Self Signed SSL Key and cert between log-forwarder and logstash

Elastic Stack Logstash
1

Hi
How to setup SSL Key and Cert between log-forwarder running on multiple hosts shipping logs to logstash running on multiple hosts as well?

Can we use wild card certificate?

We are able to set 1to1 log-forwarder/logstash
Thanks

2

Do you want to know how to create the certificates or how to setup LSF/LS?