SSL Report: kdprevent.ksw.or.at (193.16.244.153)
Assessed on:  Sun, 15 Jun 2025 01:09:38 UTC | Clear cache
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Summary
Overall Rating
B
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 supports weak Diffie-Hellman (DH) key exchange parameters. Grade capped to B.   MORE INFO »
This server does not support Forward Secrecy with the reference browsers. Grade capped to B.  MORE INFO »
This server supports TLS 1.0 and TLS 1.1. Grade capped to B. MORE INFO »
This server supports TLS 1.3.  MORE INFO »
HTTP Strict Transport Security (HSTS) with long duration deployed on this server.  MORE INFO »
Certificate #1: RSA 2048 bits (SHA256withRSA)
Server Key and Certificate #1
Subject *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
Common names *.ksw.or.at
Alternative names *.ksw.or.at ksw.or.at
Serial Number 08e5c4b48ed12afc7652f0c018214c56
Valid from Wed, 09 Oct 2024 00:00:00 UTC
Valid until Fri, 07 Nov 2025 23:59:59 UTC (expires in 4 months and 23 days)
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer Thawte TLS RSA CA G1
AIA: http://cacerts.thawte.com/ThawteTLSRSACAG1.crt
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL, OCSP
CRL: http://cdp.thawte.com/ThawteTLSRSACAG1.crl
OCSP: http://status.thawte.com
Revocation status Good (not revoked)
DNS CAA No (more info)
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2814 bytes)
Chain issues None
#2
Subject Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
Valid until Tue, 02 Nov 2027 12:24:25 UTC (expires in 2 years and 4 months)
Key RSA 2048 bits (e 65537)
Issuer DigiCert Global Root G2
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Trusted
1 Sent by server *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store DigiCert Global Root G2   Self-signed
Fingerprint SHA256: cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
Pin SHA256: i7WTqTvh0OioIruIfFR4kMPnBqrS2rdiVPl/s2uC/CY=
RSA 2048 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store DigiCert Global Root G2   Self-signed
Fingerprint SHA256: cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
Pin SHA256: i7WTqTvh0OioIruIfFR4kMPnBqrS2rdiVPl/s2uC/CY=
RSA 2048 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store DigiCert Global Root G2   Self-signed
Fingerprint SHA256: cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
Pin SHA256: i7WTqTvh0OioIruIfFR4kMPnBqrS2rdiVPl/s2uC/CY=
RSA 2048 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store DigiCert Global Root G2   Self-signed
Fingerprint SHA256: cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
Pin SHA256: i7WTqTvh0OioIruIfFR4kMPnBqrS2rdiVPl/s2uC/CY=
RSA 2048 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server *.ksw.or.at
Fingerprint SHA256: 434da80d7add9de232e708689a5b2029b2422ffd17615989777e243b4eb5ae4f
Pin SHA256: Sq6PO6dUqt706lKbTDIpuVJ8CxXIt1huUzcfuyyLg8g=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server Thawte TLS RSA CA G1
Fingerprint SHA256: 4bcc5e234fe81ede4eaf883aa19c31335b0b26e85e066b9945e4cb6153eb20c2
Pin SHA256: 42b9RNOnyb3tlC0KYtNPA3KKpJluskyU6aG+CipUmaM=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store DigiCert Global Root G2   Self-signed
Fingerprint SHA256: cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
Pin SHA256: i7WTqTvh0OioIruIfFR4kMPnBqrS2rdiVPl/s2uC/CY=
RSA 2048 bits (e 65537) / SHA256withRSA

Click here to expand

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


Cipher Suites
# TLS 1.3 (server has no preference)
TLS_AES_128_GCM_SHA256 (0x1301)   ECDH secp256r1 (eq. 3072 bits RSA)   FS 128
TLS_AES_256_GCM_SHA384 (0x1302)   ECDH secp256r1 (eq. 3072 bits RSA)   FS 256
# TLS 1.2 (server has no preference)
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 1024 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 128
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (0x67)   DH 1024 bits   FS   WEAK 128
TLS_RSA_WITH_AES_128_GCM_SHA256 (0x9c)   WEAK 128
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 (0x9e)   DH 1024 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)   ECDH secp521r1 (eq. 15360 bits RSA)   FS 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 1024 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 256
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (0x6b)   DH 1024 bits   FS   WEAK 256
TLS_RSA_WITH_AES_256_GCM_SHA384 (0x9d)   WEAK 256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x9f)   DH 1024 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)   ECDH secp521r1 (eq. 15360 bits RSA)   FS 256
# TLS 1.1 (server has no preference)
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 1024 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 1024 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 256
# TLS 1.0 (server has no preference)
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 1024 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 1024 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH secp521r1 (eq. 15360 bits RSA)   FS   WEAK 256


