webdisk.ctequebec.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7a:f0:65:e0:00:3b:5e:5f:6e:cc:f3:c6:84:66:e3:95:dd was issued on by Let's Encrypt.

With 9 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=webdisk.ctequebec.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:7a:f0:65:e0:00:3b:5e:5f:6e:cc:f3:c6:84:66:e3:95:dd
Serial Number (int): 303170850243884449232740200073851102795229
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 9f:a1:ec:4c:d5:16:26:ca:8b:7a:b1:28:bb:81:1c:87:ca:dc:79:4c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e7:57:ff:51:bd:18:4f:0f:e9:ba:10:ea:fe:98:6f:1d:a2:19:60:bf
Fingerprint (sha256): 8a:77:d1:fa:9a:99:9e:a7:10:fc:ab:02:df:05:15:1f:cd:ed:07:18:b4:16:41:fe:1d:03:e0:02:b2:12:6f:e7

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate webdisk.ctequebec.com

9

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for webdisk.ctequebec.com

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

autodiscover.ctequebec.com
cpanel.ctequebec.com
cpcalendars.ctequebec.com
cpcontacts.ctequebec.com
ctequebec.com
mail.ctequebec.com
webdisk.ctequebec.com
webmail.ctequebec.com
www.ctequebec.com

Other certificates including the domain name ctequebec.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for webdisk.ctequebec.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArw8w/GXfDVF08b+KT9xz
v6DC0+8W9kRQkDMKdcFycYSa1d+Kjt1QcQYsvXSDCKmXQpqNtcrUKZorAgTmD3Cf
K7DydjAfM0WsH3BEvnLJizgxOnVI3T6ZKw/FBHJqyvrD5J/Rj4D5cS2xggbowp1Q
UpKWX7eCZ8k6KbGgw6tQbYjILdcZQeVV34KBKMFN4EVL7C8HiuA16iziVwQoCevd
B76j7gXQfnMVDFrCBD5BOtsYuSTrgV1N6QA8N9LQNWS8t484ETq4qUTA+rH0JoQ6
SCWcU93g7VsQWw4o2Tj6wP2wx/nPD/Sl5PLkOSgs9GLucySiCAfls5Xnidl7fvKr
cQIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 303170850243884449232740200073851102795229
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-01 08:43:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-30 08:43:42 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'webdisk.ctequebec.com'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 22099194503578209756538195874823123605088491307942615956462775048349155296952533014941441980895331873440506516805896499788293853591477427711778782972941181168185830247679888911300034972413532553348875913157104598513193984692048028587544832172031551354406187050248033286721658060888477382793509138386807937150639592047561406896986820236045009014210009480493019922800150413168685588952767656503959101087238781840167556956577796371673008632668464404157890165217015995974838693423188387518430044844472831249452476705406719312248640273118475172123507744799022990250883828286751261588157467036895357590490613884032455453553
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							9fa1ec4cd51626ca8b7ab128bb811c87cadc794c
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (99 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.int-x3.letsencrypt.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cert.int-x3.letsencrypt.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (206 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpcalendars.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpcontacts.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.ctequebec.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ctequebec.com'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (69 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb27300000171352003d10000040300473045022100ef7dfda2f317881e00532df1cdb7845ea435a64d9e7acd88e8568c4c3959020802205d46b8b61a9d3abb3726611e7bc9b38ad92948820487d6e47e0fd1d1451881b900760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000171352003fd000004030047304502207b66635b495a22f2c04bd2e8490235c20ce14852ef661c11dbd5da87ddccfe9d022100f25d35bd88f8ca154b788ff2ce18609469a619eb65294728b68515225fcc2854
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		009104085eee6ad70c7d9614656df52b62634fb0ec17dfa7373218044edd4ab3f815938a1d0b6f01cfa08a2a8c4d40cfc2cd9d021749588646eeb828fe9643c44599b89d5df4e998e1eafa858ca7ca06bdb26df7ac1ca943a9c2c3448bfe4b57c6b89a6b20283df522503db9e48618e5e9ceb0b047b7d6378e644b4b08d371df34ba18ecd30efa576293b1727643704fcd14a7060e2b03e718cfbf8e657e6175372fb2eabce9d5a5115eb9da6000fcf6a57b9dbfbd30c274dde50d5723d4173a2dd7c03e0f0c9280d62a30fd1eff131a21ac3ee0850cc4967ae185fc2265e563a9f8eb913b12a0b7f1ac134bdfd684cb1f02e8769d66656fc483f90b8a283a0a53