SSL Report: chat.thomasdalichow.de (136.243.11.239)
Assessed on:  Sun, 23 Nov 2025 21:09:17 UTC | Clear cache
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Summary
Overall Rating
A
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 site works only in browsers with SNI support.
This server supports TLS 1.3.  MORE INFO »
HTTP Strict Transport Security (HSTS) with long duration deployed on this server.  MORE INFO »
DNS Certification Authority Authorization (CAA) Policy found for this domain.  MORE INFO »
Certificate #1: RSA 4096 bits (SHA256withRSA)
Server Key and Certificate #1
Subject chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
Common names chat.thomasdalichow.de
Alternative names chat.thomasdalichow.de
Serial Number 06fd32e97cbdb2704c3ad99a1556b754cf78
Valid from Mon, 20 Oct 2025 21:01:40 UTC
Valid until Sun, 18 Jan 2026 21:01:39 UTC (expires in 1 month and 25 days)
Key RSA 4096 bits (e 65537)
Weak key (Debian) No
Issuer R12
AIA: http://r12.i.lencr.org/
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL
CRL: http://r12.c.lencr.org/121.crl
Revocation status Validation error
CRL ERROR: IOException occurred
DNS CAA Yes
policy host: thomasdalichow.de
issue: letsencrypt.org flags:0
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2838 bytes)
Chain issues None
#2
Subject R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
Valid until Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year and 3 months)
Key RSA 2048 bits (e 65537)
Issuer ISRG Root X1
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Trusted
1 Sent by server chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server chat.thomasdalichow.de
Fingerprint SHA256: 216c974485168f197c0c09c223151ee258356207d4283b9300814a680c783cf9
Pin SHA256: haE5cos9iLKf0J/9Vssy4xRKqAg60A2Inh7wCIwuBG4=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA

Click here to expand

Certificate #2: RSA 4096 bits (SHA256withRSA) No SNI
Server Key and Certificate #1
Subject ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
Common names ct1.alpha.thomasdalichow.de
Alternative names ct1.alpha.thomasdalichow.de   MISMATCH
Serial Number 066cdd949bef2192058dea65339f998030db
Valid from Mon, 20 Oct 2025 21:01:47 UTC
Valid until Sun, 18 Jan 2026 21:01:46 UTC (expires in 1 month and 25 days)
Key RSA 4096 bits (e 65537)
Weak key (Debian) No
Issuer R12
AIA: http://r12.i.lencr.org/
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL
CRL: http://r12.c.lencr.org/92.crl
Revocation status Validation error
CRL ERROR: IOException occurred
Trusted No   NOT TRUSTED
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2847 bytes)
Chain issues None
#2
Subject R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
Valid until Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year and 3 months)
Key RSA 2048 bits (e 65537)
Issuer ISRG Root X1
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316])
1 Sent by server ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316])
1 Sent by server ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316])
1 Sent by server ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316])
1 Sent by server ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316])
1 Sent by server ct1.alpha.thomasdalichow.de
Fingerprint SHA256: 173fe18ca24613457a0695f35d47aeb06452824503e4c79e5818252cda29b316
Pin SHA256: 1NEOKvIBA8+sUfZY9Tx2+LX/BVFRWxc4ydQYCq7YQT0=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
RSA 2048 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA

Click here to expand

Click here to expand

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


Cipher Suites
# TLS 1.3 (suites in server-preferred order)
TLS_AES_256_GCM_SHA384 (0x1302)   ECDH x25519 (eq. 3072 bits RSA)   FS 256
TLS_CHACHA20_POLY1305_SHA256 (0x1303)   ECDH x25519 (eq. 3072 bits RSA)   FS 256
TLS_AES_128_GCM_SHA256 (0x1301)   ECDH x25519 (eq. 3072 bits RSA)   FS 128


