To enable arp, type 'ifconfig eth0 arp' to disable type 'ifconfig eth0 -arp' that is assuming the interface you wish to affect is eth0.

hi,
If you want to learn any applications about how they work then you can start directly by downloading its binary as well as source package.
Read source and understand how flow is going on.Make changes as per your need and enjoy the Open source world.
Thats it all you need

Hi to all,

What cmd do we use to flush arp cache?

As for my previous questions on reading source code, programs like iptables are really big..so many files involved..don't know where the program starts or ends..in what file does iptables code start?

Regards,
Visham

hi,
for flushing ARP tables you need iproute2 package http://www.ssi.bg/~ja/#iparp

Hi to all,

I disabled on the PC on which i'm doing MAC DNAT of IP traffic using ebtables. However, when I try to ping, it doesn't work. I think the ARP request is sent before MAC DNAT happens. i.e., when the IP packet is created and the Ethernet frame header is to be added. Since ARP is disabled, no request is sent and the packet is not sent to ebtables's code for MAC DNAT.

Actually, I have 3 PCs (192.168.10.1, 192.168.10.2, 192.168.10.3) with MAC addresses E1, E2 and E3 respectively. All 3 PCs are connected to the same Cisco switch.

Ipv4 traffic from E1 to E2 is MAC DNATed to E3. Hence E1 talks to E2
via E3, and vice-versa. However, I have MAC ACLs configured on the
Cisco switch. Traffic should have E3 as destination MAC address in
order to be accepted by the switch. Otherwise it is dropped.

The problem is that ARP packets are dropped as well since they have a broadcast destination MAC address. I tried MAC DNATing ARP packets to E3 but I don't know what to do when they arrive at E3. How do I fwd these arp requests to correct destination from E3? What can I do to make this system work?

Any help will be very much appreciated..

Warm regards,
Visham