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<h3><a href="/post/command_to_test_main_ssl/">[筆記] 測試mail server 的SSL憑證的指令 Command to test mailserver SSL</a></h3>
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<div class="meta">
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<span class="date moment">2019-03-20</span>
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<span class="author"><a href="/author/eric-chang">Eric Chang</a></span>
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</div>
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<p>今天老闆出國，發slack說手機不能寄信，看了一下，似乎是因為用GMAIL的APP來收信</p>
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<p>然後google 不知道跟人家改了什麼，結果不接受原本的認證了… WTF ….</p>
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<p>然後，這問題應該很久了，結果現在才在講 ….</p>
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<p>
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底下都是用linux 主機來進行測試</p>
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<p>windows環境應該也可以，只是要自己去安裝 openssl 軟體</p>
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<p>To verify SSL, connect to any Linux server via SSH and use the instructions below:</p>
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<p><strong>測試 SSL-IMAP 993 port</strong></p>
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<pre><code>openssl s_client -showcerts -connect mail.example.com:993
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</code></pre>
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<p>結果應該會像是這樣</p>
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<pre><code>2019-03-20 11:21:02 [changch@hqdc034 ~]$ openssl s_client -showcerts -connect mail.abc.com:993
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CONNECTED(00000003)
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depth=0 C = TW, ST = Taipei, L = Taipei, O = iredmail02.abc.com, OU = IT, CN = iredmail02.abc.com, emailAddress = root@iredmail02.abc.com
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verify error:num=18:self signed certificate
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verify return:1
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depth=0 C = TW, ST = Taipei, L = Taipei, O = iredmail02.abc.com, OU = IT, CN = iredmail02.abc.com, emailAddress = root@iredmail02.abc.com
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verify return:1
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---
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Certificate chain
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0 s:/C=TW/ST=Taipei/L=Taipei/O=iredmail02.abc.com/OU=IT/CN=iredmail02.abc.com/emailAddress=root@iredmail02.abc.com
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i:/C=TW/ST=Taipei/L=Taipei/O=iredmail02.abc.com/OU=IT/CN=iredmail02.abc.com/emailAddress=root@iredmail02.abc.com
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-----BEGIN CERTIFICATE-----
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MIIEQTCCAymgAwIBAgIJAJksSxoDSMTLMA0GCSqGSIb3DQEBCwUAMIG2MQswCQYD
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VQQGEwJUVzEPMA0GA1UECAwGVGFpcGVpMQ8wDQYDVQQHDAZUYWlwZWkxIzAhBgNV
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BAoMGmlyZWRtYWlsMDIuZW1hdHRlcnMuY29tLnR3MQswCQYDVQQLDAJJVDEjMCEG
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A1UEAwwaaXJlZG1haWwwMi5lbWF0dGVycy5jb20udHcxLjAsBgkqhkiG9w0BCQEW
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H3Jvb3RAaXJlZG1haWwwMi5lbWF0dGVycy5jb20udHcwHhcNMTQwOTI0MTA1MjA2
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WhcNMjQwOTIxMTA1MjA2WjCBtjELMAkGA1UEBhMCVFcxDzANBgNVBAgMBlRhaXBl
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aTEPMA0GA1UEBwwGVGFpcGVpMSMwIQYDVQQKDBppcmVkbWFpbDAyLmVtYXR0ZXJz
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LmNvbS50dzELMAkGA1UECwwCSVQxIzAhBgNVBAMMGmlyZWRtYWlsMDIuZW1hdHRl
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cnMuY29tLnR3MS4wLAYJKoZIhvcNAQkBFh9yb290QGlyZWRtYWlsMDIuZW1hdHRl
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cnMuY29tLnR3MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvwNtZSdi
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tDxSLNtFiIFv4Ww0+TwtuJAs6yUjQmfHa8CQDoSO/5EmUE2n4VA/78Qb/l/Si5tR
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1FcTY2fifzXJfKkC5kMfoxkevyVqGCw3ZKku/QclaGunmLr/xCndbxbmx28T6PYJ
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73ZrM9viRsE9Cn397IXZWOK+YFIxShhUFZrz1RxDk3cIU+MubBq7/A9Af8Izq9RK
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w1vYK8+Jg81rOerQy71THxuUO5t+uFRzHuKGl8w8TnTt+Gnqx02UWFyHHtlVvhYV
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Bi985OtvP0liApUQM7X4FPK/9cgNIlnXIi+SzQ2qtjqLNUHfO4P7GZ0IezIlFCHJ
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ylx7GAj/tXm7HQIDAQABo1AwTjAdBgNVHQ4EFgQUgedf/rCzYD2FkR9C+kurh3Tj
