TNS-12599: TNS:cryptographic checksum mismatch
Checking the alert log of some of one of the instances we have recently upgraded to 12.2 I noticed the following error message occurring frequently: NI cryptographic checksum mismatch error: 12599. VERSION INFORMATION: TNS for Linux: Version 12.2.0.1.0 – Production Oracle Bequeath NT Protocol Adapter for Linux: Version 12.2.0.1.0 – Production TCP/IP NT Protocol Adapter …