Re: Port Mirroring in Linux

Pascal Hambourg wrote:

Markus Rehbach a écrit :
Pascal Hambourg wrote:

As far as I can see from a quick test, setting the bridge
ageing time to zero (brctl setageingtime <brname> 0) seems to disable
learning, but the bridge still knows its own MAC addresses, so traffic
received on a port destined to one of these MAC address won't be
forwarded to other ports.

True but you could do thomething like this:

ebtables -t nat -A PREROUTING -i eth3 -p 0x0800 -j dnat --to-destination
00:01:12:12:12:12 --dnat-target ACCEPT

How is this supposed to help ?

That'll will redirect all IP (0x0800) traffic to MAC 00:01:12:12:12:12 (which
will be the MAC of other NIC), similar to the DNAT in iptables. But won't this
kill the communication, I mean instead of letting packets go to their preset
destination, this command will alter the destination. So this won't help.

HTH
--
Ashish Shukla
http://wahjava.wordpress.com/
.

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