nmap을 사용하여 로컬 네트워크를 ping 스캔하려고 시도하지만 확실하게 살아있는 시스템을 찾지 못하는 것 같습니다. 핑에 응답하지만 핑 스캔에 응답합니다.
핑 결과 :
$ ping 192.168.0.2
PING 192.168.0.2 (192.168.0.2): 56 data bytes 64 bytes from 192.168.0.2: icmp_seq=0 ttl=64 time=1.585 ms
그리고 tcpdump의 출력 :
$ tcpdump -i fxp0 -n host 192.168.0.2
12:43:07.624911 IP 192.168.0.222 > 192.168.0.2: ICMP echo request, id 61023, seq 0, length 64
12:43:07.625029 IP 192.168.0.2 > 192.168.0.222: ICMP echo reply, id 61023, seq 0, length 64
그러나 nmap을 사용하려고하면 응답을 받음에도 불구하고 그것을 볼 수 없습니다.
$ nmap -sn 192.168.0.2
Starting Nmap 5.61TEST5 ( http://nmap.org ) at 2012-05-13 12:44 CEST
Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
Nmap done: 1 IP address (0 hosts up) scanned in 3.02 seconds
Tcpdump 출력 :
$ tcpdump -i fxp0 -n host 192.168.0.2
12:45:30.742933 IP 192.168.0.222 > 192.168.0.2: ICMP echo request, id 2715, seq 0, length 8
12:45:30.742974 IP 192.168.0.222.36388 > 192.168.0.2.443: S 3607279099:3607279099(0) win 1024 <mss 1460>
12:45:30.743001 IP 192.168.0.222.36388 > 192.168.0.2.80: . ack 3607279099 win 1024
12:45:30.743025 IP 192.168.0.222 > 192.168.0.2: ICMP time stamp query id 45449 seq 0, length 20
12:45:30.743061 IP 192.168.0.2 > 192.168.0.222: ICMP echo reply, id 2715, seq 0, length 8
12:45:30.743097 IP 192.168.0.2.443 > 192.168.0.222.36388: S 2602942480:2602942480(0) ack 3607279100 win 5840 <mss 1460>
12:45:30.743130 IP 192.168.0.222.36388 > 192.168.0.2.443: R 3607279100:3607279100(0) win 0
12:45:30.743134 IP 192.168.0.2.80 > 192.168.0.222.36388: R 3607279099:3607279099(0) win 0
12:45:30.743148 IP 192.168.0.2 > 192.168.0.222: ICMP time stamp reply id 45449 seq 0: org 00:00:00.000, recv 11:04:04.243, xmit 11:04:04.243, length 20
12:45:32.745245 IP 192.168.0.222 > 192.168.0.2: ICMP time stamp query id 48722 seq 0, length 20
12:45:32.745281 IP 192.168.0.222.36389 > 192.168.0.2.80: . ack 3607344634 win 1024
12:45:32.745307 IP 192.168.0.222.36389 > 192.168.0.2.443: S 3607344634:3607344634(0) win 1024 <mss 1460>
12:45:32.745340 IP 192.168.0.2 > 192.168.0.222: ICMP time stamp reply id 48722 seq 0: org 00:00:00.000, recv 11:04:06.245, xmit 11:04:06.245, length 20
12:45:32.745380 IP 192.168.0.2.80 > 192.168.0.222.36389: R 3607344634:3607344634(0) win 0
12:45:32.745401 IP 192.168.0.2.443 > 192.168.0.222.36389: S 2629695507:2629695507(0) ack 3607344635 win 5840 <mss 1460>
12:45:32.745421 IP 192.168.0.222.36389 > 192.168.0.2.443: R 3607344635:3607344635(0) win 0
12:45:32.745431 IP 192.168.0.222 > 192.168.0.2: ICMP echo request, id 38289, seq 0, length 8
12:45:32.745517 IP 192.168.0.2 > 192.168.0.222: ICMP echo reply, id 38289, seq 0, length 8
nmap이 호스트 가 요청에 응답 할 때 다운 되는 이유는 무엇 입니까?
편집하다
Nmap 버전 :
$ nmap --version
Nmap version 5.61TEST5 ( http://nmap.org )
Platform: i386-portbld-freebsd7.4
Compiled with: liblua-5.1.5 openssl-0.9.8q libpcre-8.30 libpcap-0.9.8 nmap-libdnet-1.12 ipv6
Compiled without:
방화벽의 첫 번째 필터 규칙은 다음과 같습니다.
pass quick on fxp0
nmap --version
,nmap --iflist
그리고 당신이, nmap-dev@insecure.org에 여기 Nmap은 개발자 메일 링리스트를 게시합니다.