For incoming packets, the packet's source address is checked if it belongs to a directly connected network. If the network is directly connected, then the interface the packet came on in is compared to the interface the network is connected to. When incoming interface and directly connected interface are not the same, the packet does not match. Usage example: ipfw add deny ip from any to any not antispoof in Manpage education by: ru |
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ipfw2.c | ||
ipfw.8 | ||
Makefile |