🥇Ua li cas peb tsoo lub Tuam Txhab Tuam Txhab Tuam Txhab (part 1)

Nyob zoo txhua leej txhua tus!

Nikita yog nyob rau hauv kov - ib tug system engineer los ntawm lub tuam txhab SEMrush. Hnub no kuv yuav qhia koj txog yuav ua li cas peb tau ntsib txoj haujlwm ntawm kev ua kom ruaj khov ntawm peb cov kev pabcuam semrush.com hauv Suav teb, thiab cov teeb meem dab tsi uas peb tau ntsib thaum nws siv (muab qhov chaw ntawm peb cov ntaub ntawv chaw nyob rau sab hnub tuaj ntawm Tebchaws Meskas).

Qhov no yuav yog ib zaj dab neeg loj, muab faib ua ob peb kab lus. Kuv yuav qhia koj tias txhua yam tshwm sim rau peb li cas: los ntawm kev pabcuam tsis ua haujlwm los ntawm Tuam Tshoj, mus rau qhov ntsuas kev ua haujlwm ntawm cov kev pabcuam hauv qib ntawm nws cov qauv Asmeskas rau Asmeskas. Kuv cog lus tias nws yuav nthuav thiab muaj txiaj ntsig. Yog li, cia peb mus.

Teeb meem ntawm Suav Internet

Txawm tias tus neeg nyob deb tshaj plaws los ntawm qhov tshwj xeeb ntawm kev tswj hwm network tau hnov txog Great Firewall ntawm Tuam Tshoj. Wow, suab zoo, txoj cai? Tab sis nws yog dab tsi thiab nws ua haujlwm li cas yog cov lus nug nyuaj heev. Koj tuaj yeem nrhiav tau ntau cov ntawv hauv Is Taws Nem mob siab rau qhov no, tab sis los ntawm kev pom zoo, cov qauv ntawm qhov firewall no tsis tau piav qhia nyob qhov twg. Qhov twg, txawm li cas los xij, tsis xav tsis thoob. Kuv yuav lees tam sim ntawd raws li cov txiaj ntsig ntawm kev ua haujlwm ib xyoos, kuv yuav tsis tuaj yeem hais meej tias nws ua haujlwm li cas, tab sis kuv tuaj yeem qhia koj txog kuv cov lus pom thiab cov lus pom zoo. Thiab peb mam li pib nrog cov lus xaiv txog qhov firewall no.

Muaj ntau cov lus xaiv txog qhov firewall no heev. Cia peb sau cov ntsiab lus tseem ceeb thiab nthuav tshaj ntawm lawv rau hauv ib daim ntawv teev npe:

Google, Facebook, Twitter thiab lwm yam kev pabcuam zoo sib xws raug thaiv thiab tsis ua haujlwm hauv Suav teb.
Txhua lub tsheb mus rau sab nraud ntawm Tuam Tshoj thiab INTO Tuam Tshoj tau txheeb xyuas thiab txwv tsis pub siv tshuab kev kawm (thaum muaj kev txwv tsis pub muaj tsheb khiav), uas ua rau nws qeeb heev (tsheb thauj mus los) hla ciam teb.
Suav cov koom haum txawj ntse yuav hack ib qho kev nkag mus nkag los ntawm lawv lub firewall.
VPN tunnels, IPSEC tunnels tsis ruaj khov, sib tsoo thiab raug thaiv tas li.
Qhov yooj yim dua qhov encryption, qhov yooj yim dua cov kab lus dhau los siv los txheeb xyuas qhov tseeb / encrypt tsheb, nws nrawm dua los ntawm Suav firewall.

Nov yog yam peb paub txog cov lus xaiv no:

Google, Facebook, Twitter thiab lwm yam kev pabcuam zoo sib xws yog qhov tseeb thaiv (koj KO), tab sis ntau qhov kev tshaj lij Google, piv txwv li, tsis txwv thiab ua haujlwm (ib yam gstatic.com). Cov lus xaus raws li qhov no: koj yuav tsum tsis txhob txiav tawm tag nrho Google thiab lwm yam kev pabcuam uas zoo li raug thaiv.
Txhua lub tsheb hla ciam teb tiag tiag ntxiv qeeb qeeb rau nws lub sijhawm. Saib ntawm ob qhov txiaj ntsig. Ib qhov chaw, ib nplooj ntawv, yooj yim GET curl'om. Thawj qhov ntsuas yog los ntawm Tuam Tshoj nws tus kheej (lub nroog zoo nkauj ntawm Shenzhen). Qhov thib ob yog ntsuas los ntawm sab nraud los ntawm Hong Kong (nws muaj kev tswj hwm, thiab tsis muaj hluav taws kub ntawm nws thiab lub ntiaj teb). Qhov kev ncua deb ntawm lub nroog nyob rau hauv ib txoj kab ncaj nraim yog kwv yees li 30-40 km.

