How to Fix Centova Cast License Error : Unable to resolve DNS

Updated: 22 October 2026 · Applies to: Centova Cast

Restarting Centova Cast can fail with a license error caused by a DNS resolution problem, showing something like:

/etc/init.d/centovacast restart
Stopping Centova Cast:
cc-imaged (not running)
cc-ftpd (not running)
cc-web (not running)
cc-comet (not running)
cc-appserver (not running)
cc-control (not running)
Starting Centova Cast:
cc-control enabled core dumps
Unable to resolve DNS for license1.centova.com (Unknown host). Check your DNS resolver settings.
- failed

This happens when the server cannot resolve DNS yet at the moment Centova Cast starts, often because it relies on a local DNS cache or resolver that is still starting up itself. A dedicated server that is not its own DNS server needs a static resolver configuration, so DNS queries work immediately once networking is up, not only after some delay.

Fix: set a static DNS resolver

1. Check your current DNS configuration in /etc/resolv.conf.
2. Edit it to use a static, reliable resolver, for example Google DNS or Cloudflare DNS:

   nameserver 8.8.8.8
   nameserver 1.1.1.1

3. Save the file.
4. Restart Centova Cast:

   /etc/init.d/centovacast restart

Before changing DNS settings on a production server, confirm with whoever manages the server that this change will not conflict with anything else relying on the current DNS setup.

If you would rather have this handled for you, our server management services cover this kind of issue, and our Centova Cast dedicated server plans come with this already configured correctly.