Open ports & security

["Brooks R. Robinson" <brooks.robinson@rides.com>]

Greetings,
	A quick question, if you please.  I am trying to tighten up security on a
box that may be exposed to some security risk.  In doing so, I have been
trying to get rid of anything that might prove detrimental to security
(ftpd, telnetd, and other things).  I have been running nmap against my
machine, and I've come down to just a few open ports left that I have at
least mild concern about.  They are:

9	discard
13	daytime
37	time
111	sunrpc

	Now, I know that 9 will just throw away anything it gets, and that 13 and
37 just return the time (in one form or  other), so I am only trivially
concerned about them.  But what about 111?  Something in my gut says that
remote procedure call can't be all that good.
	Any information would be greatly appreciated.

TIA

Brooks