29 Hagnýt dæmi um NMAP skipanir fyrir Linux kerfis-/netkerfisstjóra

Nmap aka Network Mapper er opinn uppspretta og mjög fjölhæfur tól fyrir Linux kerfi/netkerfisstjóra. Nmap er notað til að kanna netkerfi, framkvæma öryggisskannanir, netúttekt og finna opnar hafnir á ytri vél. Það leitar að lifandi gestgjöfum, stýrikerfum, pakkasíur og opnum gáttum sem keyra á ytri gestgjöfum.

Ég mun fjalla um mest af NMAP notkun í tveimur mismunandi hlutum og þetta er fyrsti hluti nmap alvarlegur. Hér í þessari uppsetningu hef ég notað tvo netþjóna án eldveggs til að prófa virkni Nmap skipunarinnar.

192.168.0.100 – server1.linux-console.net
192.168.0.101 – server2.linux-console.net

# nmap [Scan Type(s)] [Options] {target specification}

Hvernig á að setja upp NMAP í Linux

Flestar Linux dreifingar í dag eins og Red Hat, CentOS, Fedoro, Debian og Ubuntu hafa innihaldið Nmap í sjálfgefnum pakkastjórnunargeymslum sínum sem kallast APT. Bæði verkfærin eru notuð til að setja upp og stjórna hugbúnaðarpökkum og uppfærslum. Til að setja upp Nmap á dreifingu, notaðu eftirfarandi skipun.

# yum install nmap		[on Red Hat based systems]

$ sudo apt-get install nmap	[on Debian based systems]

Þegar þú hefur sett upp nýjasta nmap forritið geturðu fylgst með leiðbeiningunum í þessari grein.

1. Skannaðu kerfi með hýsingarheiti og IP tölu

Nmap tólið býður upp á ýmsar aðferðir til að skanna kerfi. Í þessu dæmi er ég að framkvæma skönnun með því að nota hýsingarnafn sem server2.linux-console.net til að komast að öllum opnum höfnum, þjónustu og MAC vistfangi á kerfinu.

 nmap server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 15:42 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.415 seconds
You have new mail in /var/spool/mail/root

 nmap 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 11:04 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.465 seconds
You have new mail in /var/spool/mail/root

2. Skannaðu með „-v“ valkostinum

Þú getur séð að skipunin hér að neðan með -v valkostinum gefur ítarlegri upplýsingar um ytri vélina.

 nmap -v server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 15:43 EST
Initiating ARP Ping Scan against 192.168.0.101 [1 port] at 15:43
The ARP Ping Scan took 0.01s to scan 1 total hosts.
Initiating SYN Stealth Scan against server2.linux-console.net (192.168.0.101) [1680 ports] at 15:43
Discovered open port 22/tcp on 192.168.0.101
Discovered open port 80/tcp on 192.168.0.101
Discovered open port 8888/tcp on 192.168.0.101
Discovered open port 111/tcp on 192.168.0.101
Discovered open port 3306/tcp on 192.168.0.101
Discovered open port 957/tcp on 192.168.0.101
The SYN Stealth Scan took 0.30s to scan 1680 total ports.
Host server2.linux-console.net (192.168.0.101) appears to be up ... good.
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.485 seconds
               Raw packets sent: 1681 (73.962KB) | Rcvd: 1681 (77.322KB)

Skannaðu marga gestgjafa

Þú getur skannað marga gestgjafa með því einfaldlega að skrifa IP-tölur þeirra eða hýsilnöfn með Nmap.

 nmap 192.168.0.101 192.168.0.102 192.168.0.103

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:06 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 3 IP addresses (1 host up) scanned in 0.580 seconds

4. Skannaðu allt undirnet

Þú getur skannað allt undirnet eða IP svið með Nmap með því að gefa * algildisstaf með því.

 nmap 192.168.0.*

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:11 EST
Interesting ports on server1.linux-console.net (192.168.0.100):
Not shown: 1677 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
111/tcp open  rpcbind
851/tcp open  unknown

Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 256 IP addresses (2 hosts up) scanned in 5.550 seconds
You have new mail in /var/spool/mail/root

Á úttakinu hér að ofan geturðu séð að nmap skannaði allt undirnet og gaf upplýsingar um þá véla sem eru uppi á netinu.

