????Nmap?????
????· Open: Open?????Nmap?????????????
????· Close: Close??????????????????????????锌??????????????????????????????Close????????????小?????????????????????????????
????· Filtered: Filtered???????????????????????????Nmap????卸??????????????????锌???????????????锟�??????????????????????
????· Unfiltered: ?????ACK???????????????????????????斜???????????????????????????????????????????????婕�????TCP???????????????????????Google????
????· Open|Filtered: ??????????????????????????????????????????????????????????璺�???
????· Closed|Filtered: ???????????????????????????????????IPID Idle???
??????????????
??????????澹�???????????????些???.
???????:
????· nmap T0 [target] ?????????瑁�????IDS(????????)???
????· nmap T1 [target] ????????瑁�????0??2?????????????????些IDS
????· nmap T2 [target] ??????????????????
????· nmap T3 [target] ?????????
????· nmap T4 [target] ??????瑁�???????????????蟹????????????
????· nmap T5 [target] ??????瑁�??????????????????.
???????????
???????:
????· nmap -p [port]|(1-9999) [target] ???????(??????围)???
????· nmap -F [target] ?????????????????????nmap-services??
????· nmap -r ??????(?????nmap?????????)
????· nmap --top-ports (n) ????????????n?????
????TCP SYN???
?????????璺�?????????????????????瑁�??????????????????????????????????????????TCP???????????????SYN TCP??????????RST???????????????????SYN/ACK?????????????nmap??????????????????????????????????RST?卸??????
???????: nmap -sS [target]
????TCP ACK???
??????TCP SYN????????????ACK TCP????????????卸???????????????????????????????????RST????????????????????????ICMP??????????????Filtered??
???????: nmap -sA [target]
????TCP???????
???????????????璺�???????TCP??????????????????????????SYN????????????????????锌???????????????????????????
???????: nmap -sT [target]
?????????TCP???
??????????????????TCP?些???位???????????TCP??琛�?????????????TCP/IP?????睢�
???????: nmap --scanflags [Symbols] [target]
???????蟹????????URG??ACK??PSH??RST??SYN??FIN?????????????????
????UDP ???
?????????????UDP????????????ICMP???????????????????????????????????????????????卸??????????????????UDP???????????????????-p????????????
???????: nmap -sU -p [port list] [target]
???????????
???????:
????· nmap -sN [target] Null??瑁�?????????TCP?????????????????????RST?????????????????
????· nmap -sF [target]??FIN??瑁�??SYN??????????SYN?婊�?FIN
????· nmap -sX [target] ?????????FIN??PSH??URG???位??????RFC793?婕�??????????????RST??????????????????RFC793?????????????????????RST??
???????????
????????????????????????????璺�???????????效??????IDS???????????????????锟�??????????慰????????
??????????????:
????· ?卸????TCP???????????????????????????????TCP SYN???????????????????????SYN/ACK???????????????RST????
????· ???????SYN/ACK????????RST?????????RST??????
????· ???????????IP??????????????????????(IP ID)??????????????????????????????????????IP ID ????????????????????????????????
??????泄???:
????· ????????????????????????IP ID
????· ????????????????????伪?????????IP??SYN??????????????????????????????????????????????????SYN/ACK??????????RST??
????· ?????????????IP ID???????????????2??????????????????????????????????????????????????????????????1???????????????????????????????????????????????????2?????????????????????????
???????????????????????IP???????喂????????????????????????????IP???????????????????????????????????????????
???????: nmap -sI [zombie ip] [target ip]
?????慰?????
????IP协?????
??????????????????璺�????????????????????????TCP??UDP???????????IP协????????????????????????些IP协????
???????: nmap -sO [target]