Changing ssh listening port

[effemmeffe]

I'd like to access my raspberry from outside of my LAN so I opened a new door on my router to ssh from office.
The problem is that if I open the port 22 I get a lot of script kid poking my ssh and I'd rather not.
I want to change the default port for ssh from 22 to a higher unused one.
But I noticed that changing /etc/ssh/sshd_config has no effect. After some digging I discovered that ssh is launched by inetd with the line:

Code:

xbian@xbian ~ $ cat /etc/inetd.conf | grep ssh
ssh  stream  tcp  nowait  root   /usr/sbin/tcpd /usr/sbin/sshd -i
xbian@xbian ~ $

and the ssh port is defined in

Code:

xbian@xbian ~ $ cat /etc/services | grep ssh
ssh        22/tcp                # SSH Remote Login Protocol
ssh        22/udp
xbian@xbian ~ $

How do I change the ssh port?
Do I need to define a new service in /etc/services and launch it with inetd?

Code:

my_new_ssh        2222/tcp                # SSH Remote Login Protocol on high port
my_new_ssh        2222/udp

my_new_ssh  stream  tcp  nowait  root   /usr/sbin/tcpd /usr/sbin/sshd -i

I'm running beta2:

Code:

xbian@xbian ~ $ cat /etc/xbian_version  
1.0Beta2
xbian@xbian ~ $