SAP Knowledge Base Article - Public

3098230 - Possible issues when accessing SAP Analytics Cloud from a Reverse proxy URL

Symptom

Customers using a reverse proxy URL to access SAC could face possible issues listed below if the REVERSE_PROXY_HOST setting is NOT configured (System>> Administration >> System Configuration) prior to the coming Q1 2022 QRC update:

  • Any traffic with X-Custom-Host headers will be blocked (Login to the tenant from the reverse proxy url will fail.)
  • Custom links will no longer work

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

Environment

  • SAP Analytics Cloud (Enterprise) 2022
  • Reverse Proxy

Reproducing the Issue

  1. Try to logon to SAC or use Custom links.
  2. Notice the errors:
    1. The page does not exist (i.e. custom links are failing)
    2. The requested resource is forbidden (reverse proxy traffic is blocked)

Cause

  • Support for accessing SAC through a reverse proxy URL is being phased out in two stages:
    1. In QRC1 2022 a Reverse Proxy can continue to be used but only if the SAC configuration setting specifies the reverse proxy
    2. Later in 2022 (TBA), the setting is phased out and Reverse Proxy traffic is permanently blocked

Resolution

  • Short-term Solution (Workaround) for Stage 1 prior to QRC1 2022:
    • Populate the REVERSE_PROXY_HOST setting in the SAC (System>> Administration >> System Configuration) window
      Rev_proxy.jpg

  • Long-term Solution for Stage 2 later in 2022:
    • Customers using a reverse proxy with their SAC tenant are asked to migrate off this connectivity method.
    • SAP Analytics Cloud will be removing this feature permanently later in 2022, please reach out to your account team if you require additional information.

See Also

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Keywords

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Product

SAP Analytics Cloud 1.0