air.cs.itu.edu.tr has an A (IPv4) record (160.75.154.23) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
A timeout was experienced while communicating with air.cs.itu.edu.tr/160.75.154.23: Get "http://air.cs.itu.edu.tr/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://air.cs.itu.edu.tr/.well-known/acme-challenge/letsdebug-test (using initial IP 160.75.154.23)
@0ms: Dialing 160.75.154.23
@10001ms: Experienced error: context deadline exceeded
A test authorization for air.cs.itu.edu.tr to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
160.75.154.23: Fetching http://air.cs.itu.edu.tr/.well-known/acme-challenge/8zmgpsoFUBIq43XhYI7A9eYbBtjWdXTiUoFZJmOdYVw: Timeout after connect (your server may be slow or overloaded)
air.cs.itu.edu.tr is currently affected by Let's Encrypt-based rate limits (https://letsencrypt.org/docs/rate-limits/). You may review certificates that have already been issued by visiting https://crt.sh/?q=%itu.edu.tr . Please note that it is not possible to ask for a rate limit to be manually cleared.
The 'Certificates per Registered Domain' limit (50 certificates per week that share the same Registered Domain: itu.edu.tr) has been exceeded. There is no way to work around this rate limit. The next non-renewal certificate for this Registered Domain should be issuable after 2022-08-05 02:05:11 +0000 UTC (16h20m0s from now).
CAA records control authorization for certificate authorities to issue certificates for a domain
itu.edu.tr. 0 IN CAA 0 issue "digicert.com"
itu.edu.tr. 0 IN CAA 0 issue "letsencrypt.org"
itu.edu.tr. 0 IN CAA 0 issuewild "digicert.com"
Requests made to the domain
Request to: air.cs.itu.edu.tr/160.75.154.23, Result: [Address=160.75.154.23,Address Type=IPv4,Server=,HTTP Status=0], Issue: ANotWorking
Trace:
@0ms: Making a request to http://air.cs.itu.edu.tr/.well-known/acme-challenge/letsdebug-test (using initial IP 160.75.154.23)
@0ms: Dialing 160.75.154.23
@10001ms: Experienced error: context deadline exceeded
A and AAAA records found for this domain
air.cs.itu.edu.tr. 0 IN A 160.75.154.23
Challenge update failures for air.cs.itu.edu.tr in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/3497592324
acme: error code 400 "urn:ietf:params:acme:error:connection": 160.75.154.23: Fetching http://air.cs.itu.edu.tr/.well-known/acme-challenge/8zmgpsoFUBIq43XhYI7A9eYbBtjWdXTiUoFZJmOdYVw: Timeout after connect (your server may be slow or overloaded)
The IANA public suffix is the TLD of the Registered Domain
The TLD for air.cs.itu.edu.tr is: edu.tr
53 Certificates contributing to rate limits for this domain
Serial: 355861882992526272178365353594595932583849
NotBefore: 2022-08-04 02:24:08 +0000 UTC
Names: [demo.ayva.itu.edu.tr]
Serial: 292146783442774063912703344831597295820357
NotBefore: 2022-08-04 02:18:07 +0000 UTC
Names: [nanosemlab.itu.edu.tr]
Serial: 427537134816732266344087393452616032165463
NotBefore: 2022-08-04 02:14:11 +0000 UTC
Names: [catoflow.itu.edu.tr www.catoflow.itu.edu.tr]
Serial: 278737540837591731160594798935222118131151
NotBefore: 2022-08-04 02:09:07 +0000 UTC
Names: [www.fsi.itu.edu.tr]