Handshake Simulation
Android 2.3.7   No SNI 2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Android 4.0.4 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Android 4.1.1 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp521r1  FS
Android 4.2.2 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp521r1  FS
Android 4.3 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp521r1  FS
Android 4.4.2 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Android 5.0.0 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp521r1  FS
Android 6.0 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 7.0 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 8.0 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 8.1 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 9.0 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Baidu Jan 2015 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
BingPreview Jan 2015 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Chrome 49 / XP SP3 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Chrome 69 / Win 7  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Chrome 70 / Win 10 -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Chrome 80 / Win 10  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 31.3.0 ESR / Win 7 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 47 / Win 7  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 49 / XP SP3 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 62 / Win 7  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 73 / Win 10  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Googlebot Feb 2018 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
IE 7 / Vista RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 8 / XP   No FS 1   No SNI 2 Server sent fatal alert: handshake_failure
IE 8-10 / Win 7  R RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
IE 11 / Win 7  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
IE 11 / Win 8.1  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
IE 10 / Win Phone 8.0 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
IE 11 / Win Phone 8.1  R RSA 2048 (SHA256)   TLS 1.2 TLS_RSA_WITH_AES_128_CBC_SHA256  No FS
IE 11 / Win Phone 8.1 Update  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
IE 11 / Win 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 15 / Win 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 16 / Win 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 18 / Win 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 13 / Win Phone 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 6u45   No SNI 2 RSA 2048 (SHA256)   TLS 1.0 TLS_RSA_WITH_AES_128_CBC_SHA  No FS
Java 7u25 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Java 8u161 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  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 0.9.8y RSA 2048 (SHA256)   TLS 1.0 TLS_DHE_RSA_WITH_AES_256_CBC_SHA   DH 1024  FS
OpenSSL 1.0.1l  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
OpenSSL 1.0.2s  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.1.0k  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.1.1c  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 5.1.9 / OS X 10.6.8 RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 6 / iOS 6.0.1 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 6.0.4 / OS X 10.8.4  R RSA 2048 (SHA256)   TLS 1.0 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 7 / iOS 7.1  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 7 / OS X 10.9  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 8 / iOS 8.4  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 8 / OS X 10.10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 9 / iOS 9  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 9 / OS X 10.11  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / iOS 10  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / OS X 10.12  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 12.1.2 / MacOS 10.14.6 Beta  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Safari 12.1.1 / iOS 12.3.1  R -   TLS 1.3 TLS_AES_128_GCM_SHA256   ECDH secp256r1  FS
Apple ATS 9 / iOS 9  R RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Yahoo Slurp Jan 2015 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp384r1  FS
YandexBot Jan 2015 RSA 2048 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  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
Secure Renegotiation Supported
Secure Client-Initiated Renegotiation Yes
Insecure Client-Initiated Renegotiation No
BEAST attack Not mitigated server-side (more info)   TLS 1.0: 0x2f
POODLE (SSLv3) No, SSL 3 not supported (more info)
POODLE (TLS) No (more info)
Zombie POODLE No (more info)   TLS 1.2 : 0x002f
GOLDENDOODLE No (more info)   TLS 1.2 : 0x002f
OpenSSL 0-Length No (more info)   TLS 1.2 : 0x002f
Sleeping POODLE No (more info)   TLS 1.2 : 0x002f
Downgrade attack prevention No, TLS_FALLBACK_SCSV not supported (more info)
SSL/TLS compression No
RC4 No
Heartbeat (extension) No
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) No (IDs assigned but not accepted)
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
Supported Named Groups secp256r1, secp384r1, secp521r1 (Server has no preference)
SSL 2 handshake compatibility Yes
0-RTT enabled No


HTTP Requests
1 https://kdprevent.ksw.or.at/  (HTTP/1.1 200 OK)
1
X-XSS-Protection 1; mode=block
Accept-Ranges bytes
Date Sun, 15 Jun 2025 01:07:05 GMT
Connection close
Last-Modified Thu, 16 May 2024 10:13:34 GMT
X-Robots-Tag noindex, nofollow
Strict-Transport-Security max-age=31536000; includeSubDomains
X-Content-Type-Options nosniff
Content-Length 262
Content-Type text/html


Miscellaneous
Test date Sun, 15 Jun 2025 01:06:51 UTC
Test duration 167.121 seconds
HTTP status code 200
HTTP server signature -
Server hostname -


SSL Report v2.4.0