Hi Guys an hello! I hope you can help me with my problem!
That's the situation: my uncle has a small lan at home with 2 desktops and printers, internet via a broadband modem with router/switch, no wifi.
Now he wants wifi added for his son.
Ok, no rocket sience. I had an old unused Linksys WRT54GL. I flashed it with an OpenWrt image with LuCI, set LAN interface to static IP (same subnet as modem of course), gateway and DNS to IP of broadband router, disabled DHCP Server (because DHCP is enabled on broadband router), WIFI to AP and interface to DHCP.
Everything works fine, WIFI clients get IP from LAN and can access internet.
But here comes the problem: my uncle wants to block WIFI clients from accessing LAN, they should just use internet. I tried firewall settings and iptables, but nothing works. I'm not a newbie to OpenWrt but still a beginner.
Any ideas? Many thx!