SSL Report: vpn.averon.ru (212.49.123.234)
Assessed on:  Sun, 08 Jun 2025 15:42:09 UTC | Clear cache
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Summary
Overall Rating
F
0
20
40
60
80
100
Certificate
 
Protocol Support
 
Key Exchange
 
Cipher Strength
 

Visit our documentation page for more information, configuration guides, and books. Known issues are documented here.
This server's certificate is not trusted, see below for details.
Certificate uses an insecure signature. Upgrade to SHA2 to avoid browser warnings.  MORE INFO »
This server supports insecure cipher suites (see below for details). Grade set to F.
This server's certificate is not trusted by major browsers. MORE INFO »
This server supports weak Diffie-Hellman (DH) key exchange parameters. Grade capped to B.   MORE INFO »
There is no support for secure renegotiation.  MORE INFO »
This server does not support Forward Secrecy with the reference browsers. Grade capped to B.  MORE INFO »
This server does not support Authenticated encryption (AEAD) cipher suites. Grade capped to B.  MORE INFO »
This server supports TLS 1.0 and TLS 1.1. Grade capped to B. MORE INFO »
This server does not support TLS 1.3.  MORE INFO »
HTTP Strict Transport Security (HSTS) with long duration deployed on this server.  MORE INFO »
Certificate #1: RSA 2048 bits (SHA1withRSA)
Server Key and Certificate #1
Subject vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
Common names vpn.averon.ru
Alternative names vpn.averon.ru
Serial Number 5588c761000400000622
Valid from Mon, 10 Jul 2023 14:55:18 UTC
Valid until Wed, 09 Jul 2025 14:55:18 UTC (expires in 1 month)
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer int-SRVCA-CA
AIA: http://srvca.int.averon.ru/CertEnroll/int-SRVCA-CA(4).crt
Signature algorithm SHA1withRSA   INSECURE
Extended Validation No
Certificate Transparency No
OCSP Must Staple No
Revocation information CRL
CRL: http://srvca.int.averon.ru/CertEnroll/int-SRVCA-CA(3).crl
Revocation status Unchecked (only trusted certificates can be checked)
DNS CAA No (more info)
Trusted No   NOT TRUSTED (Why?)
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2097 bytes)
Chain issues Contains anchor
#2
Subject int-SRVCA-CA   Not in trust store
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
Valid until Mon, 05 Jun 2028 09:33:46 UTC (expires in 2 years and 11 months)
Key RSA 2048 bits (e 65537)
Issuer int-SRVCA-CA   Self-signed
Signature algorithm SHA1withRSA   Weak, but no impact on root certificate


Certification Paths
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
RSA 2048 bits (e 65537) / SHA1withRSA
INSECURE SIGNATURE
2 Sent by server
  Not in trust store 		int-SRVCA-CA   Self-signed
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
RSA 2048 bits (e 65537) / SHA1withRSA
INSECURE SIGNATURE
2 Sent by server
  Not in trust store 		int-SRVCA-CA   Self-signed
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
RSA 2048 bits (e 65537) / SHA1withRSA
INSECURE SIGNATURE
2 Sent by server
  Not in trust store 		int-SRVCA-CA   Self-signed
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
RSA 2048 bits (e 65537) / SHA1withRSA
INSECURE SIGNATURE
2 Sent by server
  Not in trust store 		int-SRVCA-CA   Self-signed
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server vpn.averon.ru
Fingerprint SHA256: c65ace38d991e2dcbe225ccc0f68aec70e24e7221b6e09d8414666c6148e562d
Pin SHA256: E8awtSQxLq+dfe5CJHQ7NlchLzU7p3hpS3751LDJ02w=
RSA 2048 bits (e 65537) / SHA1withRSA
INSECURE SIGNATURE
2 Sent by server
  Not in trust store 		int-SRVCA-CA   Self-signed
Fingerprint SHA256: a18f4198cb12374bdb0c7198af13ed6dadb10fb38630ce71b9964ea256eaf4a5
Pin SHA256: HCP9uCY/B2uBJu6MPk2JurS5Cs85A4cO3J5KQ4nuQ9M=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate

