I've received different impressions from some of the information that I've
read about BM 3.8 and NAT. Then I see a post from Cat saying "yes,
provided that the CIsco is not doing NAt (for BM3.6). With BM3.8 should
work in any case."

So, to ask the question clearly of those most likely to know: Can a BM
3.8 server be positioned behind a NAT router, with a single interface, and
work correctly with a client PC which is also behind a NAT router
(assuming that the private network ranges are different, of course)?

I'm considering an upgrade to SBS6.5, which has BM3.8, and this feature
will allow me to continue considering it.