R3 SSL done, but still Not secured

hello, i'm a very beginner who use a synology server.
at the last year, there was no issue to use Let's encrypt SSL certificate.
but, i don't know when this issue began.

the SSL connection test result :
Test Results: peace3461.synology.me - Why No Padlock?

My domain is: https://peace3461.synology.me

I ran this command: "Not secured" via chrome, edge.

It produced this output:

NET::ERR_CERT_AUTHORITY_INVALID
Subject: peace3461.synology.me

Issuer: R3

Expires on: 2021. 9. 16.

Current date: 2021. 8. 6.

PEM encoded chain:
-----BEGIN CERTIFICATE-----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FMi1s2NSUyNRJkpmgy6dsUld6Qqg8ylXMyRQGWzev5j1WoEjpAHIgmvUzr2Q3t9Y
0yMnN8Zr+eZQRhfY+tHxTBmTBY2Jk75vkKXi3OZMpNpgmFNSK8gYU3UemUPrt5iN
wPk6sqCQz4d2rF7Lz3bXsKUZTddiNdVcYmIDLUHu6/UYI0BQR7fdniVgEQ==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjAwOTA0MDAwMDAw
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RW5jcnlwdDELMAkGA1UEAxMCUjMwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
AoIBAQC7AhUozPaglNMPEuyNVZLD+ILxmaZ6QoinXSaqtSu5xUyxr45r+XXIo9cP
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avAuvDszue5L3sz85K+EC4Y/wFVDNvZo4TYXao6Z0f+lQKc0t8DQYzk1OXVu8rp2
yJMC6alLbBfODALZvYH7n7do1AZls4I9d1P4jnkDrQoxB3UqQ9hVl3LEKQ73xF1O
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hCExroL1+7mryIkXPeFM5TgO9r0rvZaBFOvV2z0gp35Z0+L4WPlbuEjN/lxPFin+
HlUjr8gRsI3qfJOQFy/9rKIJR0Y/8Omwt/8oTWgy1mdeHmmjk7j1nYsvC9JSQ6Zv
MldlTTKB3zhThV1+XWYp6rjd5JW1zbVWEkLNxE7GJThEUG3szgBVGP7pSWTUTsqX
nLRbwHOoq7hHwg==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4
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MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc
h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+
0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U
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rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV
HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq
hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL
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3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK
NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5
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jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc
oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq
4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA
mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d
emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=
-----END CERTIFICATE-----

Certificate Transparency:

SCT DigiCert Yeti2021 Log (Embedded in certificate, Verified)

SCT Google 'Argon2021' log (Embedded in certificate, Verified)

My web server is (include version): Synology

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know): maybe yes, but i don't want to do something for the DSM default setting cause i'm very beginner.

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): could do by DSM setting panel.

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

Your cert and chain seems to be fine when I check it with OpenSSL from here and also my Chromium works nicely: no certificate error, I can see your Synology login screen perfectly?

Perhaps you need to clear the browsers cache?

I also can't find any real reason why you would get such a warning.
Even when checking on port 5001, it still looks good :slight_smile:

I would try appending this cert to your chain and see if your problems subside:

-----BEGIN CERTIFICATE-----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PRmP6zjzZN7IKw0KKP/32+IVQtQi0Cdd4Xn+GOdwiK1O5tmLOsbdJ1Fu/7xk9TND
TwIDAQABo4IBRjCCAUIwDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMCAQYw
SwYIKwYBBQUHAQEEPzA9MDsGCCsGAQUFBzAChi9odHRwOi8vYXBwcy5pZGVudHJ1
c3QuY29tL3Jvb3RzL2RzdHJvb3RjYXgzLnA3YzAfBgNVHSMEGDAWgBTEp7Gkeyxx
+tvhS5B1/8QVYIWJEDBUBgNVHSAETTBLMAgGBmeBDAECATA/BgsrBgEEAYLfEwEB
ATAwMC4GCCsGAQUFBwIBFiJodHRwOi8vY3BzLnJvb3QteDEubGV0c2VuY3J5cHQu
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MA0GCSqGSIb3DQEBCwUAA4IBAQAKcwBslm7/DlLQrt2M51oGrS+o44+/yQoDFVDC
5WxCu2+b9LRPwkSICHXM6webFGJueN7sJ7o5XPWioW5WlHAQU7G75K/QosMrAdSW
9MUgNTP52GE24HGNtLi1qoJFlcDyqSMo59ahy2cI2qBDLKobkx/J3vWraV0T9VuG
WCLKTVXkcGdtwlfFRjlBz4pYg1htmf5X6DYO8A4jqv2Il9DjXA6USbW1FzXSLr9O
he8Y4IWS6wY7bCkjCWDcRQJMEhg76fsO3txE+FiYruq9RUWhiF1myv4Q6W+CyBFC
Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5
-----END CERTIFICATE-----

If so, then your certificate store is likely outdated.

Thanks, already done. but... there is no effect.

1 Like

thanks, but, still problem.

the message of Edge, Chrome is the certificate is not valid.
(however, the end date of R3 certificate is 2021-Sep-16. )

OS: windows 10 home
ver: 20H2
install date : 2021-mar-15
OS build : 19042.1083

in case of accessing my phone (android 10), there is no problem.

is this problem only for my computer ?

1 Like

Looks good to me on Chrome and Edge (Windows 11). Check your computers date and time is accurate to the minute (let windows set it automatically) and make sure you are accessing your own website through the exact same website address (not a local machine name);

If there is an error in Chrome it will usually show a more specific ERR_ message that describes the problem. I assume you are not using any local proxying tools or http debugging tools.

1 Like

I don't see the additional cert that I provided you.

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