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2jcwHwYDVR0jBBgwFoAUgedf/rCzYD2FkR9C+kurh3Tj2jcwDAYDVR0TBAUwAwEB
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/zANBgkqhkiG9w0BAQsFAAOCAQEAdFwoT/Y+76bDVxKn6ZW2hY0zcRe71MV4M6L1
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AaObMEEBFg3C4oDZJTEyLItT2YNQ8SyNue9GstTwoZeMBiJ+sTt82f4d3KuaPynO
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3ArnEGEektuaOs449eLHqLZVyGgMl7LMjThLntlTfBqD6cnmrcRpGdMUffCVAL9o
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xzT9cgS6nOQIDo4uTPi7V8hqo+ioBzQXernomETW8TYocezw+XoaZB0rx4oo7uj9
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zBih574GxNMcLreus5b8shEVWWlvReYkGjiHO70j818zOv4pmeJgNmkIEUW068TV
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EybQFb6GZt3n3HWAbCc/ohaqUAoHc6S0P38xWRpLKyqvKEtjzw==
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-----END CERTIFICATE-----
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---
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Server certificate
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subject=/C=TW/ST=Taipei/L=Taipei/O=iredmail02.abc.com/OU=IT/CN=iredmail02.abc.com/emailAddress=root@iredmail02.abc.com
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issuer=/C=TW/ST=Taipei/L=Taipei/O=iredmail02.abc.com/OU=IT/CN=iredmail02.abc.com/emailAddress=root@iredmail02.abc.com
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---
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No client certificate CA names sent
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---
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SSL handshake has read 1784 bytes and written 453 bytes
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---
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New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
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Server public key is 2048 bit
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Secure Renegotiation IS supported
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Compression: NONE
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Expansion: NONE
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SSL-Session:
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Protocol : TLSv1.2
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Cipher : ECDHE-RSA-AES256-GCM-SHA384
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Session-ID: 44738AF637D8531FE4554D30FC2D33428A17BD3B63C38C9D51EA18567D77F9F4
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Session-ID-ctx:
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Master-Key: BEC2C876D0BE5066B7A1EC6BC06B8B72169FF6D6ADC77C45A080F6B7FCB23911134F815802BA80FC106C1E39F5FD28C3
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Key-Arg : None
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PSK identity: None
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PSK identity hint: None
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SRP username: None
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TLS session ticket lifetime hint: 300 (seconds)
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TLS session ticket:
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0000 - 22 77 be c5 f2 e7 14 e1-b0 dc 1d 0b 00 a1 11 47 "w.............G
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0010 - a0 c5 b5 26 fb 15 b7 07-60 9a 79 8a a6 a5 45 77 ...&....`.y...Ew
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0020 - 74 de 1f 1e 8f b6 4d 29-66 6e 07 38 f3 d5 d8 35 t.....M)fn.8...5
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0030 - 2a 83 36 56 6f d7 0e c6-19 95 60 c5 3f 3c 9b 25 *.6Vo.....`.?<.%
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0040 - 75 0e 2a b6 57 cf 74 ad-36 e8 60 ee 37 30 ca e9 u.*.W.t.6.`.70..
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0050 - e1 42 b2 28 7e 03 df 1a-50 0c 31 ce d1 97 f2 84 .B.(~...P.1.....
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0060 - 2a 89 e1 c9 79 37 e1 37-9a f8 7f 8b 54 e0 ef 72 *...y7.7....T..r
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0070 - 4f 97 f1 92 24 b1 c5 9c-97 e1 03 cf 93 7b d8 e7 O...$........{..
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0080 - 72 6e 3d 33 a2 84 ea c3-9f 26 7f ae 99 29 88 04 rn=3.....&...)..
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0090 - 20 86 63 d2 7d ef b1 da-46 6f 3b 3c 4d dc 39 f2 .c.}...Fo;<M.9.
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Start Time: 1553052073
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Timeout : 300 (sec)
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Verify return code: 18 (self signed certificate)
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---
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* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN] Dovecot (Ubuntu) ready.
