Many Let's Encrypt renewals had errors today
摘要
该状态页记录了 Let's Encrypt 生产环境 API 在 6 月 18–19 日期间出现的降级表现，部分客户端在证书签发/续期过程中可能收到 400 或 500 错误，但多数请求仍然成功。问题与两个数据中心之间的上游网络事件有关，导致流量被重新路由，同时服务方在与上游 ISP 排查问题，并在“冗余能力降低”的情况下维持运行。随后状态更新显示系统整体仍在运行，但受网络影响稳定性下降。各主要组件（如 ACME API、门户与日志服务）状态显示为 operational，但存在短期性能波动与成功率下降情况。
荐读理由
Let's Encrypt 的 ACME 生产 API 出现降级与跨数据中心网络事件，导致部分证书续期请求返回 400/500 错误，从而需要临时关注自动续期任务的成功率与重试机制是否受影响
原文
Active Incident
Updated a few seconds ago
Updated a few seconds ago
Support for Let's Encrypt services is community-based and information on current status and outages can be found at: https://community.letsencrypt.org
API Degraded PerformanceOperational
Incident Status
Operational
Components
acme-v02.api.letsencrypt.org (Production), portal.letsencrypt.org (Production)
Locations
High Assurance Datacenter 1, High Assurance Datacenter 2
June 19, 2026 04:45 UTC
INVESTIGATING
We're operating normally, but with reduced redundancy. We continue to work with our upstream ISP to identify and resolve the issue.
June 18, 2026 16:35 UTC
INVESTIGATING
We re-routed traffic to bring success rates back to normal after an upstream network event disrupted traffic between two datacenters.
June 18, 2026 16:04 UTC
INVESTIGATING
Let's Encrypt's production API is experiencing degraded performance. Some clients may encounter 400 and 500 error responses. Most clients are still succeeding.
acme-v02.api.letsencrypt.org (Production)
Operational
acme-staging-v02.api.letsencrypt.org (Staging)
Operational
portal.letsencrypt.org (Production)
Operational
portal-staging.letsencrypt.org (Staging)
Operational
*.c.lencr.org (Production) **
Operational
stg-*.c.lencr.org (Staging) **
Operational
Website **
Operational
log.twig.ct.letsencrypt.org **
Operational
log.sycamore.ct.letsencrypt.org **
Operational
log.willow.ct.letsencrypt.org **
Operational
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