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NetworkingFloating IP

Floating IP

Keep a public IPv4 reserved in the project after VM or gateway delete, and attach it to another VM or gateway later.

How it works

In hostd Public Cloud, a Floating IP is a real public IPv4 assigned directly to the WAN interface of your VM or Cloud Gateway — not a separate virtual address mapped through 1:1 NAT, as in a typical OpenStack floating IP.

  • The address lives on the instance itself; traffic to that IP reaches the VM or gateway without an extra overlay or proxy hop.
  • Inside the guest OS you see the same public address on the network interface (for example net0 on a VM).
  • Floating means the IPv4 stays in your project when you delete the VM or gateway, so you can attach it to another resource later — not that the address is virtual.

Before you begin

  • A public IPv4 assigned to a VM or Cloud Gateway, or already reserved in the project.

Steps

  1. Check the address in Network → Public IPs.
  2. When deleting a VM or gateway, turn off Release public IP address to keep the IP reserved in the project.
  3. When creating another VM or gateway, select the reserved IP instead of Auto.
  4. To change the public IP on the same VM: in Resize VM, turn WAN (net0) off, save, then turn WAN on again and choose Auto or another reserved address.

Watch out

  • While WAN is on, you cannot swap to another address directly — turn the public interface off first.
  • Changing the WAN IP does not require a VM reboot.

Next steps

Network mapPTR / reverse DNS