Click here to expand

Configuration
Protocols
TLS 1.3 No
TLS 1.2 Yes
TLS 1.1 Yes
TLS 1.0 Yes
SSL 3 No
SSL 2 No


Cipher Suites
# TLS 1.2 (suites in server-preferred order)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (0x6b)   DH 1024 bits   FS   WEAK 256
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (0x67)   DH 1024 bits   FS   WEAK 128
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)   WEAK 128
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 1024 bits   FS   WEAK 256
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 1024 bits   FS   WEAK 128
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
# TLS 1.1 (suites in server-preferred order)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 1024 bits   FS   WEAK 256
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 1024 bits   FS   WEAK 128
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
# TLS 1.0 (suites in server-preferred order)
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)   WEAK 112
TLS_RSA_WITH_DES_CBC_SHA (0x9)   INSECURE 56


Handshake Simulation
Android 2.3.7   No SNI 2 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.0.4 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 4.1.1 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 4.2.2 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 4.3 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 4.4.2 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Android 5.0.0 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Android 6.0 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Android 7.0 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 8.0 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 8.1 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Android 9.0 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Baidu Jan 2015 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
BingPreview Jan 2015 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Chrome 49 / XP SP3 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Chrome 69 / Win 7  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Chrome 70 / Win 10 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Chrome 80 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Firefox 31.3.0 ESR / Win 7 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Firefox 47 / Win 7  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Firefox 49 / XP SP3 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Firefox 62 / Win 7  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Firefox 73 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
Googlebot Feb 2018 RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
IE 7 / Vista RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
IE 8 / XP   No FS 1   No SNI 2 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_3DES_EDE_CBC_SHA
IE 8-10 / Win 7  R RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
IE 11 / Win 7  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
IE 11 / Win 8.1  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
IE 10 / Win Phone 8.0 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
IE 11 / Win Phone 8.1  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
IE 11 / Win Phone 8.1 Update  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
IE 11 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Edge 15 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Edge 16 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Edge 18 / Win 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Edge 13 / Win Phone 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Java 6u45   No SNI 2 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 7u25 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 8u161 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Java 11.0.3 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Java 12.0.1 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
OpenSSL 0.9.8y RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
OpenSSL 1.0.1l  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
OpenSSL 1.0.2s  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
OpenSSL 1.1.0k  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
OpenSSL 1.1.1c  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 5.1.9 / OS X 10.6.8 RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Safari 6 / iOS 6.0.1 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 6.0.4 / OS X 10.8.4  R RSA 2048 (SHA1)   TLS 1.0 TLS_RSA_WITH_AES_256_CBC_SHA  No FS
Safari 7 / iOS 7.1  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 7 / OS X 10.9  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 8 / iOS 8.4  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 8 / OS X 10.10  R RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
Safari 9 / iOS 9  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Safari 9 / OS X 10.11  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Safari 10 / iOS 10  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Safari 10 / OS X 10.12  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Safari 12.1.2 / MacOS 10.14.6 Beta  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Safari 12.1.1 / iOS 12.3.1  R RSA 2048 (SHA1)   TLS 1.2 TLS_RSA_WITH_AES_256_CBC_SHA256  No FS
Apple ATS 9 / iOS 9  R Server sent fatal alert: handshake_failure
Yahoo Slurp Jan 2015 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
YandexBot Jan 2015 RSA 2048 (SHA1)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256   DH 1024  FS
# Not simulated clients (Protocol mismatch)
IE 6 / XP   No FS 1   No SNI 2 Protocol mismatch (not simulated)

Click here to expand

(1) Clients that do not support Forward Secrecy (FS) are excluded when determining support for it.
(2) No support for virtual SSL hosting (SNI). Connects to the default site if the server uses SNI.
(3) Only first connection attempt simulated. Browsers sometimes retry with a lower protocol version.
(R) Denotes a reference browser or client, with which we expect better effective security.
(All) We use defaults, but some platforms do not use their best protocols and features (e.g., Java 6 & 7, older IE).
(All) Certificate trust is not checked in handshake simulation, we only perform TLS handshake.


