rndc (Named)

Hello All,

This is the output of my

nmap -sT -sU -p 1-65535 localhost

********************OutPut***********************
Starting nmap V. 2.54BETA31 ( www.insecure.org/nmap/ )
Interesting ports on localhost (127.0.0.1):
(The 131048 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp
25/tcp     open        smtp
53/tcp     open        domain
53/udp     open        domain
80/tcp     open        http
110/tcp    open        pop-3
143/tcp    open        imap2
443/tcp    open        https
465/tcp    open        smtps
953/tcp    open        rndc   <<<<<<<< *************:(:(
993/tcp    open        imaps
995/tcp    open        pop3s
2082/tcp   open        unknown
2083/tcp   open        unknown
2084/tcp   open        unknown
2086/tcp   open        unknown
2087/tcp   open        unknown
2095/tcp   open        unknown
2096/tcp   open        unknown
3306/tcp   open        mysql
6666/tcp   open        irc-serv
56222/udp  open        unknown


Nmap run completed -- 1 IP address (1 host up) scanned in 70 seconds

When i do
/usr/sbin/lsof -i tcp:953
***********OutPut************************************
COMMAND   PID USER   FD   TYPE  DEVICE SIZE NODE NAME
named   14142 root   21u  IPv4 9919024       TCP localhost:rndc (LISTEN)
named   14144 root   21u  IPv4 9919024       TCP localhost:rndc (LISTEN)
named   14145 root   21u  IPv4 9919024       TCP localhost:rndc (LISTEN)
named   14146 root   21u  IPv4 9919024       TCP localhost:rndc (LISTEN)
named   14147 root   21u  IPv4 9919024       TCP localhost:rndc (LISTEN)

I can kill these Pids but why Named(Bind) is shown there and why it goes on
953 port ?

is it harmful having such thing???

Help me?? :(

Regards,
Tina