5. Skannaðu marga netþjóna með síðasta áttundu IP tölu

Þú getur framkvæmt skannanir á mörgum IP-tölum með því að tilgreina síðasta áttund af IP-tölu. Til dæmis, hér er ég að framkvæma skönnun á IP tölum 192.168.0.101, 192.168.0.102 og 192.168.0.103.

 nmap 192.168.0.101,102,103

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:09 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 3 IP addresses (1 host up) scanned in 0.552 seconds
You have new mail in /var/spool/mail/root

6. Skannaðu lista yfir vélar úr skrá

Ef þú hefur fleiri vélar til að skanna og allar hýsingarupplýsingar eru skrifaðar í skrá, geturðu beint beðið nmap um að lesa þá skrá og framkvæma skannanir. Við skulum sjá hvernig á að gera það.

Búðu til textaskrá sem kallast „nmaptest.txt“ og skilgreindu allar IP tölur eða hýsingarheiti þjónsins sem þú vilt skanna.

 cat > nmaptest.txt

localhost
server2.linux-console.net
192.168.0.101

Næst skaltu keyra eftirfarandi skipun með „iL“ valmöguleikanum með nmap skipuninni til að skanna allar skráðar IP tölur í skránni.

 nmap -iL nmaptest.txt

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 10:58 EST
Interesting ports on localhost.localdomain (127.0.0.1):
Not shown: 1675 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
25/tcp  open  smtp
111/tcp open  rpcbind
631/tcp open  ipp
857/tcp open  unknown

Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 3 IP addresses (3 hosts up) scanned in 2.047 seconds

7. Skannaðu IP-tölusvið

Þú getur tilgreint IP svið á meðan þú gerir skönnun með Nmap.

 nmap 192.168.0.101-110

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:09 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 10 IP addresses (1 host up) scanned in 0.542 seconds

8. Skanna netkerfi að fjarlægum gestgjöfum undanskildum

Þú getur útilokað suma véla á meðan þú framkvæmir fulla netskönnun eða þegar þú ert að skanna með jokertáknum með „–útiloka“ valkostinum.

 nmap 192.168.0.* --exclude 192.168.0.100

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:16 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 255 IP addresses (1 host up) scanned in 5.313 seconds
You have new mail in /var/spool/mail/root

9. Skannaðu OS upplýsingar og Traceroute

Með Nmap geturðu greint hvaða stýrikerfi og útgáfa er í gangi á ytri vélinni. Til að virkja uppgötvun stýrikerfis og útgáfu, handritaskönnun og traceroute, getum við notað „-A“ valkostinn með NMAP.

 nmap -A 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:25 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE VERSION
22/tcp   open  ssh     OpenSSH 4.3 (protocol 2.0)
80/tcp   open  http    Apache httpd 2.2.3 ((CentOS))
111/tcp  open  rpcbind  2 (rpc #100000)
957/tcp  open  status   1 (rpc #100024)
3306/tcp open  mysql   MySQL (unauthorized)
8888/tcp open  http    lighttpd 1.4.32
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
SInfo(V=4.11%P=i686-redhat-linux-gnu%D=11/11%Tm=52814B66%O=22%C=1%M=080027)
TSeq(Class=TR%IPID=Z%TS=1000HZ)
T1(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T4(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T7(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
PU(Resp=Y%DF=N%TOS=C0%IPLEN=164%RIPTL=148%RID=E%RIPCK=E%UCK=E%ULEN=134%DAT=E)

Uptime 0.169 days (since Mon Nov 11 12:22:15 2013)

Nmap finished: 1 IP address (1 host up) scanned in 22.271 seconds
You have new mail in /var/spool/mail/root

Í úttakinu hér að ofan geturðu séð að nmap kom með TCP/IP fingrafar af stýrikerfinu sem keyrir á ytri vélum og er nákvæmari um höfnina og þjónustuna sem keyra á ytri vélunum.

