Client isolation

[anonymous]

I have noticed when clients connect to the WRT54G access point they can ping each other, is there a way to stop this? I have also successfully blocked access to the internal network using the ip rules in wifidog.conf, however if a client goes to www.showip.com and finds the WAN ip of my ADSL router then puts that in his web browser it brings up the admin webpage, even though the ADSL routers lan ip is in the range of blocked internal addresses. I dont have any services enabled on the WAN side of the ADSL router.