Uchishandisa Netcat: mimwe inoshanda mirairo

$ nc -l 2389

Zvakare, tinogona kuishandisa ku batanidza isu kuchiteshi (2389), ichangobva kuvhurwa:

$ nc localhost 2389

Zvino kana tikanyora padivi pe mutengi, inosvika padhuze ne servidor:

$ nc localhost 2389
HI, server

Mune terminal uko iyo servidor:

$ nc -l 2389
HI, server

Taona muenzaniso wemashandisirwo nekita yevatengi-server kutaurirana.

2.-Shandisa Netcat kuendesa mafaera:

netcat inogona kushandiswa kuendesa mafaera. Padivi re mutengi Ngatitii tine faira inonzi 'testfile' ine:

$ cat testfile
hello testfile

uye kudivi re servidor tine faira risina chinhu rinonzi 'test'.

Iye zvino isu tiri kudivi ne servidor:

$ nc -l 2389 > test

uye isu tinomhanya mutengi seinotevera:

cat testfile | nc localhost 2389

Kana isu tichitarisa iyo 'bvunzo' faira mune iyo servidor:

$ cat test
Hello testfile

Takachinjisa data kubva mutengi al servidor.

3.-Netcat inotsigira nguva dzekubuda:

Dzimwe nguva patinovhura chinongedzo hatidi kuti igare yakavhurika nekusingaperi, saka kugadzirisa dambudziko iri tinoshandisa sarudzo -w, kuitira kuti mushure me x huwandu hwemasekondi kubatana pakati pevatengi-server kwakavharwa.

Server:

$nc -l 2389

Mutengi:

$ nc -w 10 localhost 2389

Kubatana kuchavharwa mushure memasekonzi gumi.

Cherechedza: haufanire kushandisa sarudzo -w nesarudzo -l kudivi re servidor kubvira -w yaisazove nemhedzisiro uye nekudaro kubatana kwacho kwaizoramba kwakavhurika nekusingaperi.

4.-Netcat inotsigira IPV6:

Zvisarudzo -4 y -6 vanomanikidza netcat iyo inoshandisa iyo IPv4 kana IPv6 protocol zvichiteerana.

Server:

$ nc -4 -l 2389

Mutengi:

$ nc -4 localhost 2389

Zvino, kana isu tikateedzera iwo murairo netstat, taizoona:

$ netstat | grep 2389
tcp 0 0 localhost:2389 localhost:50851 ESTABLISHED
tcp 0 0 localhost:50851 localhost:2389 ESTABLISHED

Iyo yekutanga paramende yezviri pamusoro kuburitsa dai yaive IPv6 yaizoratidza 6 mushure mekatcp, asi sekushandisa kwedu IPv4 tiratidze chete tcp

.

Zvino, ngatimanikidzei Najat kuti ishandise IPv6:

Server:

$nc -6 -l 2389

Mutengi:

$ nc -6 localhost 2389

Kumhanya netstat zvakare taizoona:

$ netstat | grep 2389
tcp6 0 0 localhost:2389 localhost:33234 ESTABLISHED
tcp6 0 0 localhost:33234 localhost:2389 ESTABLISHED

Tinogona kuona kuti tcp yave kuperekedzwa sei nechitanhatu, zvichiratidza kushandiswa kwe IPv6.

5.-Dzima kuverenga ne STDIN yeNetcat:

Uku kushanda kunowanikwa kuburikidza nesarudzo -d. Mumuenzaniso uyu tinozviita padivi revatengi:

Server:

$ nc -l 2389

Mutengi:

$ nc -d localhost 2389
Hi

Iwo Hi mavara haazotumirwe kuseva sezvo kuverenga kuburikidza STDIN kwave kuremadzwa.

6.-Force Netcat kuti ugare wakamuka:

Kana isu tine sevha inomhanya uye iyo mutengi inodonhedza, iyo servidor zvakare inopera:

Server:

$ nc -l 2389

Mutengi:

$ nc localhost 2389
^C

Server:

$ nc -l 2389
$

Isu taigona kuona mumuenzaniso wapfuura kuti kana iyo mutengi inovhara kubatana zvakare iyo servidor Saka chii chatingaite? Mhinduro yedu ndeye kushandisa sarudzo -k, iyo inomanikidza sevha kuti irambe ichimhanya.

Server:

$ nc -k -l 2389

Mutengi:

$ nc localhost 2389
C^

Server:

$ nc -k -l 2389

Takazviona izvozvo servidor ramba uchimhanya kunyangwe mutengi yakabviswa, nekuda kwesarudzo -k iyo yatinowedzera kuseva.

7.-Gadzira Netcat kuti ugare wakamuka mushure meEOF:

netcat yakagadzirirwa kuitira kuti mushure mekugamuchira iyo EOF(End Of File) kumisa kubatana, kazhinji izvi ndizvo zvinoitika, asi isu tinogona kugadzirisa iyi default maitiro e netcat Kuwedzera sarudzo -q. Iyi sarudzo inoraira netcat Inofanira kumirira x nhamba yemasekonzi isati yavhara kubatana.

Mutengi:

El mutengi inofanira kutanga seinotevera:

nc -q 5 localhost 2389

Iye zvino chero nguva iyo mutengi inogamuchira EOF inomirira masekondi mashanu isati yavhara kubatana.

8.-Shandisa Netcat pamusoro peUDP:

Default netcat inoshandisa chirevo chekutaurirana TCP, asi isu tinogona zvakare kushandisa UDP nesarudzo -u.

Server:

$ nc -4 -u -l 2389

Mutengi:

$ nc -4 -u localhost 2389

Iye zvino mutengi y servidor ivo vari kushandisa protocol UDP Zvekutaurirana kwako, tinogona kutarisa izvi kuburikidza nemurairo netstat.

$ netstat | grep 2389
udp 0 0 localhost:42634 localhost:2389 ESTABLISHED

Zvakanaka, panguva yekutumira taona mimwe mienzaniso yekushandiswa kwe netcat, vanogona kunzwisisa kuti chishandiso chakasiyana-siyana, ndosaka banga reSwiss Army

, pano tinopa chete zvimwe zvacho zvekuita, sekugara kana iwe uchida rumwe ruzivo: murume nc, uye iwe uchaona zvese zvinogona kuitwa nechishandiso ichi. Kusvikira inotevera posvo uye Kufara Kugura !!!

Chinyorwa chakatorwa kubva vanhu.