Kev tiv thaiv DDoS rau lub website tsis yog tsuas yog qhib ib qho kev xaiv hauv hosting xwb. Shared hosting feem ntau vam khom tus neeg muab kev pabcuam cov txheej txheem lim, VPS tuaj yeem raug tiv thaiv ntawm txheej network tabsis tseem yuav tsum tswj daim ntawv thov ntawm koj tus kheej, hos CDN tiv thaiv DDoS tau zoo tshaj thaum nws ua tus reverse proxy thiab zais lub origin server. Tshwj xeeb, cov kev tawm tsam HTTP niaj hnub no tsom rau DDoS txheej 7 uas siv tau cov request raug cai los ua kom PHP, WordPress, database lossis API ua haujlwm hnyav dhau.
Yog xav xaiv txoj kev daws teeb meem kom raug, koj yuav tsum faib ua peb lo lus nug: cov traffic raug thaiv rau qhov twg, tiv thaiv txheej twg, thiab cov traffic phem puas tuaj yeem hla lub system mus tau lossis tsis tau.
Kev tiv thaiv DDoS rau lub website sib txawv li cas ntawm shared hosting, VPS thiab CDN?
| Hom infrastructure | Feem ntau txheej twg raug tiv thaiv | Leej twg teeb tsa? | Qhov muaj zog | Qhov txwv tseem ceeb | Haum rau |
|---|---|---|---|---|---|
| Shared hosting | Feem ntau yog L3/L4 ntawm qib tus neeg muab kev pabcuam; qee pob muaj WAF | Tus neeg muab kev pabcuam | Tsis tas siv zog tswj ntau, tus nqi qis | Tsis tuaj yeem tswj firewall, rate limit thiab cov peev txheej tshwj xeeb | Blog, lub website qhia xov xwm me me |
| VPS | Nyob ntawm tus neeg muab kev pabcuam; feem ntau yog L3/L4 | Koj thiab tus neeg muab kev pabcuam | Muaj cai teeb tsa operating system, web server thiab WAF tag nrho | CPU, RAM thiab bandwidth tseem tuaj yeem tag; L7 yuav tsum tsim koj tus kheej | Daim ntawv thov uas xav tau cai tswj hwm |
| CDN reverse proxy | L3/L4 thiab L7 nyob ntawm qhov kev pabcuam, nrog cache thiab WAF | Tus neeg muab CDN thiab koj | Lim traffic ntawm edge, txo cov request mus txog origin | Yog origin qhov IP lossis lwm lub port raug nthuav tawm, qhov zoo yuav ploj | Lub website rau pej xeem, API, lag luam online |
| CDN ua ke nrog WAF | L3/L4, L7, bot thiab rate limiting | Koj tsim txoj cai; CDN ua raws thiab siv | Tiv thaiv URL, method, header thiab tus cwj pwm | Yuav tsum kawm cov cai kev ruaj ntseg, zam kev thaiv cov neeg siv raug cai yuam kev | Lub website muaj login, API thiab kev lag luam |
Qhov yuav tsum nco yog tias “muaj DDoS protection” tsis txhais tias “lub website yuav online tas li”. Piv txwv, DigitalOcean piav qhia tias txheej DDoS uas txuas nrog rau Droplet yog kev tiv thaiv L3/L4 thiab tsis muab kev tiv thaiv L7; thaum dhau lub peev xwm txo kev tawm tsam, tus neeg muab kev pabcuam yuav blackhole cov traffic, ua rau txawm cov request raug cai los kuj nkag tsis tau (raws li DigitalOcean Documentation).
Shared hosting: yooj yim tabsis vam khom tus neeg muab kev pabcuam tag nrho
Ntawm shared hosting, ntau lub website siv tib lub server thiab tib txoj kab txuas. Tus neeg muab kev pabcuam feem ntau muaj cov lim ntawm ntug network, firewall, load balancer lossis txoj cai siv tau txais thaum kuaj pom traffic txawv txav. Txawm li ntawd los, koj feem ntau tsis paub meej txog tus ciam lim, lub sijhawm teb, txoj kev xử lý HTTP flood lossis cov peev txheej tshwj xeeb ntawm koj tus account.
Shared hosting tej zaum txaus rau lub website uas muaj traffic tsawg, tabsis tsis tsim nyog suav tias yog txoj kev daws teeb meem tiv thaiv DDoS tshwj xeeb. Thaum muaj kev tawm tsam ua rau cov connection lossis PHP request nce, tus neeg muab kev pabcuam yuav txwv account, kaw lub website ib ntus lossis thov kom hloov mus rau pob siab dua. Module xws li mod_evasive tsuas muaj txiaj ntsig thaum server tseem muaj bandwidth thiab peev xwm ua haujlwm txaus; cov ntaub ntawv cPanel kuj ceeb toom tias qhov txheej txheem no hloov tsis tau txheej tiv thaiv ntawm firewall thiab router (raws li cPanel Documentation).