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2019-03-20 11:21:47 [changch@hqdc034 ~]$
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</code></pre>
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<p><strong>測試SMTP TLS 587 port</strong></p>
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<pre><code>openssl s_client -starttls smtp -showcerts -connect mail.example.com:587
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</code></pre>
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<p>指令有點不同，要加上 startls smtp 的參數
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回應應該會是這樣</p>
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<pre><code>2019-03-20 11:50:48 [changch@hqdc034 ~]$ openssl s_client -starttls smtp -showcerts -connect mail.abc.com:587
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CONNECTED(00000003)
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depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
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verify error:num=20:unable to get local issuer certificate
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verify return:0
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---
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Certificate chain
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0 s:/CN=mail.abc.com
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i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
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-----BEGIN CERTIFICATE-----
|
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MIIFXjCCBEagAwIBAgISA1Tg+poqmT+Vztc+/L2IPUHiMA0GCSqGSIb3DQEBCwUA
|
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MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
|
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ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAyMjAyMzM0MjZaFw0x
|
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OTA1MjEyMzM0MjZaMB8xHTAbBgNVBAMTFG1haWwuZW1hdHRlcnMuY29tLnR3MIIB
|
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IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuhyXC0sCNccrqteycHst8ykZ
|
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|
JSLxXB/07GBkvpdaCSKqTFAjtUh9IpkyDna1+IMtQIX+jeDWvd/GMJ3lj1pCgM+X
|
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je850oFBp+HxMXTSDN67RMPbZsgAt9I938uigYmICHCqn4+FrnlfEOuX24326Y5Z
|
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qEnguvZIdXYbQ5fzdMjP4W4Byu9cQAR+IUEWpFZ+hFNETAOVlNFb5kzsESWPTwIk
|
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XWpDeQLQN6Iixf/ISXduJZSbOsFknAk7Dfrfine2cN9uYFCaiI2MJzrZ472Gbx+d
|
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|
RnR6OmCinJ6Pb4yFQl2wQfGxnNyVCKTGu8JC+DM+j/Jfg1YYkxF4r/RdepPOTQID
|
|
|
AQABo4ICZzCCAmMwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB
|
|
|
BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSaA9/Ki7j6XwUFm5af
|
|
|
X4WYJQNFIDAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF
|
|
|
BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j
|
|
|
cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j
|
|
|
cnlwdC5vcmcvMB8GA1UdEQQYMBaCFG1haWwuZW1hdHRlcnMuY29tLnR3MEwGA1Ud
|
|
|
IARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0
|
|
|
dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBAgYKKwYBBAHWeQIEAgSB8wSB8ADu
|
|
|
AHUA4mlLribo6UAJ6IYbtjuD1D7n/nSI+6SPKJMBnd3x2/4AAAFpDXmYTAAABAMA
|
|
|
RjBEAiBwIf9s7zBBuh/HUso4GWcZcAaEp2LsqT3xuJNOt7EWDAIgXE+u1JRVVEit
|
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|
vi0PWIyfmUhBV8HP9GZ7r7uv2/9vGoYAdQBj8tvN6DvMLM8LcoQnV2szpI1hd4+9
|
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|
daY4scdoVEvYjQAAAWkNeZiVAAAEAwBGMEQCIAZHUtzIl+6UvusG0cpYTiN5cFav
|
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|
hzFQMoGeA5L5bSRvAiARX/+xnhtF9lUcXOsJfST1Eghk4Gm7QGno8vbcD3JHnzAN
|
|
|
BgkqhkiG9w0BAQsFAAOCAQEAI3buq7vydxeDpwSYVToAockocOMwXTyORIo6tACg
|
|
|
Z8gmVVTU6jliwrGWGzsjGh/V0gU+beDtlKzJpsYqbAWGOne1uuuKoH++lHO1KrrB
