I found out when following this web doc: http://portal.suse.de/sdb/en/2002/07/masq80.html
that I only get a ping response if I ping directly to my host -
and get no response if I do the broadcast ping:
If the network card tests have been successful, proceed now to test if the clients can be reached from the gateway. Use the command ping for this purpose. At least some clients should react to the command ping -c 3 -b 192.168.0.255. The output should be similar to:
WARNING: pinging broadcast address
PING 192.168.0.255 (192.168.0.255) from 192.168.0.1 : 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=255 time=0.774 ms
64 bytes from 192.168.0.2: icmp_seq=1 ttl=64 time=1.19 ms (DUP!)
64 bytes from 192.168.0.3: icmp_seq=1 ttl=255 time=1.30 ms (DUP!)
64 bytes from 192.168.0.4: icmp_seq=1 ttl=64 time=1.57 ms (DUP!)
--- 192.168.0.255 ping statistics ---
2 packets transmitted, 2 received, +3 duplicates, 0% loss, time 1010ms
rtt min/avg/max/mdev = 0.325/1.033/1.573/0.438 ms
In this example, the machines with the IP addresses 192.168.0.1 (gateway) and 192.168.0.2 to 192.168.0.4 (clients) have replied. If you know the IP address of a client, ping it directly to test the connection.