mi nqma kak da raboti kakto go pravish,
zashoto -m mac match-vaneto raboti samo za
FORWARD pravilata vyv veriga FILTER (tazi deto e
default) :)

az po princip pravq slednoto:

(eth0 - vytreshen, eth1 - vynshen iface)

iptables -P FORWARD DROP
iptables -m mac -A FORWARD -s x.x.x.x -d 0.0.0.0/0
--mac-source y:y:y:y:y:y -j ACCEPT
iptables -A FORWARD -s 0.0.0.0/0 -d x.x.x.x -j ACCEPT

(tova se griji izhodqshtiq trafik samo ot tozi
mac adres da se prehvyrlq kydeto i da bilo)

posle si pravish MASQUERADE pravilata:
iptables -t nat -A POSTROUTING -s x.x.x.x -d 0.0.0.0/0
-j MASQUERADE

cheers
anton ;]

p.s.: izvinqvai, zabravih da ti kaja tva ot samoto na4alo

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