Unable to edit pages while running Confluence behind Kemp Load Balancer
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
Problem
In Confluence 6.x, it is not possible to edit pages. Reviewing the browser console or a HAR file, we can see WebSocket issues.
Diagnosis
Environment
Confluence 6.x
Kemp Load Balancer with firmware version below 7.2.37.1
Firefox web browser
Cause
There is a known issue (PD-8097) with Kemp Load Balancer regarding handling WebSockets requests in firmware versions previous to 7.2.37.1, as we can see on the page below:
Solution
Resolution
Upgrade Kemp Load Balancer firmware to version 7.2.37.1 or above.
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