Serial: 320802063933398265714369701040641491480096
NotBefore: 2022-08-04 02:08:07 +0000 UTC
Names: [www.yesilkampus.itu.edu.tr]
Serial: 412384374590302615589675628818459888306380
NotBefore: 2022-08-03 19:38:37 +0000 UTC
Names: [abis-files.itu.edu.tr]
Serial: 264592420854369471583209630496626996140890
NotBefore: 2022-08-03 06:44:43 +0000 UTC
Names: [itutekstilkongre.itu.edu.tr www.itutekstilkongre.itu.edu.tr]
Serial: 302801762954529156602011121061847082378530
NotBefore: 2022-08-02 02:17:10 +0000 UTC
Names: [boss.pprd.itu.edu.tr www.boss.pprd.itu.edu.tr]
Serial: 402319195715188204440966202980659889127114
NotBefore: 2022-08-01 05:03:22 +0000 UTC
Names: [portal.uhem.itu.edu.tr]
Serial: 287949704767710901059118330177720006573087
NotBefore: 2022-08-01 02:21:07 +0000 UTC
Names: [legolas.cc.itu.edu.tr]
Serial: 353486140558454953869785341830301164700544
NotBefore: 2022-08-01 02:20:07 +0000 UTC
Names: [ayva.itu.edu.tr]
Serial: 347291004883027195059784104469027083652992
NotBefore: 2022-08-01 02:08:08 +0000 UTC
Names: [www.akut.itu.edu.tr]
Serial: 342675109782617777265022275641655268204218
NotBefore: 2022-08-01 02:06:07 +0000 UTC
Names: [sss.sis.itu.edu.tr]
Serial: 309632019017717667121555788891178198346369
NotBefore: 2022-07-31 02:21:06 +0000 UTC
Names: [s.ila.itu.edu.tr]
Serial: 267848965073918273800976610215684976837787
NotBefore: 2022-07-31 02:20:06 +0000 UTC
Names: [sgit.cc.itu.edu.tr]
Serial: 427355099641544072158786919264134907114729
NotBefore: 2022-07-31 02:12:08 +0000 UTC
Names: [ituaiclub.itu.edu.tr]
Serial: 379729262753567168658975913705351258947359
NotBefore: 2022-07-31 02:06:09 +0000 UTC
Names: [global.itu.edu.tr www.global.itu.edu.tr]
Serial: 328095741110894059512906476885462102755702
NotBefore: 2022-07-30 02:29:11 +0000 UTC
Names: [portal.pprd.itu.edu.tr www.portal.pprd.itu.edu.tr]
Serial: 429207221176070416003811602370062633301956
NotBefore: 2022-07-30 02:27:11 +0000 UTC
Names: [komando.cc.itu.edu.tr www.komando.cc.itu.edu.tr]
Serial: 275778625480591961759016302309555729215110
NotBefore: 2022-07-30 02:20:11 +0000 UTC
Names: [omp.ituyayinevi.itu.edu.tr www.omp.ituyayinevi.itu.edu.tr]
Serial: 336046128783130573212772414738433191536072
NotBefore: 2022-07-30 02:14:07 +0000 UTC
Names: [www.kita.itu.edu.tr]
Serial: 407733897440712525264386162788182160460486
NotBefore: 2022-07-30 02:13:07 +0000 UTC
Names: [www.kalite.itu.edu.tr]
Serial: 274421412891014771448419484596545347287321
NotBefore: 2022-07-30 02:12:06 +0000 UTC
Names: [www.its.itu.edu.tr]
Serial: 379171251305405203163325865654271371734136
NotBefore: 2022-07-30 02:11:07 +0000 UTC
Names: [www.islmuh.itu.edu.tr]
Serial: 357957433930324495663933942039047029489333
NotBefore: 2022-07-30 02:10:07 +0000 UTC
Names: [www.isgb.itu.edu.tr]
Serial: 284868756676760597304088986988621528821636
NotBefore: 2022-07-30 02:09:06 +0000 UTC
Names: [www.imid.itu.edu.tr]
Serial: 400912385631214089183451489882168580904169
NotBefore: 2022-07-30 02:08:07 +0000 UTC
Names: [www.gma.itu.edu.tr]
Serial: 340656572633274443372359276171317359862658
NotBefore: 2022-07-30 02:06:10 +0000 UTC
Names: [www.sss.sis.itu.edu.tr]
Serial: 415268698066928258152924954930436553220435
