06-17-2011
You're right, bridge mode should have direct communication.
If you can ping in both directions, ping is not blocked, so your title's a bit misleading. And if you can ping I think your connection's good and likely unfirewalled.
Perhaps you need to force nmap to use a specific network interface? Bridge mode can involve some network trickery that might confuse things which try to operate at a low level. Run ifconfig on the host to see what interface connects where.
It could also be that nmap can't scan your client because it really doesn't have any network services running.
And just to rule out the firewall, you can do /sbin/iptables-save on both hosts to see if it prints anything.
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