nikita@china-shenzhen:~# curl -o /dev/null -w@curl_time "https://www.semrush.com/info/ebay.com"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  381k    0  381k    0     0  71824      0 --:--:--  0:00:05 --:--:-- 82832
time_namelookup:  0.004500
time_connect:  0.169342
time_appconnect:  0.723189
time_pretransfer:  0.723499
time_redirect:  0.000000
time_starttransfer:  1.532912
----------
time_total:  5.443407
----------
size_download:  390968 Bytes
speed_download:  71824.000B/s

nikita@china-hongkong:~# curl -o /dev/null -w@curl_time "https://www.semrush.com/info/ebay.com"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  319k    0  319k    0     0  2555k      0 --:--:-- --:--:-- --:--:-- 2573k
time_namelookup:  0.029366
time_connect:  0.030742
time_appconnect:  0.047310
time_pretransfer:  0.047388
time_redirect:  0.000000
time_starttransfer:  0.120793
----------
time_total:  0.124871
----------
size_download:  326755 Bytes
speed_download:  2616740.000B/s

Xyuam xim rau time_connect. Thiab feem ntau, koj pom qhov tshwm sim: firewall ntxiv 4 vib nas this ntxiv, uas yog monstrously ntev.

VPN thiab IPSEC tunnels ua tsis tau ntau zaus. Kuv yuav tham txog qhov no me ntsis tom qab thiab nthuav dav ntxiv. VPN servers uas siv los ntawm cov neeg siv raug thaiv lub sijhawm (feem ntau hauv ib hnub tom qab pib siv).
Muaj ib lub tswv yim tau txais los ntawm cov neeg nyob hauv Suav teb tias qhov yooj yim ntawm kev nkag mus rau kev nkag mus, nws hla ciam teb sai dua, vim nws yooj yim to taub tias tsis muaj dab tsi txhaum cai txog nws. Thiab nyob rau hauv tib txoj kev, "huv" tsheb tau txais ntau bandwidth thiab ceev ntawm txoj kev, thaum "dub" tsheb, uas tsis muaj dab tsi yuav to taub, tau txais, ntawm qhov tsis tooj, ib tug qeeb txoj kev. Piv txwv li kuv mam li siv curl rau ifconfig.co ntawm HTTPS thiab HTTP raws tu qauv.

curl -o /dev/null -w@curl_time "https://ifconfig.co/"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    13  100    13    0     0      2      0  0:00:06  0:00:05  0:00:01     3
time_namelookup:  0.004305
time_connect:  0.397465
time_appconnect:  5.149305
time_pretransfer:  5.149393
time_redirect:  0.000000
time_starttransfer:  5.568847
----------
time_total:  5.568893
----------
size_download:  13 Bytes
speed_download:  2.000B/s

curl -o /dev/null -w@curl_time "http://ifconfig.co/"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    13  100    13    0     0     28      0 --:--:-- --:--:-- --:--:--    28
time_namelookup:  0.004282
time_connect:  0.212457
time_appconnect:  0.000000
time_pretransfer:  0.212484
time_redirect:  0.000000
time_starttransfer:  0.450565
----------
time_total:  0.450620
----------
size_download:  13 Bytes
speed_download:  28.000B/s

Qhov sib txawv ntawm 5 vib nas this rau tag nrho lub sijhawm rub tawm ntawm 13 bytes. Ntxiv mus, thaum ua qhov kev sim no ntau zaus, koj tuaj yeem pom tias GET ntawm HTTP tau ua tiav feem ntau tib lub sijhawm txhua lub sijhawm, thaum ntawm HTTPS lub vev xaib qee zaum teb hauv 3, 5, 10 thiab 17 vib nas this. Qee zaum SSL yuam kev tshwm sim:

Unknown SSL protocol error in connection to ifconfig.co:443.

