I am new to OpenWRT.
I installed it, got a WAN ip using DHCP from my ISP.
Then I did an nmap scan to check open/vulnerable ports.
I was a bit shocked to see that three ports were open 22,53 and 80.
My understanding was that the WAN side should have no ports open at all.
There is a difference on the ports when connected through the WAN or LAN, but i dont want the ports to show up as open at all !
I managed to close the port 22 by turning SSH off and on again ( no idea what happpened ).
Then I disabled the web interface(/etc/init.d/uhttpd stop)
Now the last open port is port 53, I cant figure out how to close this one for incomming traffic on the WAN, or is this nessesary for the DNS in some strange way?