NotBefore: 2022-07-30 02:04:08 +0000 UTC
Names: [www.ardek.itu.edu.tr]
Serial: 345144136658058661226046688413102775622627
NotBefore: 2022-07-29 02:28:08 +0000 UTC
Names: [www.mcdm2019.itu.edu.tr]
Serial: 300067578077519852284637488415899849860125
NotBefore: 2022-07-29 02:27:07 +0000 UTC
Names: [www.marcolab.itu.edu.tr]
Serial: 324999905509611349967359075798709335892025
NotBefore: 2022-07-29 02:26:06 +0000 UTC
Names: [www.madenmk.itu.edu.tr]
Serial: 381473166767214828186185851065252226517201
NotBefore: 2022-07-29 02:25:08 +0000 UTC
Names: [www.logistics.itu.edu.tr]
Serial: 359071037580041956523045462939446570734044
NotBefore: 2022-07-29 02:24:07 +0000 UTC
Names: [www.kutuphane.itu.edu.tr]
Serial: 300430338760188653336016280338190652236405
NotBefore: 2022-07-29 02:23:08 +0000 UTC
Names: [www.kuluplerbirligi.itu.edu.tr]
Serial: 418868051198711752313961417345161836478505
NotBefore: 2022-07-29 02:22:08 +0000 UTC
Names: [www.kozmo-lab.itu.edu.tr]
Serial: 348470932145633940292011513774329086331073
NotBefore: 2022-07-29 02:21:07 +0000 UTC
Names: [www.kaem.itu.edu.tr]
Serial: 305120621531623865790841763276219317964130
NotBefore: 2022-07-29 02:20:10 +0000 UTC
Names: [www.itumtal.itu.edu.tr]
Serial: 325260448940662156626626799254776048462429
NotBefore: 2022-07-29 02:19:07 +0000 UTC
Names: [www.itudfsem.itu.edu.tr]
Serial: 361318609186205266417735816940359779959723
NotBefore: 2022-07-29 02:18:07 +0000 UTC
Names: [www.ipd.itu.edu.tr]
Serial: 336456647086182421975679717353124112469628
NotBefore: 2022-07-29 02:17:08 +0000 UTC
Names: [www.international.itu.edu.tr]
Serial: 384867615158827703255335877350290671175103
NotBefore: 2022-07-29 02:16:08 +0000 UTC
Names: [www.innovative-wwtech.itu.edu.tr]
Serial: 340857512117433067574758540368982275769445
NotBefore: 2022-07-29 02:15:06 +0000 UTC
Names: [www.innovationorbit1.itu.edu.tr]
Serial: 391236913873563185025617123827361979822809
NotBefore: 2022-07-29 02:14:08 +0000 UTC
Names: [www.igats.df.itu.edu.tr]
Serial: 362134049127956739303614840134165450372500
NotBefore: 2022-07-29 02:13:07 +0000 UTC
Names: [www.iaeste.itu.edu.tr]
Serial: 431860202982770559750410168126110654793748
NotBefore: 2022-07-29 02:12:08 +0000 UTC
Names: [www.hst.itu.edu.tr]
Serial: 419915147732877438054211787624439231050322
NotBefore: 2022-07-29 02:11:08 +0000 UTC
Names: [www.hbm.itu.edu.tr]
Serial: 419279908495817593149033407788045550573653
NotBefore: 2022-07-29 02:10:06 +0000 UTC
Names: [www.hazturk.itu.edu.tr]
Serial: 303679149818478105862790964160867991279628
NotBefore: 2022-07-29 02:09:08 +0000 UTC
Names: [www.gurlab.itu.edu.tr]
Serial: 410719425900060879833625629896637934364349
NotBefore: 2022-07-29 02:08:07 +0000 UTC
Names: [www.gsb.itu.edu.tr]
Serial: 278419013199491175445945502079089465596902
NotBefore: 2022-07-29 02:07:06 +0000 UTC
Names: [www.ginova.itu.edu.tr]
Serial: 389158488765808691025063161799833926549236
NotBefore: 2022-07-29 02:06:08 +0000 UTC
Names: [www.ggp.itu.edu.tr]
Serial: 383495359255300528806139275503080003894340
NotBefore: 2022-07-29 02:05:11 +0000 UTC
Names: [www.geoteknik.itu.edu.tr]
The current status.io status for Let's Encrypt
Operational