civility.social我们使用 certbot 从 Let's Encrypt 获得了和的通配符证书*.civility.social。这在所有浏览器上都可以正常工作，并且在验证时可以使用 curl 和 wgethttps://civility.social或https://graphql.civility.social。这些（子）域的 A 记录指向完成 certbot 挑战的同一台服务器。
后来，我们添加了托管在不同服务器上的子域名meet.。在不同的服务器上使用相同的证书，我们将组成通配符证书的文件从原始服务器复制到meet.。 两个服务器都使用 NGINX。 问题是wget和curl无法从 提取任何内容meet.civility.social，即使浏览器没有抱怨。wget即使 也会失败--no-check-certificate。
$ $ wget -v --debug --no-check-certificate https://meet.civility.social
Setting --check-certificate (checkcertificate) to 0
Setting --check-certificate (checkcertificate) to 0
DEBUG output created by Wget 1.20.3 on linux-gnu.
Reading HSTS entries from ~/.wget-hsts
URI encoding = ‘UTF-8’
Converted file name 'index.html' (UTF-8) -> 'index.html' (UTF-8)
--2020-06-26 21:39:15-- https://meet.civility.social/
Resolving meet.civility.social (meet.civility.social)... 157.245.170.94
Caching meet.civility.social => 157.245.170.94
Connecting to meet.civility.social (meet.civility.social)|157.245.170.94|:443... connected.
Created socket 3.
Releasing 0x000055ae59be63e0 (new refcount 1).
Initiating SSL handshake.
SSL handshake failed.
Closed fd 3
Unable to establish SSL connection.
$ curl https://meet.civility.social/
curl: (60) SSL certificate problem: unable to get local issuer certificate
这里可能发生什么事？
答案1
您需要更新ca-certificates软件包。
在我的计算机上没有 SSL 错误：
mvutcovici@DESKTOP-QMNRLV6:~$ curl -v https://graphql.civility.social
* Trying 167.71.155.126:443...
* TCP_NODELAY set
* Connected to graphql.civility.social (167.71.155.126) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use h2
* Server certificate:
* subject: CN=civility.social
* start date: Jun 6 08:45:19 2020 GMT
* expire date: Sep 4 08:45:19 2020 GMT
* subjectAltName: host "graphql.civility.social" matched cert's "*.civility.social"
* issuer: C=US; O=Let's Encrypt; CN=Let's Encrypt Authority X3
* SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x563dffb227c0)
> GET / HTTP/2
> Host: graphql.civility.social
> user-agent: curl/7.68.0
> accept: */*
>
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
* Connection state changed (MAX_CONCURRENT_STREAMS == 128)!
< HTTP/2 500
< server: nginx/1.17.10 (Ubuntu)
< date: Sat, 27 Jun 2020 05:27:14 GMT
< content-type: application/json; charset=utf-8
< content-length: 153
< access-control-allow-origin: *
< etag: W/"99-9KmtOnsArqM8/UCTY4AvEYVjSiM"
< strict-transport-security: max-age=63072000
<
{"errors":[{"message":"Context creation failed: Incorrect method GET from 199.241.131.83 requesting {}","extensions":{"code":"INTERNAL_SERVER_ERROR"}}]}
* Connection #0 to host graphql.civility.social left intact
mvutcovici@DESKTOP-QMNRLV6:~$
编辑1：
对于 meet.civility.social，Web 服务器未发送中间证书。您可以使用 WireShark 中的网络捕获看到这一点。您仅提供了涵盖*.civility.social和的证书，但省略了civility.social中间证书。应注意安装正确的中间证书，有关更多详细信息，请参阅：Let's Encrypt Authority X3certbothttps://letsencrypt.org/certificates/
您需要连接服务器和中间证书：
# civility.social
-----BEGIN CERTIFICATE-----
MIIFaTCCBFGgAwIBAgISA4ROk0Mr6HcT5XbuumfDaJrDMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDA2MDYwODQ1MTlaFw0y
MDA5MDQwODQ1MTlaMBoxGDAWBgNVBAMTD2NpdmlsaXR5LnNvY2lhbDCCASIwDQYJ
KoZIhvcNAQEBBQADggEPADCCAQoCggEBAMLtBpnuOOOwKUo3j7sTASUcidiE3yVA
LN56oK9wIY5uJ9kqJTRjFDbQrAIfaAv3p6b1KNBEfuBQ6TRbWEuRrFDi4WUCaNQS
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dMmfjzfzl0U9002tjLmY5iUknRf6EIJxrgPb2E81Ay47vsL4FS7AWNvsF3jOomQh
RdP4IjUs3NvmUF7x5YRWFWO9aOabLotc2L4FKiVeLRUGMMgXLwmDy98CAwEAAaOC
AncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB
BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUpViiA3AsreWjZkSAaOSW+fal
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b3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQu
b3JnLzAtBgNVHREEJjAkghEqLmNpdmlsaXR5LnNvY2lhbIIPY2l2aWxpdHkuc29j
aWFsMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYB
BQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIE
AgSB9QSB8gDwAHYA5xLysDd+GmL7jskMYYTx6ns3y1YdESZb8+DzS/JBVG4AAAFy
iQU30AAABAMARzBFAiAr8zcVbe0ZZD9/hTkvMUe6YE9WE26xqsjhBGE7F4BZ2QIh
ALUtrBQy/FZxIJ+54tvSyS9V3x5DrHEjLYrVSX+XfW6nAHYAB7dcG+V9aP/xsMYd
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d7gg/ttmtCml99Ud5vhWTJFc7ORJVGO2zp4IO2QxBg8aDVIDjIr/QmgUT7+Fdjyi
FXJ1m1KMJIs3gySY1gfBXMN4wSCVmTMlXds1ukGrwrR86ZshmBhIHe/qOnt+o5nT
Y4DGWpWffEp4eNk5EzVAgnXpLFva4JpDJgmtSwBOzIHQEDieqP5JsApRAgt+WYLv
BQwYQsKya/YLCHTzp5MVOjVWpGo+jHSFQEPaxR8MiFfMNSO3+Ymxc4X1w0kHvxFt
aXqTubdI9BoqEcB7d0qnApY2Bw7hkSOgzsgy4r4dvrasLTW+xjAB7S2iXbfP
-----END CERTIFICATE-----
# Let's Encrypt Authority X3
-----BEGIN CERTIFICATE-----
MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/
MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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AAOCAQEA3TPXEfNjWDjdGBX7CVW+dla5cEilaUcne8IkCJLxWh9KEik3JHRRHGJo
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wApIvJSwtmVi4MFU5aMqrSDE6ea73Mj2tcMyo5jMd6jmeWUHK8so/joWUoHOUgwu
X4Po1QYz+3dszkDqMp4fklxBwXRsW10KXzPMTZ+sOPAveyxindmjkW8lGy+QsRlG
PfZ+G6Z6h7mjem0Y+iWlkYcV4PIWL1iwBi8saCbGS5jN2p8M+X+Q7UNKEkROb3N6
KOqkqm57TH2H3eDJAkSnh6/DNFu0Qg==
-----END CERTIFICATE-----