We are testing a study on routing logs from an e-mail security product we have used to the SIEM environment. In this context, we carried out studies using free or community versions of different SIEM products.
The logs transmitted to Splunk were sent encrypted with TLS as they were transmitted to other products. However, the logs we see on Splunk cannot be decrypted and come in the below.
Example output: \x00 \x00 \xFC m\xDF qs\x81\xF2^8g&&\xB3B\xDF\xF9\xD5
I checked the config files in Splunk and it already supported TLS.