Yog li peb muaj:

Cov teeb meem tsim los ntawm Suav firewall tau piav qhia saum toj no.
Pings rau sab nraud cov peev txheej thiab hauv qhov tunnels ib ntus ploj mus.
Latency ntawm ob lub ntsiab lus hloov pauv tas li, thiab feem ntau nws tsuas yog tsis tuaj yeem xav txog. Thaum sib txuas cov nroog / cheeb tsam sib txawv, koj xav tias, raws li qhov chaw nyob ntawm thaj chaw, kev ncua yuav tsawg dua, tab sis koj tau txais qhov xwm txheej zoo sib xws.
Internet thiab kev sib txuas lus yog ceev los yog qeeb. Muaj kev vam khom me ntsis ntawm lub sijhawm nruab hnub thiab hnub ntawm lub lim tiam, tab sis tsis tas li.
DNS thov rau lub ntiaj teb sab nraud los ntawm Tuam Tshoj qee zaum dhau lub sijhawm tso cai.

Daim duab uas tshwm sim tsuas yog "zoo heev."

Cov ntaub ntawv chaw, raws li kuv twb tau hais lawm, yog nyob rau sab hnub tuaj Tebchaws Meskas, thiab tag nrho SEMrush muaj ntau ntau cov khoom sib cuam tshuam, backends, frontends, databases, thiab tag nrho cov no hauv DC thiab huab. Peb, raws li ib pab pawg neeg tswj hwm, tau muab txoj haujlwm sai sai pib ua haujlwm hauv Suav teb nrog kev siv zog me ntsis.

Peb yuav tsum teb cov lus nug tseem ceeb: nws puas tuaj yeem tau txais los ntawm kev siv nyiaj tsawg thiab daws txhua yam teeb meem cuam tshuam nrog Suav Is Taws Nem thiab firewall ntawm lub network / huab / server theem?

Peb pib los ntawm kev txais ICP- daim ntawv tso cai.

ICP daim ntawv tso cai

Txhawm rau kom muaj peev xwm tuav koj cov kev pabcuam hauv Suav teb (Mainland China) thiab ua cov kev xeem, koj yuav tsum xub tau txais daim ntawv tso cai ICP rau lub npe.

Yog tias koj lub vev xaib cov neeg siv tsheb raug txiav tawm hauv Mainland Tuam Tshoj, thiab yog tias koj lub vev xaib tsis muaj daim ntawv tso cai ICP, koj cov tsheb yuav raug thaiv ntawm ISP / hosting sab. Qhov zoo siab, daim ntawv tso cai ICP suav nrog tus kws kho mob tshwj xeeb, xws li Cloudflare lossis Alibaba Cloud. Yog li ntawd, yog tias koj tau txais daim ntawv tso cai ICP rau Cloudflare thiab tuav koj lub vev xaib nrog lawv, koj yuav tsis tuaj yeem "txuag" mus rau Alibaba Cloud. Koj yuav tau ntxiv lwm hosting rau daim ntawv tso cai no.

Tau txais daim ntawv tso cai ICP rau lub npe, peb tuaj yeem tuaj nrog thiab siv cov tswv yim tshwj xeeb thiab cov kev daws teeb meem.

Kev ntsuam xyuas kev daws teeb meem

Tab sis ua ntej koj ncaj qha tsim cov kev xaiv staging, tig lub pob qhov rooj, txhim kho lub vev xaib kev ua tau zoo thiab nws qhov nrawm, koj yuav tsum xaiv lub cuab yeej rau kev sim nws txhawm rau pom qhov twg ntawm peb qhov kev ua tau zoo dua lossis, ntawm qhov tsis sib xws, ua rau lub xaib ua haujlwm tsis zoo.

Peb cov cuab yeej xeem yuav tsum tau ua kom tau raws li ob lub ntsiab lus tseem ceeb:

nws yuav tsum muaj peev xwm khiav kev xeem los ntawm Tuam Tshoj,
nws yuav tsum muaj kev sim browser.

Yog li peb pom Neeg ntes! Lawv muaj kev pov hwm zoo ntawm qhov chaw sim thoob ntiaj teb. Hauv Suav teb, kev sim kuj tseem tuaj yeem khiav los ntawm 100500 lub xeev los ntawm cov cuab yeej no. Txhua tus muaj ntau tus neeg muab kev pabcuam sib txawv + muaj peev xwm ua tau Tshaj pob-tests (ib yam dab tsi zoo li lub tshuab virtual hauv cov ntaub ntawv chaw) thiab Lastmile-tests (zoo li ze li sai tau rau cov neeg siv khoom, aka workstation). Hom kev xeem tom kawg yog kim dua.

