URLs with a Plus Character Trigger a 404 Error When Using an IIS Reverse Proxy Server
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
Symptoms
Any URL containing a plus (+) character will not work, and instead triggers a "page not found" (HTTP 404) error.
Cause
By default, the security filter in IIS denies any URL containing a "+" character.
Resolution
Enable double escaping in your IIS
web.configfile, to allow the "+" character to go through correctly. This file should be created in the virtual directory you created during the steps of Connecting Confluence with IIS 7.1 2 3 4 5 6 7 8<?xml version="1.0" encoding="UTF-8"?> <configuration> <system.webServer> <security> <requestFiltering allowDoubleEscaping="true" /> </security> </system.webServer> </configuration>
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