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?????????????????????????????????????г????TCP??ICMP????icmp???????????????????? ?????裺???????????????????? ?汾???????????????????????ж????????????汾??? ?????????????????????????????豸?????????? ????????????д?????Nmap???????棨NSE????Lua????????????????????Nmap?????????????????????????緢??ICMP ECHO/TIMESTAMP/NETMASK?????????TCPSYN/ACK????????SCTP INIT/COOKIE-ECHO?????????￡?Nmap????????????????????????????????????????
????1.      ICMP echo request
????2.      a TCP SYN packet to port 443
????3.      a TCP ACK packet to port 80
????4.      an ICMP timestamp request
???????η??????????????????????????????????????????????????????????????????????????????????????????????????ж????
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????-sL: List Scan ?б???裬?????????????IP?о?????????????????????
????-sn: Ping Scan ???????????????????ж????衣
????-Pn: ??????????????????????????????????????????
????-PS/PA/PU/PY[portlist]: ???TCPSYN/ACK??SCTP INIT/ECHO??????з????
????-PE/PP/PM: ???ICMP echo?? timestamp?? and netmask ???????????????-PO[protocollist]: ???IPЭ??????????????????
????-n/-R: -n?????????DNS??????-R??????????DNS??????
????--dns-servers <serv1[??serv2]??...>: ???DNS????????
????--system-dns: ??????????DNS??????
????--traceroute: ??????·????
????????
????1.nmap ip/????
???????ip?????????????????裬???????????????????????????
????????????www.hnu.cn???????

????2.??????
????nmap -T4 -A -v ip/????
????-A?????????y??????Aggressive???????裻-T4????????????????Timing????????6??????0-5????????????????????????????????????IDS??????ε???????????????????????????T4??-v??????????verbosity?????????????????????????????????????????????????
???????????????????????????裬????????????????????????????????????????????????е???ó????汾??????????豸????????????????·??·????
???????????www.hnu.cn?????????裬????????儷?????????Э???汾?????????????????????linux?????