Hetzner Cloud API · Behaviour change
POST /v1/firewalls/$ID/actions/set_rules changes: CIDRs for Firewall rules not allowing host bits
Stopped working
Calls to POST /v1/firewalls/$ID/actions/set_rules on Hetzner Cloud API stopped working on December 10, 2025.
Calls it hits
POST /v1/firewalls/$ID/actions/set_rules
Starting on 10 December 2025, CIDRs specified as destination_ips or source_ips for Firewall rules will no longer allow for the host bits to be set.
Facts
- API
- Hetzner Cloud API
api.hetzner.cloud - Kind
- Behaviour change
- Takes effect
- December 10, 2025
- Calls after that day
- Fail
- Source
- Changelog
- Last updated
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