP addresses (as described above) is the "NAT IP Alias" feature, which is found in the Options dialog / DNS / NAT IP Alias section:

With the configuration show above - any request from for a host record that points to - will be served a "cloned" host record pointing to

So rather than maintaining duplicates of one or more zones, you can simply configure this in one place.

Fixed IP Address plug-in

The NAT IP Alias feature (see above) provides one-to-one mapping between public and private IP addresses.

You may need more fine grained control - for example if you have different host names pointing to a single public IP address, but this is mapped to different internal IP addresses via NAT or reverse-proxy.

In this case, you can use the Fixed IP Address plug-in.

Assuming that you have configured a normal DNS zone with your public DNS records, you can override these records individually for requests coming from your LAN using this plug-in.

For example to point "" to for users from (your LAN) only, you could setup a Fixed IP Address plug-in as follows:

From the main window, click the "Plug-ins" button:

Click the "Add" button:

Select "Fixed IP Address" and click the "Create instance..." button:

Enter the IP address "" (the private IP address of the web-server):

Click the "DNS Requests" tab, change the "Process DNS requests" drop-down to "Only when...", click the "Add" button, select "Sender's IP address", select "is in list..."

In the "DNS request access rule" window, click the "Add..." button:

In the "IP address(es)" window, select "IP address subnet", enter the first LAN IP address "", leave the subnet mask at " (/24)" and click the "OK" button:

Also click the "OK" button in the "DNS request access rule" window.

Back in the "Fixed IP Address Plug-In Instance" window, click the "Add" button, select "Requested domain name", select "is...":

Enter the host name "" and click the "OK" button:

Back in the "Fixed IP address Plug-In Instance" window, click the "OK" button:

Back in the "Plug-in instances" window, select the new plug-instance and click the "Up" button, to have the plug-in process requests before local zones:

Finally, click the "OK" button:

Related KB articles:

Simple DNS Plus

  • Home
  • Search
  • Product details

  • Features
  • Screen shots
  • Plug-ins
  • Tools & Add-ons
  • Testimonials
  • What's new
  • Release notes
  • Download

  • Download
  • Buy

  • Pricing
  • New license
  • Additional license
  • Upgrade
  • Support

  • Overview
  • Lost License Key
  • Knowledge Base
  • Online documentation
  • Contact us