10. Virkja OS uppgötvun með Nmap

Notaðu valkostinn -O og -osscan-giska hjálpar einnig við að uppgötva OS upplýsingar.

 nmap -O server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:40 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
SInfo(V=4.11%P=i686-redhat-linux-gnu%D=11/11%Tm=52815CF4%O=22%C=1%M=080027)
TSeq(Class=TR%IPID=Z%TS=1000HZ)
T1(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T4(Resp=Y%DF=Y%W=0%ACK=O%Flags=Option -O and -osscan-guess also helps to discover OS
R%Ops=)
T5(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T7(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
PU(Resp=Y%DF=N%TOS=C0%IPLEN=164%RIPTL=148%RID=E%RIPCK=E%UCK=E%ULEN=134%DAT=E)

Uptime 0.221 days (since Mon Nov 11 12:22:16 2013)

Nmap finished: 1 IP address (1 host up) scanned in 11.064 seconds
You have new mail in /var/spool/mail/root

11. Skannaðu gestgjafa til að greina eldvegg

Neðangreind skipun mun framkvæma skönnun á ytri hýsil til að greina hvort einhverjar pakkasíur eða eldveggur er notaður af hýsil.

 nmap -sA 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:27 EST
All 1680 scanned ports on server2.linux-console.net (192.168.0.101) are UNfiltered
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.382 seconds
You have new mail in /var/spool/mail/root

12. Skannaðu gestgjafa til að athuga hvort hann er varinn af eldvegg

Til að skanna gestgjafa ef hann er varinn af einhverjum pakkasíunarhugbúnaði eða eldveggjum.

 nmap -PN 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:30 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.399 seconds

13. Finndu út lifandi gestgjafa í neti

Með hjálp „-sP“ valmöguleikans getum við einfaldlega athugað hvaða gestgjafar eru í beinni og uppi á netinu, með þessum valkosti sleppir nmap gáttaskynjun og öðru.

 nmap -sP 192.168.0.*

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 11:01 EST
Host server1.linux-console.net (192.168.0.100) appears to be up.
Host server2.linux-console.net (192.168.0.101) appears to be up.
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 256 IP addresses (2 hosts up) scanned in 5.109 seconds

14. Framkvæmdu hraðskönnun

Þú getur framkvæmt hraðskönnun með „-F“ valmöguleikanum til að leita að höfnunum sem skráðar eru í nmap-services skránum og skilja eftir allar aðrar hafnir.

 nmap -F 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:47 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1234 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.322 seconds

15. Finndu Nmap útgáfu

Þú getur fundið út Nmap útgáfu sem þú ert að keyra á vélinni þinni með -V valkostinum.

 nmap -V

Nmap version 4.11 ( http://www.insecure.org/nmap/ )
You have new mail in /var/spool/mail/root

16. Skannaðu höfn í röð

Notaðu -r fánann til að slemba ekki.

 nmap -r 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:52 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.363 seconds

17. Prenta Host tengi og leiðir

Þú getur fundið út hýsilviðmót og leiðarupplýsingar með nmap með því að nota „–iflist“ valkostinn.

 nmap --iflist

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:07 EST
************************INTERFACES************************
DEV  (SHORT) IP/MASK          TYPE     UP MAC
lo   (lo)    127.0.0.1/8      loopback up
eth0 (eth0)  192.168.0.100/24 ethernet up 08:00:27:11:C7:89

**************************ROUTES**************************
DST/MASK      DEV  GATEWAY
192.168.0.0/0 eth0
169.254.0.0/0 eth0

Í úttakinu hér að ofan geturðu séð að kortið sýnir tengi sem eru tengd við kerfið þitt og viðkomandi leiðir.

