Hi there.
As I found out, the ssl_error_internal_error_alert - Error I got is jut because I am using Cloudflare between my Server/Web-Sites and Internet.
$ openssl s_client -connect www.bd78.de:443
CONNECTED(00000003)
25774:error:14077438:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert internal error:s23_clnt.c:607:
$ openssl s_client -connect bd78.de:443
CONNECTED(00000003)
depth=1 /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/CN=bd78.de
i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
i:/O=Digital Signature Trust Co./CN=DST Root CA X3
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIE9TCCA92gAwIBAgISATbnTZxLyfPhphLL1D2oEOt2MA0GCSqGSIb3DQEBCwUA
From the Outside:
$ host www.eisbaer-blog.de
www.eisbaer-blog.de is an alias for www.eisbaer-blog.de.cdn.cloudflare.net.
www.eisbaer-blog.de.cdn.cloudflare.net has address 104.24.127.88
www.eisbaer-blog.de.cdn.cloudflare.net has address 104.24.126.88
www.eisbaer-blog.de.cdn.cloudflare.net has IPv6 address 2400:cb00:2048:1::6818:7e58
www.eisbaer-blog.de.cdn.cloudflare.net has IPv6 address 2400:cb00:2048:1::6818:7f58
on my server:
$ host eisbaer-blog.de
eisbaer-blog.de has address 92.51.135.16
eisbaer-blog.de has IPv6 address 2a01:488:66:1000:53a9:12a6:0:1
eisbaer-blog.de mail is handled by 10 mail.eisbaer-blog.de.
wird ein Zertifikat ausgeliefert:
$ openssl s_client -connect eisbaer-blog.de:443
CONNECTED(00000003)
depth=1 /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/CN=bd78.de
i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X1
i:/O=Digital Signature Trust Co./CN=DST Root CA X3
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIE9TCCA92gAwIBAgISATbnTZxLyfPhphLL1D2oEOt2MA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMTAeFw0xNTExMDUyMDUzMDBaFw0x
Any ideas how to solve it expect to deactivate Cloudflare?