Using FreeBSD disconnected on a notebook

[Stephen Moriarty]

I'm trying to configure FreeBSD on my notebook such that when it's 
docked at the office, I'm able to take advantage of networked resources 
- NIS, amd, NFS. When I'm away, I want to selectively, and preferably 
automatically, take advantage of the more limited network resources, 
which usually includes none of the previous examples. Surely, someone 
else has already solved this. The only reference I found were relative 
to email.

At this point, my thought is to disable the above network services 
until after I've logged in, but this precludes the use of NIS to login. 
I would have to always login to a local account.

Thanks in advance for any assistance.