First of all

NODE=10.100.2.9

is not legal, and MYDOMAIN is supposed to contain the space-separated list
of all DNS names that the machine is known by in DNS.  It is not your
corporate root domain.  So:

NODE=[10.100.2.9]
MYDOMAIN=[10.100.2.9]

That being said, you really should make a DNS entry somewhere and give
this host a name.  I realize it's on your Intranet but many sites use
an internal DNS.  Using the bracketed IP is really only useful for testing
purposes.

Nathan