Let's Debug

Test result for ciencias.udc.es using http-01

Error
ciencias.udc.es has an A (IPv4) record (193.144.61.116) 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.
Get "http://ciencias.udc.es/.well-known/acme-challenge/letsdebug-test": read tcp 172.104.24.29:56094->193.144.61.116:80: read: connection reset by peer

Trace:
@0ms: Making a request to http://ciencias.udc.es/.well-known/acme-challenge/letsdebug-test (using initial IP 193.144.61.116)
@0ms: Dialing 193.144.61.116
@242ms: Experienced error: read tcp 172.104.24.29:56094->193.144.61.116:80: read: connection reset by peer
A test authorization for ciencias.udc.es to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
193.144.61.116: Fetching http://ciencias.udc.es/.well-known/acme-challenge/OqH_TlHAwXLjcu1nYvbk-HjKcQuwUdE6VIXwUv_SLIQ: Connection reset by peer
Debug
Requests made to the domain
Request to: ciencias.udc.es/193.144.61.116, Result: [Address=193.144.61.116,Address Type=IPv4,Server=,HTTP Status=0], Issue: ANotWorking
Trace:
@0ms: Making a request to http://ciencias.udc.es/.well-known/acme-challenge/letsdebug-test (using initial IP 193.144.61.116)
@0ms: Dialing 193.144.61.116
@242ms: Experienced error: read tcp 172.104.24.29:56094->193.144.61.116:80: read: connection reset by peer

Debug
A and AAAA records found for this domain
ciencias.udc.es. 0 IN A 193.144.61.116
Challenge update failures for ciencias.udc.es in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/2777093174
acme: error code 400 "urn:ietf:params:acme:error:connection": 193.144.61.116: Fetching http://ciencias.udc.es/.well-known/acme-challenge/OqH_TlHAwXLjcu1nYvbk-HjKcQuwUdE6VIXwUv_SLIQ: Connection reset by peer
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for ciencias.udc.es is: es
Debug
8 Certificates contributing to rate limits for this domain

Serial: 395957759814643960257825666153058907545767
NotBefore: 2022-06-06 05:51:47 +0000 UTC
Names: [lbd.udc.es]

Serial: 314618926748477332357019993054253334114526
NotBefore: 2022-06-06 05:51:41 +0000 UTC
Names: [illa.udc.es illa.udc.gal www.illa.udc.es]

Serial: 410538000488876956714084610592389494324264
NotBefore: 2022-06-06 05:51:14 +0000 UTC
Names: [bvg.udc.es]

Serial: 368880765948244681592314652985856456853531
NotBefore: 2022-06-05 15:06:19 +0000 UTC
Names: [data.gtec.udc.es]

Serial: 365311544402996943714793654541085696022778
NotBefore: 2022-06-04 13:22:23 +0000 UTC
Names: [lim.ii.udc.es]

Serial: 415545302788391191216868469050638282979686
NotBefore: 2022-06-04 05:34:56 +0000 UTC
Names: [dpauc.udc.es www.dpauc.udc.es]

Serial: 328562217903890982192484280614169590920268
NotBefore: 2022-06-04 04:09:13 +0000 UTC
Names: [consellosocial.udc.es www.consellosocial.udc.es]

Serial: 386220833845071295711799562275144483473207
NotBefore: 2022-06-03 08:01:33 +0000 UTC
Names: [jitel21.udc.es wgml.es www.imcv.eu www.wgml.es]

Debug
The current status.io status for Let's Encrypt
Operational

Submitted Jun 6 19:12:04 2022. Sat in queue for 3ms. Completed in 8s. Hide verbose information.