18. Leitaðu að tiltekinni höfn

Það eru ýmsir möguleikar til að uppgötva höfn á ytri vél með Nmap. Þú getur tilgreint gáttina sem þú vilt að nmap skanni með -p valmöguleikanum, sjálfgefið skannar nmap aðeins TCP tengi.

 nmap -p 80 server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:12 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT   STATE SERVICE
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) sca

19. Skannaðu TCP tengi

Þú getur líka tilgreint sérstakar gáttargerðir og númer með nmap til að skanna.

 nmap -p T:8888,80 server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:15 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT     STATE SERVICE
80/tcp   open  http
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.157 seconds

20. Skannaðu UDP tengi

 nmap -sU 53 server2.linux-console.net

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:15 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT     STATE SERVICE
53/udp   open  http
8888/udp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.157 seconds

21. Skannaðu margar hafnir

Þú getur líka skannað margar tengi með því að nota valkostinn -p.

 nmap -p 80,443 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 10:56 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT    STATE  SERVICE
80/tcp  open   http
443/tcp closed https
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.190 seconds

22. Skannaðu tengi eftir netsviði

Þú getur skannað gáttir með sviðum með því að nota tjáningar.

  nmap -p 80-160 192.168.0.101

23. Finndu útgáfunúmer Host Services

Við getum fundið út útgáfur þjónustunnar sem keyra á ytri gestgjöfum með „-sV“ valkostinum.

 nmap -sV 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:48 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE VERSION
22/tcp   open  ssh     OpenSSH 4.3 (protocol 2.0)
80/tcp   open  http    Apache httpd 2.2.3 ((CentOS))
111/tcp  open  rpcbind  2 (rpc #100000)
957/tcp  open  status   1 (rpc #100024)
3306/tcp open  mysql   MySQL (unauthorized)
8888/tcp open  http    lighttpd 1.4.32
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 12.624 seconds

24. Skannaðu ytri gestgjafa með TCP ACK (PA) og TCP Syn (PS)

Stundum lokar pakkasíunareldveggir á staðlaðar ICMP ping beiðnir, í því tilviki getum við notað TCP ACK og TCP Syn aðferðir til að skanna fjarstýri.

 nmap -PS 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:51 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.360 seconds
You have new mail in /var/spool/mail/root

25. Skannaðu fjarhýsil fyrir tilteknar höfn með TCP ACK

 nmap -PA -p 22,80 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:02 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT   STATE SERVICE
22/tcp open  ssh
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.166 seconds
You have new mail in /var/spool/mail/root

26. Skannaðu fjarhýsil fyrir tilteknar höfn með TCP Syn

 nmap -PS -p 22,80 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:08 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
PORT   STATE SERVICE
22/tcp open  ssh
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.165 seconds
You have new mail in /var/spool/mail/root

27. Framkvæmdu laumuskönnun

 nmap -sS 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:10 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.383 seconds
You have new mail in /var/spool/mail/root

28. Athugaðu algengustu tengi með TCP Syn

 nmap -sT 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:12 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 0.406 seconds
You have new mail in /var/spool/mail/root

29. Framkvæmdu tcp núllskönnun til að blekkja eldvegg

 nmap -sN 192.168.0.101

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 19:01 EST
Interesting ports on server2.linux-console.net (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE         SERVICE
22/tcp   open|filtered ssh
80/tcp   open|filtered http
111/tcp  open|filtered rpcbind
957/tcp  open|filtered unknown
3306/tcp open|filtered mysql
8888/tcp open|filtered sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)

Nmap finished: 1 IP address (1 host up) scanned in 1.584 seconds
You have new mail in /var/spool/mail/root

Það er það með NMAP í bili, ég mun koma með fleiri skapandi valkosti NMAP í seinni hluta okkar af þessu alvarlega. Þangað til, fylgstu með okkur og ekki gleyma að deila dýrmætum athugasemdum þínum.