A.iptables-FINPUT-d192.168.0.2-ptcp--dport22-jACCEPT B.iptables-AINPUT-d192.168.0.2-ptcp--dport23-jACCEPT C.iptables-AFORWARD-d192.168.0.2-ptcp--dport22-jACCEPT D.iptables-AFORWARD-d192.168.0.2-ptcp--dport23-jACCEPT
A.物理層 B.數(shù)據(jù)鏈路層 C.網(wǎng)絡(luò)層 D.應(yīng)用層
A.filter B.firewall C.nat D.mangle