Outage in IONOS

Notification for Customers Experiencing 421 Errors in Plesk

Resolved Minor

July 17, 2025 - Started 9 months ago - Lasted 1 day
Official incident page

Incident Report

For customers experiencing a 421 error on their websites within Plesk on their servers, please note that Plesk is a third-party software. For assistance, we recommend visiting the official Plesk online help website, which should provide the necessary solutions and troubleshooting guidance. Plesk have released an article with instructions on how to solve the issue: https://support.plesk.com/hc/en-us/articles/33500191748887-Websites-hosted-in-Plesk-are-not-accessible-after-a-recent-Apache-update-421-Misdirected-Request

Trusted by 1,000+ teams

The Status Page Aggregator with Early Outage Detection

Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.

Start Free Trial

No credit card
14-day trial
2-minute setup

Latest Updates ( sorted recent to last )

IDENTIFIED 9 months ago - at 07/17/2025 08:58AM

For customers experiencing a 421 error on their websites within Plesk on their servers, please note that Plesk is a third-party software. For assistance, we recommend visiting the official Plesk online help website, which should provide the necessary solutions and troubleshooting guidance.

Plesk have released an article with instructions on how to solve the issue:

https://support.plesk.com/hc/en-us/articles/33500191748887-Websites-hosted-in-Plesk-are-not-accessible-after-a-recent-Apache-update-421-Misdirected-Request

Latest IONOS outages

Access to Cloud Panel may not be possible - about 14 hours ago

Disruption in Cloud Servers - 10 days ago

Some websites may be inaccessible - 16 days ago

Order Delay - about 1 month ago

The Status Page Aggregator with Early Outage Detection

With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.

Start free trial

No credit card required · Cancel anytime · 6320 services available

Integrations with Slack Microsoft Teams Google Chat Datadog PagerDuty Zapier Discord Webhook