Default port of Remote must be 9200, default port of Sidecar must be anything other than 9200. This allows starting a Remote Elasticsearch Server on 9200 before Portal starts Sidecar elsewhere, no conflicts.
This kind of confusion happens often while debugging or experimenting with embedded mode vs remote mode. With Sidecar replacing Embedded, the time is right to solve this issue.
Requires the ability to tell Sidecar what port range to use. (