Firewall yog dab tsi thiab nws yog hom twg?
Hauv kab lus no, peb yuav kawm ua ke txog dab tsi yog firewall thiab dab tsi yog hom firewall kom ntxaws.
Ua ntej, firewall yog dab tsi?
Lub firewall yog lub network kev ruaj ntseg ntaus ntawv uas saib xyuas cov ntaub ntawv ntws mus thiab los ntawm koj lub khoos phis tawj hla cov tes hauj lwm uas nws txuas nrog, tso cai lossis thaiv cov tsheb hauv thiab tawm raws cov txheej txheem kev nyab xeeb ua ntej.
Nws lub hom phiaj, tau kawg, yog tsim kom muaj kev thaiv ntawm koj lub khoos phis tawj lossis lub network sab hauv thiab sab nrauv uas nws txuas nrog, hauv kev rau siab tiv thaiv kev txav ntawm cov ntaub ntawv tsis zoo xws li kab mob lossis nyiag nkas.
Lub firewall ua haujlwm li cas?
Qhov twg firewalls txheeb xyuas cov ntaub ntawv nkag thiab tawm raws li cov cai tau teev tseg, lim cov ntaub ntawv los ntawm cov chaw tsis muaj kev nyab xeeb lossis tsis txaus ntseeg, tiv thaiv kev tuaj yeem tawm tsam koj lub khoos phis tawj lossis khoos phis tawj txuas nrog koj lub network sab hauv, uas yog, lawv ua raws li kev tiv thaiv ntawm lub computer txuas cov ntsiab lus, cov ntsiab lus no cov chaw nres nkoj, ntawm cov ntaub ntawv sib pauv nrog cov khoom siv sab nraud.
Hom firewall twg?
Firewalls tuaj yeem yog software lossis kho vajtse, thiab qhov tseeb, nws zoo dua kom muaj ob hom.
Lawv yog cov khoos phis tawj uas tau teeb tsa hauv txhua lub khoos phis tawj los ua lawv txoj haujlwm hauv kev tswj hwm cov ntaub ntawv los ntawm cov chaw nres nkoj thiab cov ntawv thov.
Qhov twg, cov khoom siv hluav taws xob tiv thaiv hluav taws xob yog cov khoom siv lub cev tso nruab nrab ntawm lub network sab nraud thiab koj lub khoos phis tawj uas koj txuas nrog, uas yog, lawv sawv cev rau kev sib txuas ntawm koj lub khoos phis tawj thiab lub network sab nraud.
Firewalls yog hom Packet_Filtering.
Feem ntau hom firewalls,
Nws txheeb xyuas cov ntaub ntawv pob thiab thaiv lawv txoj kev hla yog tias lawv tsis sib xws nrog txoj cai kev nyab xeeb yav tas los tau teev tseg hauv cov firewalls. Hom no txheeb xyuas qhov chaw ntawm cov ntaub ntawv ntim khoom thiab tus IP chaw nyob ntawm cov khoom siv uas tau muab los ntawm lawv, rau cov txheej txheem hais uas tau hais los saum no.
Generation Qhov thib ob firewalls
((Next-generation firewalls (NGFW))
Nws suav nrog hauv nws tsim cov thev naus laus zis ntawm cov khoom siv hluav taws xob ib txwm muaj, ntxiv rau lwm cov haujlwm xws li encrypted pass-checking, tiv thaiv kev tiv thaiv kab mob, tiv thaiv kab mob, thiab nws tseem muaj qhov tshwj xeeb ntawm kev sib sib zog nqus DPI pob ntawv thib ob (NGFW) muaj DPI txhawm rau txheeb xyuas thiab tshuaj xyuas cov ntaub ntawv hauv pob, ua kom tus neeg siv txheeb xyuas tau zoo dua thiab txheeb xyuas cov ntawv phem.
● Proxy Firewalls
(Npe firewalls)
Hom firewall no ua haujlwm ntawm qib thov, tsis zoo li lwm cov firewalls, nws ua raws li tus neeg nruab nrab nruab nrab ntawm ob qhov kawg ntawm qhov system, qhov twg cov neeg siv khoom txhawb nqa nws yuav tsum xa qhov kev thov mus rau lub firewall ntawm hom no kom raug tshuaj xyuas. txoj cai ruaj ntseg tso cai lossis tiv thaiv cov ntaub ntawv xa mus rau kev tshuaj xyuas. Dab tsi txawv ntawm hom no yog tias nws saib xyuas kev mus los raws li qhov hu ua Txheej Txheem XNUMX txheej txheem xws li HTTP thiab FTP, thiab tseem muaj qhov tshwj xeeb ntawm kev sib sib zog nqus DPI pob ntawv tshuaj xyuas thiab ua haujlwm lossis xeev cov txheej txheem firewall.
● Network chaw nyob txhais lus (NAT) firewalls
Cov firewalls no tso cai rau ntau lub cuab yeej nrog IP chaw sib txawv los sib txuas ua ke rau lwm lub network nrog ib tus IP chaw nyob, yog li cov neeg tawm tsam, uas tso siab rau network scanning ntawm IP chaw nyob, tsis tuaj yeem tau txais cov ntsiab lus tshwj xeeb txog cov cuab yeej tiv thaiv los ntawm hom firewall no. Hom firewall no zoo ib yam li Proxy firewalls nyob rau hauv uas lawv ua raws li tus neeg nruab nrab nruab nrab ntawm tag nrho cov cuab yeej uas lawv txhawb thiab sab nraud network.
● Stateful multilayer soj ntsuam (SMLI) firewalls
Nws lim cov pob ntawv cov ntaub ntawv ntawm qhov txuas txuas thiab qib thov, los ntawm kev sib piv lawv rau yav dhau los paub thiab ntseeg tau cov ntaub ntawv pob khoom, thiab zoo li hauv NGFW firewalls, SMLI ntsuas tag nrho cov ntaub ntawv pob ntawv thiab tso cai rau nws hla yog tias nws tshaj txhua txheej thiab qib ntawm kev tshuaj xyuas, nws kuj txiav txim siab hom kev sib txuas thiab nws cov xwm txheej txhawm rau txhawm rau kom ntseeg tau tias txhua qhov kev sib txuas lus tau pib ua tsuas yog nrog cov peev txheej ntseeg tau.
Thiab koj nyob hauv kev noj qab haus huv zoo tshaj plaws thiab kev nyab xeeb ntawm peb cov neeg nyiam
