Symptoms

POST requests to an IdP resource URI /saml/idp/res?id=<idp_resource> results in APM not responding (the issue also occurs with URI /saml/idp/res). The issue occurs when there is no Access session established yet. After an Access session is established, POST requests complete without issue.

Impact

POST requests to the URI /saml/idp/res... result in user-agent hanging and the request never completes

Conditions

-- APM IdP Resource -- POST request to the URI /saml/idp/res... prior to Access session established

Workaround

-- Refresh the request on the user-agent -- Configure environment to have user-agent do GET request method -- iRule that redirects user-agent from POST method to GET method. For EXAMPLE: when CLIENT_ACCEPTED { ACCESS::restrict_irule_events disable } when HTTP_REQUEST { if { [HTTP::uri] contains "/saml/idp/res" && [HTTP::method] eq "POST" } { if { [ACCESS::policy result] eq "" or [ACCESS::policy result] eq "not_started" } { HTTP::respond 302 "Location" "https://[HTTP::host][HTTP::uri]" "Connection" "Close" } } }

Fix Information

None

Behavior Change