is it possible to change default Cassandra ports such as port 9042 to another user specified port on ubuntu/Debian where Cassandra installed package installation method?
Yes, it is. You just need to change the native_transport_port in cassandra.yaml and restart DSE for the changes to take effect.
The only caveat is that the package installation runs as the cassandra OS user so it is only possible to specify ports higher than 1024 since ports in the lower range are reserved and can only be used by root user.
For details, see Configuration in the DSE Docs. Cheers!
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