How to "Lock" domain?
Registrar Lock allows you to lock your domain to prevent it from being transferred away without your authorization. So it will gain ' clientTransferProhibited ' status.
To Lock your domain please follow the steps:
1. Log in into your nic.st account;
2. Choose your domain from 'Domain' section;
3. On the left side bar you can see 'Registrar Lock'. Click on it ;
4. There will be option 'Enable/Disable'. Choose desired one.