[Samba] valid characters in domain name

[Steve Feehan]

Hi. Sorry if this is a FAQ but I couldn't find the answer.

What are the valid characters in a samba domain/workgroup name? 
Specifically, is the '.' character allowed? Would 'SBB.UVM.EDU' 
be a valid domain name? Or would a '-' or '_' be more 
appropriate?

I tried to use '.' in a domain name once before. It didn't work 
so I reverted to a dot-free name. Later I found that there is a 
15 character limit on domain names. I'm wondering if this was 
the cause of the domain name not being valid rather than the 
existance of the dot.

Thanks.

-- 
Steve Feehan