Hello group, I have some strange problem with the "snull" network driver mentioned in the book "Linux Device Drivers" by Alessandro Rubini (O'Reily publications). I have downloaded from the ftp site. I have built the driver and loaded in the kernel. I am using kernel-2.2.14. I have set the networks in /etc/networks - snullnet0 192.168.0.0 snullnet1 192.168.1.0 I have set the hosts in /etc/hosts - 192.168.0.88 local0 192.168.0.99 remote0 192.168.1.99 local1 192.168.1.88 remote1 After loading the module I have done - %ifconfig sn0 local0 %ifconfig sn1 local1 %route add -net snullnet0 netmask 255.255.255.0 sn0 %route add -net snullnet1 netmask 255.255.255.0 sn1 After setting up all these when I do ping to remote1, I do not reply messages as expected. I can print all the data sent in the tx function, even the rx function gets called which does netif_rx(skb). Can anyone who has referred this driver, please help me on what is the problem, as it is urgent. The ping to other nodes on the LAN works. Expecting your reply soon. Regards Vinay - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org