尚l(wèi)inux云計(jì)算安全防火墻基礎(chǔ)類

1

3 Iptables4 5 Iptables 11？？22硬件：深信服軟件：windows

3Iptables3Iptables 33

OUTPUTFORWARDnatOUTPUTfilterOUTPUTFORWARDnatOUTPUTfilterrawOUTPUTINPUTOUTPUTFORWARDINPUT44raw—mangle—nat—入站：PREROUTING出站：OUTPUT轉(zhuǎn)發(fā)：PREROUTINGFORWARD網(wǎng)絡(luò)網(wǎng)絡(luò)5Iptables 5iptables[-tj 信息，然后傳給下一條規(guī)則繼續(xù)匹配SNAT：修改數(shù) #iptablestfilterAINPUT-ptcp-jACCEPT#iptables-IINPUT-pudp-j#iptables-IINPUT2-picmp-j#iptables-LINPUT--line-numbersChainINPUT( num

protoptudp--anywhereicmp--

#iptables-DINPUT3#iptables-n-LINPUTChainINPUT prot

udp-- icmp-- tcp-- #iptables-tfilter-PFORWARDDROP#iptables-POUTPUTACCEPT #iptables-AFORWARD-s192.168.1.11-jREJECT#iptables-IINPUT-s10.20.30.0/24-jDROP#iptables-IINPUT-picmp-j#iptables-AFORWARD-p!icmp-j#iptables-AINPUT-ieth1-s172.16.0.0/12-j#iptables-AFORWARD-s192.168.4.0/24-pudp--dport53-#iptables-AINPUT-ptcp--dport20:21-jACCEPT#iptables-AINPUT-picmp--icmp-type8-jDROP#iptables-AINPUT-picmp--icmp-type0-jACCEPT#iptables-AINPUT-picmp--icmp-type3-jACCEPT#iptables-AINPUT-picmp-jDROP多端口匹配：-mmultiport--sport-mmultiport--dport狀態(tài)匹配：-mstate--state連接狀態(tài)#iptables-AINPUT-ptcp-mmultiport--dport25,80,110,143-jACCEPT#iptables-AFORWARD-ptcp-miprange--src-#iptables-AINPUT-mmac--mac-source00:0c:29:c0:55:3f-j#iptables-PINPUT#iptables-IINPUT-ptcp-mmultiport--dport80-82,85-#iptables-IINPUT-ptcp-mstate--eth0:eth1:

(局域網(wǎng)PC4

目標(biāo)地址目標(biāo)地址

X

路由路由

#iptables-tnat-APOSTROUTING-s192.168.1.0/24-o-jSNAT--to-sourceMASQUERADE?MASQUERADE?#iptables-tnat-APOSTROUTING-s192.168.1.0/24-o-jDNATRRDNATCCDNAT

源地址源地址

路由路由

DNATeth1:

DNATDNAT#iptables-tnat-APREROUTING-ieth0-d218.29.30.31-ptcp--80-jDNAT--to-destination

由表由表1

.

DNAT#iptables-tnat-APREROUTING-ieth0-d218.29.30.31-ptcp--2346-jDNAT--to-destinationCentos7