Ukulahla Kwezinsizakalo Zesevisi & Okwenza Zenzeke
Igama elithi Denial of Service (DoS) libhekisela ezenzakalweni ezinikezela izinhlelo kwi-computer yenethiwekhi okwesikhashana. Ukwehla kwenkonzo kungenzeka ngokungahle kwenzeke ngenxa yezenzo ezithathwe ngabasebenzisi benethiwekhi noma abaphathi, kodwa ngokuvamile zihlasela ukuhlasela kwe-DoS.
Omunye ukuhlaselwa okudumile kwe-DDoS (okungaphezulu kulawa ngezansi) kwenzeka ngoLwesihlanu, ku-Okthoba 21, 2016, futhi kwenziwa amawebhusayithi amaningi adumile angenakusetshenziswa kakhulu ngosuku.
Ukulahla Kwezinsizakalo Zenkonzo
Ukuhlaselwa kwe-DoS kusebenzisa ubuthakathaka obuhlukahlukene ebuchwepheni bekhompyutha. Kungase kuhlose amaseva , ama-network routers , noma izixhumanisi zokuxhumana zenethiwekhi. Kungabangela amakhompiyutha nama-routers ukuthi avaliwe ("crash") kanye nezixhumanisi zokugoba phansi. Ngokuvamile akubangeli ukulimala okuphakade.
Mhlawumbe inqubo eyaziwa kakhulu ye-DoS i-Ping of Death. Ukuhlasela kwe-Ping of Death kusebenza ngokukhiqiza nokuthumela imilayezo ekhethekile yenethiwekhi (ikakhulukazi, amaphakethe we- ICMP angamasayizi angalingani) abangela izinkinga zezinhlelo ezitholayo. Ezinsukwini zokuqala zeWebhu, lokhu kuhlaselwa kungabangela izinsizakalo ezingenakuvikelwa ze-Inthanethi ukuthi zivele ngokushesha.
Izingosi ze-Web zanamuhla zivame ukuvikelwa ngokumelene nokuhlasela kwe-DoS kodwa ngokuqinisekile azivikelekile.
I-Ping of Death ingomunye uhlobo lwe- buffer oluchichima ukuhlasela. Lokhu kuhlaselwa kudlula inkumbulo yekhompiyutha ehlosiwe futhi kuphule lo logic yokuhlela ngokuthumela izinto ngobukhulu obukhulu kunalokho eklanyelwe ukusingatha. Ezinye izinhlobo eziyisisekelo zokuhlaselwa kwe-DoS zihilela
- ukukhukhumeza inethiwekhi enomsebenzi ongenamsebenzi ukuze imoto yangempela ingakwazi ukuphumelela. I- TCP / IP SYN kanye nokuhlaselwa kwe- smurf yizibonelo ezimbili ezivamile.
- ukulayisha ngokweqile i-CPU yesistimu ukuze izicelo ezivumelekile zingenakucutshungulwa.
- ukushintsha izimvume noma ukwephula ukugunyazwa kwe-logic ukuvimbela abasebenzisi ukungena ngemvume ohlelweni. Isibonelo esisodwa esivamile sihilela ukuqala uchungechunge olusheshayo lwemizamo yokungena yamanga evimbela ama-akhawunti ukuba angene ngemvume.
- ukususa noma ukuphazamisa izinhlelo zokusebenza ezibucayi noma amasevisi ukuvimbela ukusebenza kwabo okujwayelekile (noma ngabe uhlelo kanye nenethiwekhi jikelele isebenzayo).
Ukuhlaselwa kwe-DoS kuvame kakhulu kumawebhusayithi ahlinzeka ngolwazi noma izinsizakalo. Izindleko zezimali zalokhu kuhlaselwa zingaba zinkulu kakhulu. Labo abathintekayo ekuhleleni noma ekusebenzeni ukuhlaselwa babhekene nokushushiswa kobugebengu njengoba kwenzeka kuJake Davis (okufanekiselwa) weqembu lokuqapha uLulzsec.
I-DDoS - Ukusatshalaliswa Kwezinsizakalo Zokusebenza
Ukwenqaba ukuhlaselwa kwezinsizakalo zendabuko kubangelwa umuntu oyedwa noma ikhompyutha. Uma kuqhathaniswa, ukuhlaselwa kwenkonzo ephikisiwe (DDoS) kuhilela amaqembu amaningi.
Ukuhlaselwa kwe-DDoS enonya kwi-intanethi, ngokwesibonelo, ukuhlela izinamba ezinkulu zamakhompyutha zibe yiqembu elididiyelwe elibizwa ngokuthi i- botnet , ekwazi ukukhukhumeza isayithi elihlosiwe nge-traffic enkulu yenethiwekhi.
I-DoS engavamile
Ukwehla kwenkonzo nakho kungabangela ngokungenhloso ngezindlela ezimbalwa:
- Abasebenzisi abaningi bazama ngokuzumayo ukufinyelela kwinethiwekhi noma iseva ngesikhathi esifanayo, njengokuvakashela isayithi lewebhu lomphakathi lapho kwenzeka khona umcimbi omkhulu womphakathi
- abalawuli benethiwekhi bavula ngokungenalutho ikhebula, noma bahlela ngokungahleliwe ama-routers
- uhlelo olunegciwane lekhompyutha noma imbungu