Solution : https://service.sap.com/sap/support/notes/186119 (SAP Service marketplace login required)
Key words :
Sqlnet, security, OPS$, net8, protocol.oratcp.validnode_checking tcp.invited_nodes tcp.excluded_nodes
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| 562863 | FAQ: Logon mechanisms |
| 562403 | FAQ: Oracle Net |
| 521264 | Hang situations |
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| 194868 | tcp.validnode_checking on Oracle 64-bit |
| 72638 | Performance problems with SQL*Net |
| 39267 |