VPS: muaj cai tswj ntau dua tabsis tsis txhais tias muaj kev nyab xeeb dua lawm
VPS tso cai rau koj teeb tsa Nginx lossis Apache, firewall, Fail2ban, cache, kev txwv connection thiab WAF. Qhov no yog qhov zoo loj thaum xav tau tiv thaiv DDoS rau VPS. Tabsis muaj cai tswj hwm kuj txhais tias muaj lub luag haujlwm: koj yuav tsum hloov kho operating system, kaw cov port uas tsis tsim nyog, saib xyuas log thiab npaj txoj kev daws thaum CPU, RAM lossis bandwidth raug siv tas sai dhau.
Firewall ntawm VPS tuaj yeem thaiv IP, port lossis protocol, tabsis feem ntau cawm tsis tau ntawm HTTP flood uas faib los ntawm ntau txhiab qhov chaw nyob. Yog request twb mus txog Nginx thiab hu PHP lossis nug database lawm, kev thaiv ntawm daim ntawv thov tej zaum twb lig dhau lawm. Yog li, VPS yuav tsum muab tso rau tom qab CDN/WAF thaum lub website muaj kev pheej hmoo raug tawm tsam L7.
Koj tuaj yeem saib daim ntawv qhia kev ruaj ntseg Ubuntu Server los txhim kho qhov kev teeb tsa thawj zaug, tom qab ntawd kuaj web server, firewall thiab access log raws li txhua qhov kev pabcuam.
DDoS txheej 7: Vim li cas CDN tiv thaiv DDoS thiaj xav tau WAF thiab rate limiting?
DDoS L3/L4 feem ntau tsom rau bandwidth, TCP, UDP lossis protocol. Ntawm qhov tod tes, DDoS txheej 7 xa HTTP/S request uas zoo li yog tus neeg siv tiag, xws li hu nplooj tshawb nrhiav, login, lub tawb nqa khoom lossis API uas siv peev txheej ntau tsis tu ncua. Ib qho request raug cai uas rov ua dua ntawm qhov ceev siab kuj tseem tuaj yeem ua rau PHP worker, connection pool lossis database tsis muaj peev xwm.
CDN pab txo lub nra los ntawm kev khaws cache thiab muab cov peev txheej zoo li qub ntawm edge. Thaum cov ntsiab lus twb raug cache lawm, request tsis tas yuav mus txog origin (raws li Cloudflare Learning Paths). Txawm li ntawd los, CDN tsis tuaj yeem cache txhua nplooj ntawv dynamic thiab tsis nkag siab nws tus kheej tias endpoint twg kim dua endpoint twg. Nov yog ntu uas WAF thiab rate limiting yuav tsum tuav.
WAF lim cov ntsiab lus thiab cov ntsiab lus ntawm request
WAF tuaj yeem tshuaj xyuas URI, HTTP method, header, cookie, lub teb chaws, IP lub koob npe, query qauv thiab cov cim qhia tias yog bot. Koj tuaj yeem kom muaj challenge rau traffic uas xav txawv, thaiv request mus rau cov kev tswj hwm lossis txwv cov method uas tsis tsim nyog.
Tsis tsim nyog teeb WAF kom thaiv dav dav tsuas yog vim yog ib qho User-Agent lossis ib lub teb chaws. Botnet tuaj yeem faib cov IP chaw nyob, ua txuj ci li browser thiab hloov header. Txoj cai zoo feem ntau muab ntau lub cim qhia los ua ke: txoj kev nkag, zaus, response code, login xwm txheej thiab tus cwj pwm hauv ib ncua sijhawm.
Rate limiting tiv thaiv cov endpoint uas kim
WAF thiab rate limiting pab txhawb ib leeg. WAF txiav txim seb request puas tsim nyog ntseeg; rate limiting txwv seb ib tus client lossis ib pab client yuav hu tau ib qho peev txheej pes tsawg zaus hauv ib ncua sijhawm. Cloudflare tso cai teeb cov xwm txheej raws expression, tus yam ntxwv suav, ncua sijhawm, request threshold thiab kev nqis tes xws li block, challenge lossis throttle (raws li Cloudflare WAF Documentation).
Ib qho piv txwv pib rau lub website WordPress:
/wp-login.php: siv challenge thaum ib IP dhau qhov login ua tsis tiav uas tau pom hauv kev siv tiag./wp-admin/: cia tsuas yog cov neeg siv uas twb txheeb xyuas tiav lossis IP tus tswj hwm uas tsim nyog./xmlrpc.php: tua yog lub website tsis siv, lossis txwv kom nruj./searchthiab API endpoint: teeb threshold kom qis dua nplooj ntawv kab lus vim txhua request yuav nug database.- Tsis txhob siv tib threshold rau cov neeg siv, crawler uas raug cai thiab API key sib txawv.
Tsis tsim nyog suav tias rate limiting yog ib lub txee uas raug kiag li. Cloudflare ceeb toom tias lub txee yuav raug suav cais raws từng lub chaw khaws ntaub ntawv thiab yuav qeeb ob peb vib nas this, yog li qee qhov request uas dhau threshold tseem yuav tuaj txog origin ua ntej qhov kev nqis tes raug siv (raws li Cloudflare WAF Documentation).