Tom qab ua tiav daim ntawv cog lus txhua xyoo (tsawg dua qhov ua tsis tau), peb pib kawm txog qhov ntsuas. Frankly, peb tau zoo siab xav tsis thoob los ntawm nws txoj haujlwm. Koj tuaj yeem khiav:

DNS xeem,
Kev ntsuam xyuas lub vev xaib (kev sim browser, yooj yim GET / POST, mobile neeg siv khoom emulation, thiab lwm yam),
Kev txheeb xyuas kev lag luam (piv txwv li, nkag mus),
API xeem,
Ping, traceroute, NTP, thiab lwm yam.

Koj tsis tuaj yeem sau txhua yam. Thiab qhov tseem ceeb tshaj plaws, txhua qhov kev ntsuam xyuas tuaj yeem kho tau zoo heev los ntawm kev ntxiv ib pawg ntawm cov headers thiab lwm yam tsis. Cov zis yog cov ntaub ntawv ntau heev uas piav qhia txog koj qhov kev xeem. Yog tias peb tham txog qhov nthuav dav tshaj plaws rau peb (kev sim browser), cov txiaj ntsig suav nrog:

Txuas, Tos, Load, SSL, DNS sijhawm,
TTFB, TTLB, Cov ntaub ntawv tiav, Render sijhawm, DOM load,
Teb (qee yam nyob ze rau Sijhawm Rau Thawj Byte), Webpage Teb (ib yam ze rau Lub Sijhawm Rau Kawg Byte),
Txhua feem pua, nruab nrab, nruab nrab lub sijhawm
Lwm yam

Raws li, tag nrho cov kev ntsuas no yog qhov zoo rau pom kev hloov pauv thiab nkag siab seb yam twg tau zoo dua. Peb feem ntau saib Teb, Webpage Response, Median, 75 thiab 95 Percentiles.

Ib lo lus nug tseem ceeb uas nyob hauv huab cua txij thaum pib: Koj puas tuaj yeem ntseeg Catchpoint?? Puas yog lub cuab yeej no cuam tshuam txog qhov chaw thauj khoom ceev hauv Suav teb los ntawm ntau lub nroog, lossis puas yog qee qhov kev sim hauv lub tshuab nqus tsev uas tsis muaj dab tsi ua rau cov neeg siv kev paub tiag tiag?
Qhov no yog ib qho teeb meem loj, vim hais tias nyob rau hauv Russia nws yog yuav luag tsis yooj yim sua kom ntseeg tau tias yuav ua li cas lub site los ntawm Tuam Tshoj ua hauj lwm. Los ntawm kev ua cov thom khwm-tshem tawm los ntawm lub tshuab virtual, qhov kawg tshwm sim yog tias qhov chaw thauj khoom tsis pub dhau ob peb feeb, uas yooj yim tsis tuaj yeem lees txais rau kev sim, yog li qhov kev xaiv nkaus xwb rau kev ntsuas phau ntawv yog curl thiab yooj yim tau txais los ntawm lub console nrog timer. . Qhov no pab tau vim qhov kev sim no zoo qhia txog kev ceev ntawm kev daws teeb meem network, thiab yog tias tseem muaj kev sim browser, ces nws zoo heev.

Tom qab ntawd peb tus kheej mus rau Tuam Tshoj thiab ntseeg tau tias Koj tuaj yeem tso siab rau Catchpoint; nws zoo heev qhia txog kev ua tau zoo tiag tiag.

Cloudflare Tuam Tshoj Network

Txij li thaum peb ua tiav siv Cloudflare rau lub ntsiab lus tseem ceeb semrush.com, peb txiav txim siab tam sim sim lawv cov yam ntxwv hu ua Tuam Tshoj Network. Qhov kev xaiv no tsuas yog qhib rau cov chaw lag luam raws li kev thov cais thiab rau tus nqi ntxiv. Nws tsuas yog muaj rau cov chaw uas muaj daim ntawv tso cai ICP tsim nyog uas teev Cloudflare ua tus muab kev pabcuam. Tom qab ua kom nws, "Suav CDN" los ntawm Cloudflare yuav muaj nyob rau ntawm qhov chaw - kev khiav tsheb los ntawm Suav thaj av thaj av ntawm qhov ze tshaj plaws PoP (Points of Presence) CF, thiab tom qab ntawd los ntawm nws cov tes hauj lwm lossis cov tes hauj lwm ntawm cov chaw muab kev pab / cov koom tes nws raug xa mus rau keeb kwm. .

