Hi everybody,
I had many difficulties but now my access point is working.
the commands I entered are those:
/interface wireless set wlan1 ssid=test frequency=2442 band=2.4ghz-b/g mode=ap-bridge disabled=no
/ip address add address=10.0.0.217/24 interface=ether1
/ip address add address=192.168.0.1/24 interface=wlan1 (laptop)
/ip route add gateway=10.0.0.1
/ip firewall nat add chain=srcnat action=masquerade out-interface=ether1
/interface bridge add name="MyBridge" disabled=no
/interface bridge port add interface=ether1 bridge=MyBridge
/interface bridge port add interface=wlan1 bridge=MyBridge
However I think anyone can access to the wifi. How could I stop it, using passwords or things like that?
Thank you for your help.
Firstly, you may use access-list to allow connection for the specific MAC-addresses, set ‘default-authetncation=no’ then add access-list entries (allowed clients).
Secondly, you may encryption protocols WPA or WPA2,
http://www.mikrotik.com/testdocs/ros/2.9/interface/wireless_content.php#4.13.21.7
Ok I succeed in wrting the access-list using those commands:
/ interface wireless security-profiles set default authentication-types=wpa2-psk wpa2-pre-shared-key=1234567890
/interface wireless access-list add mac-address=xx:xx:xx:xx:xx:xx interface=wlan1 private-algo=40bit-wep private-key=1234567890
However I think the network security is not enough since in its properties, i can read it is not securised (the padlock icon is not here) and there is also no data encryption.
Could you please telle me more about that problem?
Thank you
Sorry to have to say it but, Read the manual! also use Winbox as it is a whole lot easier - really
No probs. I mostly use winbox but each to their own 
In winbox goto Wireless select the Security Profiles Tab, now create yourself a new security profile with whatever settings you need. Now goto the Interfaces tab (of the wireless window) and open the interface you want to secure, select the Wireless tab of that interface and choose your new security profile - press OK or Apply.