SAP Knowledge Base Article - Preview

3223413 - 'SSSLERR_PEER_CERT_UNTRUSTED' error when connecting to SAP Cloud Integration using RFC


You are trying to connect from sender system to SAP Cloud Integration using RFC connection, but it is failing with '403 - Forbidden'. And when you checked the ICM Trace (of sender side) you could see the following error:

  • [Thr <thr_no>] The peer's X.509 Certificate (chain) is untrusted
    [Thr <thr_no>] SapSSLSessionStartNB()==SSSLERR_PEER_CERT_UNTRUSTED
    [Thr <thr_no>] SSL:SSL_read() failed (536872221/0x2000051d)
    [Thr <thr_no>] => "Failed to verify peer certificate. Peer not trusted."



  • SAP Integration Suite
  • SAP Business Technology Platform
  • Cloud Integration


Cloud Integration all versions ; SAP Integration Suite all versions


Cloud Integration, SAP Integration Suite, SAP Cloud Platform Integration, Cloud Platform Integration, SAP CPI, CPI, SCPI, HANA Cloud Integration, HCI, SAP HCI, tenant, iFlow, Integration Flow, 403, RFC, ICM, Trace, SSL, Certificate, Trusted, Trust, X.509, Security, WebRFC, Untrusted, Forbidden, Abap, Sender , KBA , LOD-HCI-PI-CON-SOAP , SOAP Adapter , Problem

About this page

This is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP for Me (Login required).

Search for additional results

Visit SAP Support Portal's SAP Notes and KBA Search.