I have a question about best practices for a small LAN.  I have a NetBSD 
box which connects to a cable modem and provides NAT service to a small 
LAN on the other side.  The external network card is configured via 
dhcp.  The internal network is currently fixed IP addresses.

So my question is whats considered the best practice for dealing with 
DNS.  It seems I have several options

1)  just list the name servers in each machines resolv.conf but this 
means I have to update them all when the ISP changes their DNS servers.

2)  run a caching name server on the NAT box (it runs off a read only 
file system though with a very small MFS for /tmp) and have the internal 
machines point there for DNS.  I think the NetBSD guide talks about how 
to set this up.

3)  use IP forwarding on the NAT box to forward DNS requests to the real 
servers

4)  convert the entire internal network to use dhcp although I wonder if 
I'll have issues with NIS.  Can I use dhcp just to get name servers and 
not IP addresses?

5)  ??


So anyone have suggestions as to what "best practices" procedures would 
be here?

Thanks
-Dan