Documentation31 Aug 2026Joy Team1 min read

Networking: static IP, extra IPs and rDNS (summary)

Your IPv4 is configured for you; here is how to add more and set reverse DNS.

Each server ships with one static IPv4 from the pool of its region, configured by the guest agent before the welcome email is sent. Additional IPs (up to 8) can be ordered at deploy time or later from the Network tab; they are added to the same interface. Reverse DNS (PTR) is set from the same tab and propagates within 15 minutes.

Gateways and netmasks for your IPs are shown on the Network tab. DNS resolvers are 1.1.1.1 and 8.8.8.8 by default. The full guide, including SPF / DKIM / DMARC and forward-confirmed rDNS, is at DNS and reverse DNS.

networkrdns

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Before you start

You need a Joy account and a running server. Commands assume Ubuntu 24.04 unless stated; Windows steps are marked.

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