Outage in IONOS
Notification for Customers Experiencing 421 Errors in Plesk
Resolved Minor
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Outage Details
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 Updates ( sorted recent to last )
IDENTIFIED
5 days 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
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