HI

I have two machine Host A and Host B. Host A has ethernet card and Host B has ethernet card and wifi card running in ad hoc mode. i want to ping from my ethernet card the Host B's wifi card. My ethernet cards are in same subnet while the wifi card on Host B is in different subnet. how can i ping this using iptables or netfilter hooks i am using fedora 7
Thanks in advance

You talk about two different subnets...please give more details on the network: e.g router(s), IP settings (static or DHCP), etc.

If you do ifconfig on a box to get the IP#, can you then ping that IP from another box?

HI
Thanks for reply
I am giving static IPs
Host A
ethernet Ip
192.168.1.1
Host B
ethernet
192.168.1.2
wifi
192.168.2.1

I am not using any router. To perform ping across subnet i give Host own Ip as the default gateway
I have successfully able to ping two systems with different subnets on ethernet
I also has successfully ping the systems using wifi cards in different subnets in the same way
Now what i want to do is to ping from 192.168.1.1, the wifi (192.168.2.1)
i think i should use iptables but i dont know how

How are these machines connected? If there is no router, how do you connect 3 nodes and give them distinct IPs?

Please give complete details on the network--what is each computer connected to?, what provides the internet connection?, etc.

I have two machines as under

Machine A

ethernet IP
192.168.1.1

Machine B

ethernet IP
192.168.1.2
WiFi IP
192.168.2.1

we are using class-less routing. I have these machines connected through a switch. I want to use HOST B as a special purpose gateway between LAN and WLAN users. So i want almost all traffic coming at ethernet card of Host B to be routed on the Wi-Fi card of Host B. and similarly all the traffic coming on Wi-Fi of host B to be routed on Ethernet card of Host B. I hope IPtables can do the job for me.

Secondly I want to make some changes before forwarding these packets from one network to other (say from LAN to WLAN). I thing netfilter hooks or something similar will be benificial for me. what commands should i use from IPtables and what events should i register to alter (temper the data packets) the traffic.

- Make sure both NIC's are up (ifconfig eth0 up; ifconfig wlan0 up)
- Turn on IP Forwarding (sysctl net.ipv4.ip_forward=1)

Thats it. It should work