dbowling@res-mpbwj:~/Downloads$ openssl s_client -connect swagg.net:443 | openssl x509 -noout -text
depth=0 CN = swagg.net
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 CN = swagg.net
verify error:num=21:unable to verify the first certificate
verify return:1
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            03:6b:35:46:8c:95:f7:30:c4:46:bc:dd:43:4b:d8:e2:7e:89
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
        Validity
            Not Before: Mar  3 17:14:01 2020 GMT
            Not After : Jun  1 17:14:01 2020 GMT
        Subject: CN=swagg.net
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:ae:31:17:a2:db:39:12:cc:ff:36:24:9f:41:54:
                    0a:db:0a:6f:1a:97:8b:7b:08:61:6f:28:35:9b:2c:
                    58:f4:5f:56:ee:16:e4:e5:58:5a:81:6f:6d:49:76:
                    b2:84:e8:3d:66:ba:d7:53:16:8b:7a:9c:f4:4b:6f:
                    81:06:c0:48:68:18:c2:ba:f7:e1:6c:ec:76:3f:21:
                    0b:a0:3f:ea:f2:4e:35:1f:4d:26:84:e5:3a:c4:93:
                    de:a4:dd:96:9a:e7:30:c3:6a:5c:a6:26:4a:87:de:
                    40:0f:2b:ff:85:cb:cf:d5:34:5f:4a:f4:08:ed:10:
                    aa:17:8e:7a:01:ad:7e:71:fd:dd:1d:a3:d0:4b:5f:
                    51:81:f0:48:2d:5d:a8:8d:9c:3a:e8:ae:d6:1a:8a:
                    ac:b7:c9:2a:93:d8:a3:62:c5:32:40:35:8c:23:d7:
                    f4:b3:6f:a6:41:6a:18:4c:02:7a:f3:c1:95:24:d8:
                    81:eb:58:a0:ed:2a:ff:85:f2:fe:ca:e8:3d:de:0b:
                    dd:25:09:87:2d:ab:3f:5f:d0:c6:40:0a:32:f4:a5:
                    f4:52:46:66:bc:40:b1:a2:70:a4:7d:57:d7:c9:17:
                    6d:34:bd:c3:ec:df:d3:32:bd:7b:15:30:d9:88:d4:
                    37:cc:7e:e2:63:0e:d0:79:f6:18:1c:dc:bb:93:ad:
                    71:6b
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature, Key Encipherment
            X509v3 Extended Key Usage:
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Basic Constraints: critical
                CA:FALSE
            X509v3 Subject Key Identifier:
                9B:7C:91:11:C2:F8:01:BE:04:26:00:B7:BF:0C:5E:CA:03:90:7C:92
            X509v3 Authority Key Identifier:
                keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1

            Authority Information Access:
                OCSP - URI:http://ocsp.int-x3.letsencrypt.org
                CA Issuers - URI:http://cert.int-x3.letsencrypt.org/

            X509v3 Subject Alternative Name:
                DNS:ipv6.swagg.cc, DNS:ipv6.swagg.net, DNS:mirror.swagg.cc, DNS:mirror.swagg.net, DNS:swagg.cc, DNS:swagg.net, DNS:www.swagg.cc, DNS:www.swagg.net
            X509v3 Certificate Policies:
                Policy: 2.23.140.1.2.1
                Policy: 1.3.6.1.4.1.44947.1.1.1
                  CPS: http://cps.letsencrypt.org

            1.3.6.1.4.1.11129.2.4.2:
                ......w.^.s..V...6H}.I.2z.........u..qEX...p...w.....H0F.!..(}@7........F?.....N..BQeoDP..R.!....HE.$.>g