Daim duab ntawm lub rooj zaum sim no tau nthuav tawm hauv qab no.

Qhov no yog ib qho kev xaiv zoo rau peb. Nws hloov tawm tias qhov thib ob tseem yuav yog rau CF, uas tsis ntxiv rau cov kev daws teeb meem siv hauv lub tuam txhab, thiab tseem xyaum tsis ua rau cov teeb meem nyuaj.

Peb khiav qhov kev sim browser thiab qhov no yog qhov tshwm sim:

Pob zeb diamond liab yog qhov kev sim ua tsis tiav. Cov ntaub ntawv hauv qab no yog DNS yuam kev ( daws teeb meem sijhawm). Cov kev ua tsis tiav nyob rau saum toj yog lub sijhawm.

Lub sijhawm ua haujlwm: 86.6
Median: 18 s
75 ib: 29.3s
95 ib: 60s

Nruab nrab, tom qab thauj khoom raug tshem tawm rovCaptcha (Google kev pabcuam thaiv hauv Suav teb) txo qis los ntawm 28 mus rau 18 vib nas this. Tab sis cov no tseem yog cov txiaj ntsig txaus ntshai, xav tias tib qhov kev sim rau semrush.com (los ntawm Asmeskas) tau muab tsawg dua 10 vib nas this rau 95% ntawm cov neeg siv (los ntawm Teb Chaws Asmeskas) ntawm tib nplooj ntawv (zoo li qub + dynamic).

Koj tuaj yeem nkag mus rau hauv txhua qhov kev xeem thiab saib Dej tsaws tsag thiab lwm cov ncauj lus kom ntxaws ntxiv. Peb tau pib tshawb xyuas cov laj thawj ntawm qhov ua yuam kev, thiab yog tias lub sijhawm ua haujlwm txhua yam yog ntau dua lossis tsawg dua: Internet hauv Suav teb "txav mus rau hauv thiab tawm", vim qhov no qhov ceev ntawm kev sib txuas thiab kev thauj khoom ntawm cov peev txheej los ntawm txawv teb chaws tsis ruaj khov thiab tsis sib xws, ces qhov yuam kev DNS ua rau peb xav tsis thoob. Peb pom qhov ntawd Po Cloudflare tiag tiag nyob hauv Suav teb, qhov chaw nyob ntawm qhov chaw daws teeb meem rau ib qho twg IP, tab sis cov DNS servers yog neeg Asmeskas, uas yog vim li cas DNS thov raug yuam kom hla ciam teb, yog li qee zaum lawv ua tsis tiav.

Tom qab qhia meej cov lus nug no nrog CF, nws tau muab qhov ntawd Lawv tsis muaj lawv tus kheej DNS servers hauv Suav teb, thiab thaum twg nws yuav yog tseem tsis paub.

Yog li ntawd, peb txiav txim siab los sim tsuas yog Cloudflare DNS thiab hloov Cloudflare kev khiav hauj lwm mechanism rau peb qhov chaw mus rau "DNS nkaus xwb" Qhov no yog ib hom thaum Cloudflare tsis tso cai khiav tsheb los ntawm nws tus kheej, uas txhais tau hais tias nws tsis muab kev tiv thaiv DDoS, CDN thiab lwm yam nta, thiab ua haujlwm hauv hom DNS server tsis tu ncua.

Qhov no sawv ntsug yog qhia schematically hauv daim duab hauv qab no. Daim duab coj mus rau hauv tus account qhov kev paub tshiab uas Cloudflare's DNS servers nyob tom qab firewall.

Ntawm Catchpoint peb tau khiav yooj yim GET xeem (tsis yog browser kuaj), uas tau pom ntau qhov ua tsis tiav. Lawv tau tshwm sim los ntawm tib yam DNS yuam kev.

Peb pib debugging cov yuam kev no siv khawb thiab pom tias raws li thawj qhov kev thov qhov chaw nyob tau txiav txim kom raug, thiab raws li kev thov rov qab peb tau txais txhua zaus SERVFAIL и tsis pom. Vim li cas qhov no tshwm sim tam sim ntawd?

root@iZwz97n2wgbp61qucbfrjsZ:~# host semrushchina.cn
semrushchina.cn has address 220.170.186.192
Host semrushchina.cn not found: 2(SERVFAIL)
root@iZwz97n2wgbp61qucbfrjsZ:~# host semrushchina.cn
semrushchina.cn has address 220.170.186.192
Host semrushchina.cn not found: 2(SERVFAIL)
root@iZwz97n2wgbp61qucbfrjsZ:~# host semrushchina.cn
semrushchina.cn has address 220.170.186.192
Host semrushchina.cn not found: 2(SERVFAIL)
root@iZwz97n2wgbp61qucbfrjsZ:~# host semrushchina.cn
semrushchina.cn has address 220.170.186.192
Host semrushchina.cn not found: 2(SERVFAIL)

