I do this with FMP 10 and FMS 10. I can link via the open remote/host method just as though I was on a client machine.
Don't have FMP 9 or FMS 9 to test.
Thank you for your information!
I installed FM10 instead of FM9, then it worked.
Please keep in mind that the filemaker tech folks don't recommend that you actually do this. The main problem seems to be the potential to significantly slow down server performance.
I have a robot file that logs on briefly to do a job which can't run from a server schedule. Since it logs on and off after office hours, any performance hits aren't a problem.