Outage in Fly.io
IPv6 networking issues on some hosts
Minor
October 18, 2025 - Started about 17 hours ago
Official incident page
Official incident page
Incident Report
We're investigating IPv6 connectivity issues on a small number of hosts in the SJC region. Machines on impacted hosts may see inbound/outbound connectivity issues over IPv6. IPv4 connections for these hosts are not impacted.
Components affected
Fly.io SJC - Sunnyvale, California (US)One place to monitor all your cloud vendors. Get instant alerts when an outage is detected.
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Latest Updates ( sorted recent to last )
IDENTIFIED
about 17 hours ago - at 10/18/2025 12:17AM
We've identified the problem and confirmed that the IPv6 connectivity issues are intermittent. The problem stems from a faulty network switch in our SJC region, and we're working with our upstream provider to get it resolved.
If you're seeing issues here, please consider disabling IPv6 if you app doesn't need it, or moving Machines to a different region. This issue only affects outbound IPv6 traffic in SJC.
INVESTIGATING
about 17 hours ago - at 10/17/2025 11:53PM
We're investigating IPv6 connectivity issues on a small number of hosts in the SJC region. Machines on impacted hosts may see inbound/outbound connectivity issues over IPv6. IPv4 connections for these hosts are not impacted.
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