# Handling split-horizon / split-view DNS while on our hosting

**URL:** https://meta.discourse.org/t/handling-split-horizon-split-view-dns-while-on-our-hosting/121902
**Category:** Hosted Customers
**Tags:** explanation
**Created:** [July 2, 2019, 3:57pm UTC](https://meta.discourse.org/t/handling-split-horizon-split-view-dns-while-on-our-hosting/121902 "2019-07-02T15:57:00Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Discourse](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/discourse/32/148734_2.png) [@Discourse](https://meta.discourse.org/u/Discourse)
#### Post date: [July 2, 2019, 3:57pm UTC](https://meta.discourse.org/t/handling-split-horizon-split-view-dns-while-on-our-hosting/121902/1 "2019-07-02T15:57:01Z")

</div>

Sometimes even after correctly configuring DNS for your new Discourse site hosted with us:

 ![image](https://global.discourse-cdn.com/meta/original/3X/7/c/7c416c0b49b212741d2c16b0acdb65d6f661506b.png)

You still cannot access the site and only reach an error page:

 ![image](https://global.discourse-cdn.com/meta/original/3X/8/7/873722a171477b6cba5b099de4ac65be5f6d7173.png)

If this persists for a while (nameservers will cache negative responses for a while), we will ask you to check to see if you can access from a mobile device (with Wi-Fi off).

If this allows you to access the site then the cause is likely [Split Horizon / Split View](https://en.wikipedia.org/wiki/Split-horizon_DNS) DNS:

 ![image](https://global.discourse-cdn.com/meta/original/4X/a/f/c/afc0488142d8cdc08d9e07bbeffdc655c97f27d0.jpeg)

In essence: there are two different versions of DNS for [example.com](http://example.com). The change adding the record:

```bind
community.example.com. IN CNAME example.hosted-by-discourse.com.

```

was made _only to the external version and not the internal version_.

To correct this, the record above needs to be added to the internal version to match the external version.

* * *

(n.b. there is nothing _specific_ to our hosting about this, but it comes up frequently)

> Last edited by @sam 2026-03-30T04:43:08Z
> 
> > **Check document**
> >
> > Perform check on document: