Do I need these ports open?

[Simon Slater]

	Hi all,

	Just a quick question arising from following another thread.  Here is
the result of nmap on a FC6 box:

$ nmap localhost

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2007-04-18 14:10
EST
Interesting ports on localhost.localdomain (127.0.0.1):
Not shown: 1670 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
25/tcp   open  smtp
111/tcp  open  rpcbind
139/tcp  open  netbios-ssn
445/tcp  open  microsoft-ds
631/tcp  open  ipp
670/tcp  open  unknown
696/tcp  open  unknown
946/tcp  open  unknown
2049/tcp open  nfs

Nmap finished: 1 IP address (1 host up) scanned in 2.036 seconds
$ 

	What are the 3 "unknown" open ports?  Also I cannot find rpcbind,
netbios-ssn nor microsoft-ds under System>Services.  What are these
services for?

Thanks
Simon