webmail.sobczyk.eu

Issued by R3

About this certificate

This digital certificate with serial number 04:d0:43:2b:34:0a:d4:6c:ce:4c:10:e4:ce:e4:62:a0:d3:2e was issued on by Let's Encrypt.

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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=webmail.sobczyk.eu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:d0:43:2b:34:0a:d4:6c:ce:4c:10:e4:ce:e4:62:a0:d3:2e
Serial Number (int): 419317158646622016723260912542060843684654
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ca:7c:bc:6a:eb:4f:9b:87:95:1c:69:c5:c3:fb:48:e9:b8:81:bb:0b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 49:97:3c:49:dc:d8:6c:54:55:d0:09:b1:70:57:6d:b4:11:e2:0a:37
Fingerprint (sha256): 5f:cf:9b:76:cf:ba:bb:6f:8c:4e:f7:9c:f2:63:55:94:e9:b6:34:cb:32:8f:aa:9d:c1:d4:83:90:18:13:c5:84

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate webmail.sobczyk.eu

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for webmail.sobczyk.eu

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

webmail.sobczyk.eu

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iot.sobczyk.eu
srv221.sobczyk.eu
srv221.sobczyk.eu
srv191.sobczyk.eu
srv189.sobczyk.eu
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srv191.sobczyk.eu
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srv221.sobczyk.eu
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srv191.sobczyk.eu
srv191.sobczyk.eu
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srv191.sobczyk.eu
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srv191.sobczyk.eu
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www.sobczyk.eu
www.sobczyk.eu

Certificate

The complete raw certificate details for webmail.sobczyk.eu in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx9j5H9STn2Vj2B6wF4+J
WnZD0v6WH+z6eaAy6uiMl5RQZ1qE5pQTeEa3UcdCto1DKVmK6sphkvCUQtzZFL5j
DON8EjU3Ei1DaU5xH1RQVfCwr2JcTEFtpbmFZWz+t2cCe4jV6fTapXLuVtMjW3Bw
GV0e3iIn5gKuwvHENnIAyhaNM/5ZeM3dwsrAOSTFxUU65AT3EcNWlzfKOQa1h12M
8cbpA4+ZU5OdfiEmlZsXvn+EsDUBKWpzwVVPOUyro2SXEKikR0rK2ZDmcWj10klk
ShwuBr+EU1FHIzOhh1Nptcy6I5EIhJfYviyn6XbLXi4Bj1s9Wo+WJ1u8d6jUfyDa
hQIDAQAB
-----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 419317158646622016723260912542060843684654
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-04 05:23:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-03 05:23:13 +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 'webmail.sobczyk.eu'
 . . . . . . . . [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 25228416132238034846952996719824943716727215216782270513184784742797554822101541053028619144392843030257876703239742162252852940196638009149639471713951326328351105780288252436261118452487711409373552734981676836053105033580404913362296471430244871528203027237161405564074239935565306579208873525493168115833345714632942628614259142090865783692721354159745714035970600900846680835203655938415311409372328775500391535361893526587041518388254679440965864783694956192855527803892757863674564527901837837723599880360292676049115561079573394156092223774339377894067563173825944342510275593528974711641739952148014264539781
 . . . . . . . . . . . . . . . . . . . . [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)
							ca7cbc6aeb4f9b87951c69c5c3fb48e9b881bb0b
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.sobczyk.eu'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c337ec4b40000040300473045022039c6be168ac323b0398dba966f2291c551246ca5299ce6c900ec9c17454db5eb022100bfbd4dfb7656d8fc09587bdfed2572ef6d696bca3f74fce467754c43c2a65bfc007500a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018c337ec4d4000004030046304402206fd35df67533a205e8310dacd7d830c5f94fde1f1c78771cc2d2ab95f5c580160220599b47fb5e4520ee25a8c69a317ce8127004d4262d0b7d98044f0fef1e02e3cd
 . . . . [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)
		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