DV SSL/TLS Certificate for smlab.ru

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the smlab.ru DV SSL/TLS Certificate

This certificate with serial number 06:8f:06:64:ca:81:51:0b:31:e6:1e:76:bd:a9:03:00:47:63 for smlab.ru was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for smlab.ru provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 06:8f:06:64:ca:81:51:0b:31:e6:1e:76:bd:a9:03:00:47:63
Serial Number (int): 571342592765208497854604215616300789024611
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: e7:97:c9:9f:dc:4d:cd:ec:fc:f5:60:03:cf:75:e3:2e:86:7b:52:78
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 54:b5:3f:e6:d6:e4:09:25:1c:e3:50:1b:8e:60:88:b2:34:1f:3e:44
Fingerprint (SHA-256): fc:60:6f:d6:a1:92:1e:af:eb:9f:bd:82:ab:60:28:fd:05:49:4d:d2:c5:86:26:75:c3:79:e6:8a:43:cd:93:24

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/100.crl

Check the revocation status for certificate smlab.ru
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for smlab.ru

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for smlab.ru in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxguFLX5cy4W4oRHFCIy7
V5HtVG9lwUVJMojKl7Z+aP+kPUSuivCwO2EoMm9p3vm8XS0V9OHI3p0MGDNr81JX
m7eXK1Ze0RShHN3dZmG7iQ8mYuYGZfWnNeU5dWEb+HgDZEFV5Lco3AyaYGKk1G2j
rj+IVExUj5Ta5/CC9RUXO+0sbh77skCRv8bHu6J3iRB4yX7wFsQwhjSF02OKZEI6
vz8tZPIWYMbQCft7wQS7FKYoEUsh1h7FF+GcMae6jUgDoBjs89WuIYSXDIb95l8U
gKpP6QKkE+a2sKC13VSyJ7UA7c3eluRzM9OrrpuUnRKRgVH0lMhT3Yz3yVJiYGXh
WQIDAQAB
-----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 571342592765208497854604215616300789024611
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-08 03:02:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-06 03:02:42 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'smlab.ru'
 . . . . . . . . [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
 . . . . . . . . . . . . . . . . [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 25000865218165423852230216478102885345887517299093136448293050170151962251963871092081951093042408544070119667820732052854522193245887510246074524432608396238387266828582511238914853500642791809346138731589124524069921912676410615204976902008247989176942346240783739206091687829767673866802019893209787628741420475805841500563619961858109150567214600146771557743207683841037472232998645583869595625866775143683720914069915350862198257623733626158263416424782850732504254235321530592403451379555218448169407640591534465407204529360902391886328856147845331105796060613688587069891190194474999017533965594147566549066073
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							e797c99fdc4dcdecfcf56003cf75e32e867b5278
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'smlab.ru'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.smlab.ru'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.c.lencr.org/100.crl'
 . . . . . . . . . . . . . . . . [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)
							00ef0076000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa34000001974db31bbb000004030047304502206c27ac4e9f45269add32d6ea8be949c1c2019749b20682cd66aeb25d7a9a01e3022100fe2b68103b2e5e4ddbe5102ed63ba88ca4f5ee72181b185dc04b7fe84f38c45e00750012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a000001974db31bc5000004030046304402201558d44183d62f4a3cc273ac56b4efe9f0ca7b7c18cc190cdba912cb61f48ac702201db4fa2ebe2cfe88323c84d244285f2a2e7179fe3d12df5df38c4773decb1778
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		008b95ac737056bc76a32bb5757e5f057305f6919bff642971b1b19d61a897c99c0e42827d735684341dceed4edb6a2ea57735157d209d4ed7752e4a39d4e8545f15dd1f05fb2516e4242f572607823093bb7ebe8f258aa58ec1466dd734095ff7c66ed8fa9fcdf65a3afa580513f9c98abc2dfc5c2d18c9f2199e387cd45db1c7749be8cddd1e560c1cfae6ecb9bf486de160bc251c295159b39c425caed023c6f8a6888b7f2c4d389be9aad3ee2844819bb3b3cd51680de880d27ff0bc5bc75c7e9028c437bfd80eb980da746a390e547d69f88480cbffa34f1ff5de00bb15790bbcac1c68394fc2b8605f96f8e78a070e8cf64f0fa8e7a67988827faff7b410