Long time ago, I ran a dozen domains or so off one IP. Then, did a colo with a lot of IP's and
have each domain running on its own.
Now I have a chance to decrease my colo costs significantly, but only 8 IP's come with the
service (I can get more, but it gets more expensive).
I can not think of any drawbacks to doing it. I only offer web, ftp and mail service (apache,
proftp and exim). The only thing I can think of is that reverse dns will not work correctly,
but I see no reason that should impact these services.
BRITANNUS(shocked): Caesar, this is not proper.
CAESAR (recovering his self-possession): Pardon him, Theodotus: he is a barbarian, and thinks
that the customs of his tribe and island are the laws of nature.
Caesar and Cleopatra, Act II
--George Bernard Shaw