Download cert.pem and privkey.pem, install to your private system.
For example:
https://192-168-0-1.ip4a.net/
ip4a.net.cert-2025-06-01.tar.gz
SHA256 (./ip4a.net.cert-2025-06-01.tar.gz) = 444085a85e221cbd165041c80d1c61540896d5f5fd96c25f0b5e5094a8fbaad8
# openssl x509 -in ./cert.pem -text -noout
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
05:2c:1d:af:47:d2:4a:ac:b7:8b:10:5a:a3:37:e7:08:38:6d
Signature Algorithm: ecdsa-with-SHA384
Issuer: C = US, O = Let's Encrypt, CN = E5
Validity
Not Before: Jun 1 00:04:18 2025 GMT
Not After : Aug 30 00:04:17 2025 GMT
Subject: CN = *.ip4a.net
Subject Public Key Info:
Public Key Algorithm: id-ecPublicKey
Public-Key: (256 bit)
pub:
04:a0:20:a1:3a:c3:49:df:36:c8:68:32:01:f0:45:
ee:00:eb:d5:86:06:e6:68:bd:b0:ae:10:4b:f8:5d:
dd:4a:b1:97:d0:ef:bd:c5:33:07:4a:05:c1:ef:8a:
8b:e5:03:b9:46:05:1b:42:e3:d1:ec:da:b0:26:f4:
97:24:b5:5c:0d
ASN1 OID: prime256v1
NIST CURVE: P-256
X509v3 extensions:
X509v3 Key Usage: critical
Digital Signature
X509v3 Extended Key Usage:
TLS Web Server Authentication, TLS Web Client Authentication
X509v3 Basic Constraints: critical
CA:FALSE
X509v3 Subject Key Identifier:
3F:88:4B:3D:77:A5:7F:6B:F0:7C:0A:EE:1A:56:6B:0B:4E:B5:F3:7D
X509v3 Authority Key Identifier:
9F:2B:5F:CF:3C:21:4F:9D:04:B7:ED:2B:2C:C4:C6:70:8B:D2:D7:0D
Authority Information Access:
CA Issuers - URI:http://e5.i.lencr.org/
X509v3 Subject Alternative Name:
DNS:*.ip4a.net, DNS:ip4a.net
X509v3 Certificate Policies:
Policy: 2.23.140.1.2.1
X509v3 CRL Distribution Points:
Full Name:
URI:http://e5.c.lencr.org/110.crl
CT Precertificate SCTs:
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D:
26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54
Timestamp : Jun 1 01:02:48.190 2025 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:20:16:3F:81:FC:CB:70:28:E8:BE:92:6C:C9:
83:68:71:0C:1F:A7:6A:8B:45:9E:1F:33:D8:41:06:78:
EC:AA:30:7F:02:21:00:CE:04:7A:66:60:FA:64:88:82:
BD:7D:F8:60:0D:33:DA:2F:6F:CD:42:67:A5:43:DE:9F:
D1:D7:EF:4B:D3:4A:1B
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
Timestamp : Jun 1 01:02:48.193 2025 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:46:02:21:00:A4:08:C5:E5:BD:5E:96:2B:55:E2:41:
BE:DD:B4:02:1E:B5:F7:8D:00:B8:ED:31:BC:B2:FC:FD:
54:57:A0:42:A8:02:21:00:ED:86:6B:87:E4:7C:57:C5:
18:3C:A0:75:30:FB:3E:AF:E3:0A:B6:AC:B6:FB:05:BE:
EC:8A:D5:C8:7F:26:64:21
Signature Algorithm: ecdsa-with-SHA384
Signature Value:
30:66:02:31:00:c3:39:31:d5:04:6b:cd:f8:a8:f4:70:9c:32:
05:8d:3f:04:8c:9d:0d:42:4c:76:94:43:0e:82:47:1a:fa:70:
b0:b0:8c:c0:53:39:db:b4:4a:3d:5a:4c:27:86:52:97:bb:02:
31:00:ad:4f:75:c7:b1:70:fe:b5:b8:1d:42:2e:61:20:68:a7:
9c:d2:a2:f8:63:e7:29:65:8c:e4:47:55:40:83:5b:49:55:fb:
2e:c5:72:f2:b4:07:2d:14:f1:5a:75:56:48:e7