My network have 2 computers, the host is 192.168.0.1 for ip and I set the client one to 192.168.0.2 . But when I do a ping localhost on the client, he return 127.0.0.1 as ip address ? So when im on the host and ping 127.0.0.1, the host "see" the client with a correct response. But when I'm on the client and ping 192.168.0.1, the client see nothing ?