Legacy Digital Unix 4.0d system running on an AlphaStation 1000 in a fairly
small shop, about 30 local users, a few Windows 2000 servers. Very simple
network topology with unmanaged hubs.
Until recently, most of our clients used fixed IP addresses. DNS was served
by the BIND daemon on the Unix box. We had a handful of IPs allocated to
DHCP, and DHCP services were provided by one of the Windows 2000 servers.
Our IP range was ???.???.???.0-127 so our subnet mask was 255.255.255.128.
We were given the other half of that range so we could use addresses
128-255, so ...