Handshake Simulation
Android 8.1 -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Android 9.0 -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Chrome 69 / Win 7  R Server sent fatal alert: protocol_version
Chrome 70 / Win 10 -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Chrome 80 / Win 10  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Firefox 62 / Win 7  R Server sent fatal alert: protocol_version
Firefox 73 / Win 10  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Java 11.0.3 Server sent fatal alert: handshake_failure
Java 12.0.1 Server sent fatal alert: handshake_failure
OpenSSL 1.1.0k  R Server sent fatal alert: protocol_version
OpenSSL 1.1.1c  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Safari 12.1.2 / MacOS 10.14.6 Beta  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Safari 12.1.1 / iOS 12.3.1  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
# Not simulated clients (Protocol mismatch)
Android 2.3.7   No SNI 2 Protocol mismatch (not simulated)
Android 4.0.4 Protocol mismatch (not simulated)
Android 4.1.1 Protocol mismatch (not simulated)
Android 4.2.2 Protocol mismatch (not simulated)
Android 4.3 Protocol mismatch (not simulated)
Android 4.4.2 Protocol mismatch (not simulated)
Android 5.0.0 Protocol mismatch (not simulated)
Android 6.0 Protocol mismatch (not simulated)
Android 7.0 Protocol mismatch (not simulated)
Android 8.0 Protocol mismatch (not simulated)
Baidu Jan 2015 Protocol mismatch (not simulated)
BingPreview Jan 2015 Protocol mismatch (not simulated)
Chrome 49 / XP SP3 Protocol mismatch (not simulated)
Firefox 31.3.0 ESR / Win 7 Protocol mismatch (not simulated)
Firefox 47 / Win 7  R Protocol mismatch (not simulated)
Firefox 49 / XP SP3 Protocol mismatch (not simulated)
Googlebot Feb 2018 Protocol mismatch (not simulated)
IE 6 / XP   No FS 1   No SNI 2 Protocol mismatch (not simulated)
IE 7 / Vista Protocol mismatch (not simulated)
IE 8 / XP   No FS 1   No SNI 2 Protocol mismatch (not simulated)
IE 8-10 / Win 7  R Protocol mismatch (not simulated)
IE 11 / Win 7  R Protocol mismatch (not simulated)
IE 11 / Win 8.1  R Protocol mismatch (not simulated)
IE 10 / Win Phone 8.0 Protocol mismatch (not simulated)
IE 11 / Win Phone 8.1  R Protocol mismatch (not simulated)
IE 11 / Win Phone 8.1 Update  R Protocol mismatch (not simulated)
IE 11 / Win 10  R Protocol mismatch (not simulated)
Edge 15 / Win 10  R Protocol mismatch (not simulated)
Edge 16 / Win 10  R Protocol mismatch (not simulated)
Edge 18 / Win 10  R Protocol mismatch (not simulated)
Edge 13 / Win Phone 10  R Protocol mismatch (not simulated)
Java 6u45   No SNI 2 Protocol mismatch (not simulated)
Java 7u25 Protocol mismatch (not simulated)
Java 8u161 Protocol mismatch (not simulated)
OpenSSL 0.9.8y Protocol mismatch (not simulated)
OpenSSL 1.0.1l  R Protocol mismatch (not simulated)
OpenSSL 1.0.2s  R Protocol mismatch (not simulated)
Safari 5.1.9 / OS X 10.6.8 Protocol mismatch (not simulated)
Safari 6 / iOS 6.0.1 Protocol mismatch (not simulated)
Safari 6.0.4 / OS X 10.8.4  R Protocol mismatch (not simulated)
Safari 7 / iOS 7.1  R Protocol mismatch (not simulated)
Safari 7 / OS X 10.9  R Protocol mismatch (not simulated)
Safari 8 / iOS 8.4  R Protocol mismatch (not simulated)
Safari 8 / OS X 10.10  R Protocol mismatch (not simulated)
Safari 9 / iOS 9  R Protocol mismatch (not simulated)
Safari 9 / OS X 10.11  R Protocol mismatch (not simulated)
Safari 10 / iOS 10  R Protocol mismatch (not simulated)
Safari 10 / OS X 10.12  R Protocol mismatch (not simulated)
Apple ATS 9 / iOS 9  R Protocol mismatch (not simulated)
Yahoo Slurp Jan 2015 Protocol mismatch (not simulated)
YandexBot Jan 2015 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
ROBOT (vulnerability) No (more info)
Forward Secrecy Yes (with most browsers)   ROBUST (more info)
ALPN Yes   h2 http/1.1
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)
Supported Named Groups x25519
SSL 2 handshake compatibility No
0-RTT enabled No


HTTP Requests
1 https://chat.thomasdalichow.de/  (HTTP/1.1 200 OK)
1
Date Sun, 23 Nov 2025 21:09:07 GMT
Server Apache
Strict-Transport-Security max-age=31536000; includeSubDomains
X-Xss-Protection 1; mode=block
Referrer-Policy no-referrer
Cache-Control no-cache, max-age=31556926, public
Content-Security-Policy frame-ancestors 'self';
Content-Type text/html
Permissions-Policy
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Ratelimit-Limit 101
X-Ratelimit-Remaining 100
X-Ratelimit-Reset 1
X-Request-Id suqmb8ibotrrjcpup4dapuzs5o
Connection close
Transfer-Encoding chunked


Miscellaneous
Test date Sun, 23 Nov 2025 21:08:58 UTC
Test duration 18.673 seconds
HTTP status code 200
HTTP server signature Apache
Server hostname ct1.alpha.thomasdalichow.de


SSL Report v2.4.1