Kev teeb tsa tiag tiag thiab txoj kev kuaj seb lub system puas tiv thaiv DDoS tiag
Txheej txheem siv raws li kev txiav txim
- Txheeb xyuas origin: sau tseg tus IP server, cov chaw nres nkoj qhib, DNS-only record, subdomain tswj hwm thiab email service. Tsis txhob cia cov record ntxiv ua rau IP origin raug nthuav tawm yam tsis txhob txwm.
- Muab lub website hla CDN proxy: qhib proxy tsuas yog rau cov web hostname uas tsim nyog. CDN yuav tsum nyob rau pem hauv ntej origin kom lim request ua ntej lawv kov server.
- Xauv origin: ntawm firewall, cia tsuas yog CDN tus IP nkag tau rau HTTP/HTTPS ports; SSH cia tsuas yog los ntawm IP tus tswj hwm lossis hla VPN. Cloudflare pom zoo tso lawv cov IP rau hauv allowlist ntawm origin thiab kuaj cov DNS record uas tej zaum yuav muaj tus IP qub (raws li Cloudflare Documentation).
- Qhib WAF: pib hauv hom saib xyuas lossis challenge rau cov cai uas muaj kev pheej hmoo thaiv yuam kev, tom qab ntawd hloov mus rau block thaum tau kuaj cov log lawm.
- Teeb rate limit: xub saib xyuas login, search, checkout, upload thiab API; suav raws IP, session, API key lossis account raws li tus qauv tsim.
- Txo lub nra ntawm origin: qhib cache rau CSS, JavaScript, duab thiab cov nplooj ntawv uas cache tau; txhim kho query, object cache thiab txwv PHP worker.
- Npaj txoj kev daws teeb meem: khaws backup, ntaub ntawv tiv tauj tus neeg muab kev pab, ceeb toom threshold thiab txheej txheem hloov mus rau nplooj ntawv static lossis hom kho system.
Yog koj tswj hwm VPS Ubuntu, muab txheej txheem no txuas nrog kev teeb SSL Let’s Encrypt cia li ua tiav kom paub tseeb tias qhov kev txuas CDN–origin raug mã hóa thiab daim ntawv pov thawj yuav tsis tas sijhawm.
Txoj kev kuaj txiaj ntsig yam tsis tsim DDoS rau koj tus kheej
- Kuaj public DNS, DNS keeb kwm thiab certificate transparency kom nrhiav tau IP origin uas raug nthuav tawm.
- Xa qee qhov request raug cai ntawm theem qis mus rau login, search thiab API; xyuas kom meej tias rule sau tseg raug tab sis tsis thaiv cov neeg siv ib txwm.
- Kuaj access log ntawm origin: request ncaj qha los ntawm Internet yuav tsum raug tsis kam lees, hos request los ntawm CDN yuav tsum nkag tau.
- Sib piv cache hit, CPU, RAM, PHP workers, database connections thiab feem pua yuam kev 4xx/5xx ua ntej thiab tom qab qhib CDN.
- Tsis txhob siv cov cuab yeej tsim flood rau lub website tiag yog tsis tau txais ntawv tso cai. Siv ib puag ncig staging lossis kev kuaj load uas tswj tau.
Cov kev ua yuam kev nquag pom thiab txoj kev kho
- Tsuas qhib CDN tabsis tseem tso IP origin tawm: hloov IP origin, kuaj DNS qub thiab xauv kev nkag ncaj qha nrog firewall.
- Tsuas thaiv raws IP: hloov mus suav raws IP ua ke nrog path, session lossis API key vim L7 feem ntau faib qhov chaw los.
- Teeb threshold qis dhau: txheeb xyuas traffic ib txwm ua ntej, siv challenge thaum pib thiab whitelist kom muaj kev tswj hwm.
- Xav tias cache daws tau txhua yam: txheeb xyuas dynamic endpoint, query hnyav thiab request uas cache tsis tau.
- Tsis quav ntsej nqi thiab kev txwv: nyeem kom meej tus neeg muab kev pab txoj cai txog bandwidth, request, blackhole, kev pab thaum muaj teeb meem thiab sijhawm teb.
Xaus: shared hosting haum rau lub website me tabsis koj vam khom tus neeg muab kev pab txoj cai. VPS muab kev tswj hwm thiab yog lub hauv paus zoo rau kev teeb tsa koj tus kheej, tabsis kev tiv thaiv DDoS L7 tsis tsim nyog vam khom tsuas yog firewall hauv lub tshuab. Rau lub website qhib rau pej xeem, txoj kev xaiv uas siv tau tshaj feem ntau yog VPS lossis hosting tso rau tom qab CDN reverse proxy, ua ke nrog cache, WAF, rate limiting thiab xauv origin. Yog daim ntawv thov muaj API, login lossis kev lag luam, xub tsim txoj cai cais raws txhua endpoint es tsis txhob yuav ib pob uas tsuas tshaj tawm dav dav tias “tiv thaiv DDoS”.
Cov ntaub ntawv siv