Protocol Details
Renegotiation Unknown
BEAST attack Not mitigated server-side (more info)   TLS 1.0: 0x35
POODLE (SSLv3) No, SSL 3 not supported (more info)
POODLE (TLS) No (more info)
Zombie POODLE No (more info)   TLS 1.2 : 0x003c
GOLDENDOODLE No (more info)   TLS 1.2 : 0x003c
OpenSSL 0-Length No (more info)   TLS 1.2 : 0x003c
Sleeping POODLE No (more info)   TLS 1.2 : 0x003c
Downgrade attack prevention Yes, TLS_FALLBACK_SCSV supported (more info)
SSL/TLS compression No
RC4 No
Heartbeat (extension) Yes
Heartbleed (vulnerability) No (more info)
Ticketbleed (vulnerability) No (more info)
OpenSSL CCS vuln. (CVE-2014-0224) No (more info)
OpenSSL Padding Oracle vuln.
(CVE-2016-2107)		 No (more info)
ROBOT (vulnerability) No (more info)
Forward Secrecy Weak key exchange   WEAK
ALPN No
NPN No
Session resumption (caching) Yes
Session resumption (tickets) No
OCSP stapling No
Strict Transport Security (HSTS) Yes
max-age=31536000; includeSubDomains
HSTS Preloading Not in: Chrome  Edge  Firefox  IE 
Public Key Pinning (HPKP) No (more info)
Public Key Pinning Report-Only No
Public Key Pinning (Static) No (more info)
Long handshake intolerance No
TLS extension intolerance No
TLS version intolerance No
Incorrect SNI alerts No
Uses common DH primes Yes   Replace with custom DH parameters if possible (more info)
DH public server param (Ys) reuse No
ECDH public server param reuse No, ECDHE suites not supported
Supported Named Groups -
SSL 2 handshake compatibility Yes


HTTP Requests
1 https://vpn.averon.ru/  (HTTP/1.1 200 OK)
1
Content-Type text/html; charset=utf-8
Transfer-Encoding chunked
Cache-Control no-cache
Pragma no-cache
Connection Keep-Alive
Date Sun, 08 Jun 2025 15:39:05 GMT
X-Frame-Options SAMEORIGIN
Strict-Transport-Security max-age=31536000; includeSubDomains
Set-Cookie webvpn=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie webvpn_as=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie webvpnc=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie webvpn_portal=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie webvpnSharePoint=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie samlPreauthSessionHash=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie acSamlv2Token=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie acSamlv2Error=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; secure
Set-Cookie webvpnlogin=1; path=/; secure


Miscellaneous
Test date Sun, 08 Jun 2025 15:38:17 UTC
Test duration 231.179 seconds
HTTP status code 200
HTTP server signature -
Server hostname -


Why is my certificate not trusted?

There are many reasons why a certificate may not be trusted. The exact problem is indicated on the report card in bright red. The problems fall into three categories:

  1. Invalid certificate
  2. Invalid configuration
  3. Unknown Certificate Authority

1. Invalid certificate

A certificate is invalid if:

2. Invalid configuration

In some cases, the certificate chain does not contain all the necessary certificates to connect the web server certificate to one of the root certificates in our trust store. Less commonly, one of the certificates in the chain (other than the web server certificate) will have expired, and that invalidates the entire chain.

3. Unknown Certificate Authority

In order for trust to be established, we must have the root certificate of the signing Certificate Authority in our trust store. SSL Labs does not maintain its own trust store; instead we use the store maintained by Mozilla.

If we mark a web site as not trusted, that means that the average web user's browser will not trust it either. For certain special groups of users, such web sites can still be secure. For example, if you can securely verify that a self-signed web site is operated by a person you trust, then you can trust that self-signed web site too. Or, if you work for an organisation that manages its own trust, and you have their own root certificate already embedded in your browser. Such special cases do not work for the general public, however, and this is what we indicate on our report card.

4. Interoperability issues

In some rare cases trust cannot be established because of interoperability issues between our code and the code or configuration running on the server. We manually review such cases, but if you encounter such an issue please feel free to contact us. Such problems are very difficult to troubleshoot and you may be able to provide us with information that might help us determine the root cause.

SSL Report v2.4.0