SSL Report: zellerer.net (85.214.95.211)
Assessed on:  Mon, 19 Jan 2026 00:57:56 UTC | Clear cache

Due to a recently discovered bug in Apple's code, your browser is exposed to MITM attacks. Click here for more information.

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 2048 bits (SHA256withRSA)
Server Key and Certificate #1
Subject zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=
Common names zellerer.net
Alternative names webmail.zellerer.net www.zellerer.net zellerer.net
Serial Number 05c1e988f15c9e8db1dcff67749cbf0a3495
Valid from Fri, 16 Jan 2026 20:36:00 UTC
Valid until Thu, 16 Apr 2026 20:35:59 UTC (expires in 2 months and 28 days)
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer R13
AIA: http://r13.i.lencr.org/
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL
CRL: http://r13.c.lencr.org/22.crl
Revocation status Good (not revoked)
DNS CAA Yes
policy host: zellerer.net
iodef: mailto:dmarcreports@zellerer.net flags:0
issue: letsencrypt.org flags:0
issuewild: ; flags:0
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2609 bytes)
Chain issues None
#2
Subject R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
Valid until Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year and 1 month)
Key RSA 2048 bits (e 65537)
Issuer ISRG Root X1
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Trusted
1 Sent by server zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=

RSA 2048 bits (e 65537) / SHA256withRSA
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 zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=

RSA 2048 bits (e 65537) / SHA256withRSA
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 zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=

RSA 2048 bits (e 65537) / SHA256withRSA
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 zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=

RSA 2048 bits (e 65537) / SHA256withRSA
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 zellerer.net
Fingerprint SHA256: 78f59501668e786342a690fcc2b78f3f507aebe06fbdf232c7970aee98bffb21
Pin SHA256: 5zkaLCyP2kioOGJFZArrYEvwUrpQcpeP9JoVzP6PR0c=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=

RSA 2048 bits (e 65537) / SHA256withRSA
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 2048 bits (SHA256withRSA)
Server Key and Certificate #1
Subject server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=
Common names server5.zellerer.net
Alternative names server5.zellerer.net   MISMATCH
Serial Number 06a8df7148863baed1e5a1b39cf11f9f85b2
Valid from Mon, 24 Nov 2025 07:35:43 UTC
Valid until Sun, 22 Feb 2026 07:35:42 UTC (expires in 1 month and 3 days)
Key RSA 2048 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/51.crl
Revocation status Good (not revoked)
Trusted No   NOT TRUSTED
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2577 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 1 month)
Key RSA 2048 bits (e 65537)
Issuer ISRG Root X1
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Not trusted (invalid certificate [Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9])
1 Sent by server server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=

RSA 2048 bits (e 65537) / SHA256withRSA
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: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9])
1 Sent by server server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=

RSA 2048 bits (e 65537) / SHA256withRSA
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: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9])
1 Sent by server server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=

RSA 2048 bits (e 65537) / SHA256withRSA
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: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9])
1 Sent by server server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=

RSA 2048 bits (e 65537) / SHA256withRSA
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: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9])
1 Sent by server server5.zellerer.net
Fingerprint SHA256: bd4b72fb3969ae3ed8adfd9f84576835cf997543d9662eed2dee236dddf338f9
Pin SHA256: NrFNd4HcwpKTOyQOjJ18BM1zWSsuPjk4rF+JcoOvle8=

RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R12
Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec
Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=

RSA 2048 bits (e 65537) / SHA256withRSA
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 (server has no preference)
TLS_AES_128_GCM_SHA256 (0x1301)   ECDH x25519 (eq. 3072 bits RSA)   FS 128
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


Handshake Simulation
Android 8.1 -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Android 9.0 -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Chrome 69 / Win 7  R Server sent fatal alert: protocol_version
Chrome 70 / Win 10 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH x25519  FS
Chrome 80 / Win 10  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH x25519  FS
Firefox 62 / Win 7  R Server sent fatal alert: protocol_version
Firefox 73 / Win 10  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH x25519  FS
Java 11.0.3 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Java 12.0.1 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
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_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Safari 12.1.1 / iOS 12.3.1  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   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   http/1.1
Session resumption (tickets) No
OCSP stapling No
Strict Transport Security (HSTS) Yes
max-age=15768000
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, secp256r1, secp384r1, secp521r1 (server preferred order)
SSL 2 handshake compatibility No
0-RTT enabled No


HTTP Requests
1 https://zellerer.net/  (HTTP/1.1 200 OK)
1
Server nginx
Date Mon, 19 Jan 2026 00:57:35 GMT
Content-Type text/html
Content-Length 2945
Last-Modified Tue, 13 Feb 2024 23:07:45 GMT
Connection close
ETag "65cbf641-b81"
X-Cache-Status MISS
Strict-Transport-Security max-age=15768000
X-Powered-By PleskLin
X-Frame-Options SAMEORIGIN
Referrer-Policy no-referrer
X-Content-Type-Options nosniff
Permissions-Policy autoplay=(self)
Permissions-Policy camera=()
Permissions-Policy fullscreen=(self)
Permissions-Policy geolocation=()
Permissions-Policy microphone=()
Permissions-Policy payment=()
Content-Security-Policy default-src https://zellerer.net:*
Accept-Ranges bytes


Miscellaneous
Test date Mon, 19 Jan 2026 00:57:26 UTC
Test duration 29.613 seconds
HTTP status code 200
HTTP server signature nginx
Server hostname server5.zellerer.net


SSL Report v2.4.1