Fix the Hole?

I recently received a Pen-test result that I would like a little help from the experts here in patching the hole. It appears that Some industrial equipment has a firmware issue leaving port 17185 open to the public. This has been identified as VxWorks debugger. while it would take some time and possibly some re-engineering here to just replace this equipment I thought there might be a few back door possibilities as to closing the port.

I know this is the best place to find the finest minds in the hacking community.

So I believe we should be able to solve this issue.