Tsis muaj qhov yuam kev li no thaum nug Cloudflare NS servers ncaj qha:

root@iZwz97n2wgbp61qucbfrjsZ:~# for i in `seq 1 2`; do host semrushchina.cn ray.ns.cloudflare.com.; done
Using domain server:
Name: ray.ns.cloudflare.com.
Address: 173.245.59.138#53
Aliases: 

semrushchina.cn has address 220.170.186.192
semrushchina.cn has address 220.170.186.192
Using domain server:
Name: ray.ns.cloudflare.com.
Address: 173.245.59.138#53
Aliases: 

semrushchina.cn has address 220.170.186.192
semrushchina.cn has address 220.170.186.192

Qhov no txhais tau hais tias qhov teeb meem yog nyob rau sab ntawm "hauv zos" DNS server lossis tus neeg muab kev pabcuam server.
Kev tshawb nrhiav ntxiv tau qhia tias SERVFAIL peb daws tau AAAA-cov ntaub ntawv.

Nws muab tawm tias thaum thov los ntawm Cloudflare UAA-record uas tsis muaj nyob hauv lub npe, Cloudflare teb А-Qhov kev nkag uas yog qhov yuam kev thiab tsis ua raws li RFC. Vim li cas tus neeg daws teeb meem hauv zos (xxxx) Kuv tsis nyiam nws, thiab nws teb SERVFAIL. Qhov kev coj cwj pwm no tau pom meej meej hauv lub cav hauv qab no:

root@iZwz97n2wgbp61qucbfrjsZ:~# dig -t AAAA semrushchina.cn @x.x.x.x

; <<>> DiG 9.10.3-P4-Ubuntu <<>> -t AAAA semrushchina.cn @x.x.x.x
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 55467
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;semrushchina.cn.               IN      AAAA

;; Query time: 334 msec
;; SERVER: x.x.x.x#53(x.x.x.x)
;; WHEN: Tue Aug 14 23:38:50 CST 2018
;; MSG SIZE  rcvd: 44

root@iZwz97n2wgbp61qucbfrjsZ:~# dig -t AAAA semrushchina.cn @dana.ns.cloudflare.com.

; <<>> DiG 9.10.3-P4-Ubuntu <<>> -t AAAA semrushchina.cn @dana.ns.cloudflare.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63944
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;semrushchina.cn.               IN      AAAA

;; ANSWER SECTION:
semrushchina.cn.        300     IN      A       220.170.186.192

;; Query time: 185 msec
;; SERVER: 173.245.58.105#53(173.245.58.105)
;; WHEN: Tue Aug 14 23:43:03 CST 2018
;; MSG SIZE  rcvd: 60

Peb tau xa daim ntawv qhia txog kab mob rau Cloudflare, thiab lawv tau kho nws tom qab qee lub sijhawm. Nws hloov tawm los ua qhov nthuav: tam sim no tseem tsis muaj kev txhawb nqa IPv6 hauv Suav teb, yog li Cloudflare tsis tuaj yeem muab nws qhov chaw nyob IPv6 nyob rau hauv teb rau qhov kev thov. UAA-cov ntaub ntawv. Thaum kawg, txhua yam tau raug daws raws li qhov uas Cloudflare pib teb rau Tuam Tshoj NODATA rau tej kev thov ntawd.

Yog li, DNS yuam kev hauv Catchpoint tests poob qis, tab sis tsis tag. Lub sijhawm tseem nyob ntawm no:

Thiab peb pib nrhiav lwm txoj kev daws teeb meem.

Hauv ntu tom ntej no kuv yuav qhia koj tias peb tau sim huab cua Suav li cas Alibaba huab, yuav ua li cas, nrog kev pab los ntawm me ntsis "magic" ntawm Nginx, peb muaj peev xwm sai sai tsim PoC (Proof of Concept) kev daws teeb meem, yuav ua li cas peb tsim Multi-Cloud kev daws teeb meem, ib qho ntawm qhov kawg tau pab txhawb kev ua haujlwm ntawm kev pabcuam. los ntawm Tuam Tshoj.

Nyob zoo!