So I have several devices over which I have no control accessing internet over my router, I want to globally disallow access to one single fixed internet IP address, nothing more nothing less. After hour of googling and inputting firewall rules out the wazoo I got to the realm of suggestions of using reverse proxies and such to achieve the result and I just give up. All my hosts on the lan can still ping this wan ip.
Is there any easy way to accomplish this?
when any host connected to my router tries to ping aaa.bbb.ccc.ddd they will get destination unreachable.