|
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|
Br0R+G/UlIhRIZuSCdUGylWkV1ZQbHPtfw3MBB4nNj6wU0/tluxrqHJme/tyRSCs
|
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WiP/DSfzIUkGUSSXyd3oEjwBdmq7NAmck3FK24HgBcJ3PSExChw4+TsEmGicpCKP
|
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|
Q5AKt+n4b52tnp51P7rBHSFdmNL4AZiiQtZNXVmAQ2GI9zCwKguQg2c3YJ2oF39m
|
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1GnjpLMRQkv5x6GQi7rglwB9ROH92Lg+uSD1vzjfiFwQeQ==
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-----END CERTIFICATE-----
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1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
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i:/O=Digital Signature Trust Co./CN=DST Root CA X3
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-----BEGIN CERTIFICATE-----
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|
|
MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/
|
|
|
MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
|
|
|
DkRTVCBSb290IENBIFgzMB4XDTE2MDMxNzE2NDA0NloXDTIxMDMxNzE2NDA0Nlow
|
|
|
SjELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUxldCdzIEVuY3J5cHQxIzAhBgNVBAMT
|
|
|
GkxldCdzIEVuY3J5cHQgQXV0aG9yaXR5IFgzMIIBIjANBgkqhkiG9w0BAQEFAAOC
|
|
|
AQ8AMIIBCgKCAQEAnNMM8FrlLke3cl03g7NoYzDq1zUmGSXhvb418XCSL7e4S0EF
|
|
|
q6meNQhY7LEqxGiHC6PjdeTm86dicbp5gWAf15Gan/PQeGdxyGkOlZHP/uaZ6WA8
|
|
|
SMx+yk13EiSdRxta67nsHjcAHJyse6cF6s5K671B5TaYucv9bTyWaN8jKkKQDIZ0
|
|
|
Z8h/pZq4UmEUEz9l6YKHy9v6Dlb2honzhT+Xhq+w3Brvaw2VFn3EK6BlspkENnWA
|
|
|
a6xK8xuQSXgvopZPKiAlKQTGdMDQMc2PMTiVFrqoM7hD8bEfwzB/onkxEz0tNvjj
|
|
|
/PIzark5McWvxI0NHWQWM6r6hCm21AvA2H3DkwIDAQABo4IBfTCCAXkwEgYDVR0T
|
|
|
AQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAYYwfwYIKwYBBQUHAQEEczBxMDIG
|
|
|
CCsGAQUFBzABhiZodHRwOi8vaXNyZy50cnVzdGlkLm9jc3AuaWRlbnRydXN0LmNv
|
|
|
bTA7BggrBgEFBQcwAoYvaHR0cDovL2FwcHMuaWRlbnRydXN0LmNvbS9yb290cy9k
|
|
|
c3Ryb290Y2F4My5wN2MwHwYDVR0jBBgwFoAUxKexpHsscfrb4UuQdf/EFWCFiRAw
|
|
|
VAYDVR0gBE0wSzAIBgZngQwBAgEwPwYLKwYBBAGC3xMBAQEwMDAuBggrBgEFBQcC
|
|
|
ARYiaHR0cDovL2Nwcy5yb290LXgxLmxldHNlbmNyeXB0Lm9yZzA8BgNVHR8ENTAz
|
|
|
MDGgL6AthitodHRwOi8vY3JsLmlkZW50cnVzdC5jb20vRFNUUk9PVENBWDNDUkwu
|
|
|
Y3JsMB0GA1UdDgQWBBSoSmpjBH3duubRObemRWXv86jsoTANBgkqhkiG9w0BAQsF
|
|
|
AAOCAQEA3TPXEfNjWDjdGBX7CVW+dla5cEilaUcne8IkCJLxWh9KEik3JHRRHGJo
|
|
|
uM2VcGfl96S8TihRzZvoroed6ti6WqEBmtzw3Wodatg+VyOeph4EYpr/1wXKtx8/
|
|
|
wApIvJSwtmVi4MFU5aMqrSDE6ea73Mj2tcMyo5jMd6jmeWUHK8so/joWUoHOUgwu
|
|
|
X4Po1QYz+3dszkDqMp4fklxBwXRsW10KXzPMTZ+sOPAveyxindmjkW8lGy+QsRlG
|
|
|
PfZ+G6Z6h7mjem0Y+iWlkYcV4PIWL1iwBi8saCbGS5jN2p8M+X+Q7UNKEkROb3N6
|
|
|
KOqkqm57TH2H3eDJAkSnh6/DNFu0Qg==
|
|
|
-----END CERTIFICATE-----
|
|
|
---
|
|
|
Server certificate
|
|
|
subject=/CN=mail.abc.com
|
|
|
issuer=/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
|
|
|
---
|
|
|
No client certificate CA names sent
|
|
|
---
|
|
|
SSL handshake has read 3279 bytes and written 456 bytes
|
|
|
---
|
|
|
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
|
|
|
Server public key is 2048 bit
|
|
|
Secure Renegotiation IS supported
|
|
|
Compression: NONE
|
|
|
Expansion: NONE
|
|
|
SSL-Session:
|
|
|
Protocol : TLSv1.2
|
|
|
Cipher : ECDHE-RSA-AES256-GCM-SHA384
|
|
|
Session-ID: F9FF6D75A3923A3B4E2CFBECC3DEAE2402FA99DA2B0746B6A2BF7E7E49F2E4D6
|
|
|
Session-ID-ctx:
|
|
|
Master-Key: 62D845C4754634DCDAE1AB544B06929504C6310B3CD6E4512E3718535D871F1115A78DB46FA608159F52169DE4D9E12F
|
|
|
Key-Arg : None
|
|
|
PSK identity: None
|
|
|
PSK identity hint: None
|
|
|
SRP username: None
|
|
|
Start Time: 1553053873
|
|
|
Timeout : 300 (sec)
|
|
|
Verify return code: 20 (unable to get local issuer certificate)
|
|
|
---
|
|
|
250 DSN
|
|
|
|
|
|
</code></pre>
|
|
|
|
|
|
<p><strong>測試 SMTP SSL port 465</strong>
|
|
|
指令
|
|
|
<pre>
|
|
|
openssl s_client -showcerts -connect mail.example.com:465
|
|
|
</pre></p>
|
|
|
|
|
|
<p>不過因為我沒開這個port ，所以就不測試了</p>
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