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Unable to access System Manager WebUI when HTTPS Port number does not match ONTAP Port number

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ontap-system-manager
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OM
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Applies to

  • ONTAP System Manager
  • OnCommand System Manager 9.4P5 and later
  • ONTAP 9.4P5 and later

Issue

  • Unable to access System Manager WebUI from remote host when Port 443 is forwarded to another port by ssh port forwarding.
  • Apache-error.log

[Thu Oct 09 18:38:22.327216 2025 +0000] [dot:error] [pid 7865:tid 34404141312] [client <client ip>:47798] [vserver ID 4294967295][service security] Rejecting a possible CSRF attempt with header Origin. Port must be 443. Found <PORT> in value https://localhost:<PORT>.

 

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