# Reverse DNS
This section is for those who want to set the Reverse DNS hostname (i.e. PTR record) for their IP Addresses. The most common use case is for Forward-confirmed Reverse DNS (opens new window) on mail servers. Currently only IPv4 Reverse DNS is supported.
Open the Manage Interface page for your interface, then find the "Reverse DNS" section. Click Edit Record, and type in the hostname that the IPv4 Address should point back to. Only Absolute Domain Names (hostnames that end in a period/dot) are supported. If you are unsure, simply type a dot after the hostname.
Like other changes to the Hoppy interface, it can take up to 10 minutes for changes to the Reverse DNS to be visible.