Hi,
Nothing to do with bridging setups or firewalling but something
(seemingly) simple: can you sniff networks on the other side of a bridge?
Eg if there is a machine, 192.168.0.1 on one side of a bridge and another
machine 192.168.0.10 on the other side of the bridge could one machine
sniff the network activity of another with something like
tcpdump host 192.168.0.10 (from 192.168.0.1)
I've tried it here and whilst you can sniff traffic on the same side of
the bridge, the other seems to not come through. I've also tried on the
bridge itself, using -i eth0/eth1 as well to no avail.
The bridge also runs ipchains, with pretty strict rules.
So, is the lack of sniffing ability due to the bridging itself? Or is it
the firewall? Or am I missing something brainnumbingly obvious?
Cheers,
JB (trying to show a fellow admin his webmail is wide open to sniffing ;0)
--
John Bland M.Phys (Hons) AMInstP / \ PhD Student & Sys Admin
Email: j.bland at cmp.liv.ac.uk / \ Condensed Matter Group
http://ringtail.cmp.liv.ac.uk/ / \ Liverpool University
"Hey, you never know until you try." -- Jack Burton
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