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  1. #1

    how traffic on loopback works


    How is local generated traffic on loopback different from traffic which goes through physical interfaces?

    Does traffic on loopback go through iptables or ipsec tables sad and spd ?

    I try this: 'ping -I eth0 <eth0_ip>' but my sniffer catches this again on loopback. What happens ?

    Thank you.

  2. #2
    Linux Newbie dilbert's Avatar
    Join Date
    Sep 2006
    Lima, Peru
    Second question I canot answer, but if the network stack figures out that the target IP address is on the same computer, it sends the traffic by default to the loopback. Otherwise it could simply discard it; what else should it do?

    Don't you get a message when pinging like "cannot bind to specific iface" and "operation not permitted"?
    Bus Error: Passengers dumped. Hech gap yo'q.

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