SSL Report: umfrage.uni-leipzig.de (139.18.17.42)
Assessed on:  Mon, 12 Jan 2026 03:51:10 UTC | Clear cache
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Summary
Overall Rating
A+
0
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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 by Java trust store (see below for details).
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 »
Certificate #1: EC 256 bits (SHA384withECDSA)
Server Key and Certificate #1
Subject umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
Common names umfrage.uni-leipzig.de
Alternative names umfrage.uni-leipzig.de
Serial Number 570f7298a91cd56a5b5e82229ba6fee9
Valid from Tue, 11 Nov 2025 11:09:12 UTC
Valid until Wed, 11 Nov 2026 11:09:12 UTC (expires in 9 months and 30 days)
Key EC 256 bits
Weak key (Debian) No
Issuer GEANT TLS ECC 1
AIA: http://crt.harica.gr/HARICA-GEANT-TLS-E1.cer
Signature algorithm SHA384withECDSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL, OCSP
CRL: http://crl.harica.gr/HARICA-GEANT-TLS-E1.crl
OCSP: http://ocsp-tls.harica.gr
Revocation status Good (not revoked)
CRL ERROR: IOException occurred
DNS CAA No (more info)
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 3 (2666 bytes)
Chain issues Contains anchor
#2
Subject GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
Valid until Sat, 31 Dec 2039 11:14:20 UTC (expires in 13 years and 11 months)
Key EC 384 bits
Issuer HARICA TLS ECC Root CA 2021
Signature algorithm SHA384withECDSA
#3
Subject HARICA TLS ECC Root CA 2021   In trust store
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
Valid until Mon, 13 Feb 2045 11:01:09 UTC (expires in 19 years and 1 month)
Key EC 384 bits
Issuer HARICA TLS ECC Root CA 2021   Self-signed
Signature algorithm SHA384withECDSA


Certification Paths
Path #1: Trusted
1 Sent by server umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
EC 256 bits / SHA384withECDSA
CRL ERROR: IOException occurred
2 Sent by server GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
EC 384 bits / SHA384withECDSA
CRL ERROR: IOException occurred
3 Sent by server
In trust store 		HARICA TLS ECC Root CA 2021   Self-signed
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
EC 384 bits / SHA384withECDSA
Path #1: Trusted
1 Sent by server umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
EC 256 bits / SHA384withECDSA
CRL ERROR: IOException occurred
2 Sent by server GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
EC 384 bits / SHA384withECDSA
CRL ERROR: IOException occurred
3 Sent by server
In trust store 		HARICA TLS ECC Root CA 2021   Self-signed
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
EC 384 bits / SHA384withECDSA
Path #1: Trusted
1 Sent by server umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
EC 256 bits / SHA384withECDSA
CRL ERROR: IOException occurred
2 Sent by server GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
EC 384 bits / SHA384withECDSA
CRL ERROR: IOException occurred
3 Sent by server
In trust store 		HARICA TLS ECC Root CA 2021   Self-signed
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
EC 384 bits / SHA384withECDSA
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
EC 256 bits / SHA384withECDSA
CRL ERROR: IOException occurred
2 Sent by server GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
EC 384 bits / SHA384withECDSA
CRL ERROR: IOException occurred
3 Sent by server
  Not in trust store 		HARICA TLS ECC Root CA 2021   Self-signed
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
EC 384 bits / SHA384withECDSA
Path #1: Trusted
1 Sent by server umfrage.uni-leipzig.de
Fingerprint SHA256: 84c4cedffc361ac62736fc5680023f5d685cd8bd62c545e7829c26af414b86e1
Pin SHA256: l0fo8xTlqxefNe4g5MzP+TMEy93c9S8cBiGI+T5IhUw=
EC 256 bits / SHA384withECDSA
CRL ERROR: IOException occurred
2 Sent by server GEANT TLS ECC 1
Fingerprint SHA256: 6cdf0ba1711e856d228ba00ca04c5c1c3d79944c037b713b155a4ee4b47ec53c
Pin SHA256: ejFKBydz15Z1N1P+b5wA1BLK28O3vLnf7cUQW4rq3+o=
EC 384 bits / SHA384withECDSA
CRL ERROR: IOException occurred
3 Sent by server
In trust store 		HARICA TLS ECC Root CA 2021   Self-signed
Fingerprint SHA256: 3f99cc474acfce4dfed58794665e478d1547739f2e780f1bb4ca9b133097d401
Pin SHA256: /HhDAOyN9NPRutdjg1GCkY1Sqf8COL32laHNm9uYMhw=
EC 384 bits / SHA384withECDSA

Click here to expand

Certificate #2: EC 256 bits (SHA256withECDSA) No SNI
Server Key and Certificate #1
Subject Universitaet Leipzig / Universitaetsrechenzentrum
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
Common names -
Alternative names -   INVALID
Serial Number 00e6deb6f213b1cc27
Valid from Tue, 06 Nov 2018 09:56:19 UTC
Valid until Fri, 03 Nov 2028 09:56:19 UTC (expires in 2 years and 9 months)
Key EC 256 bits
Weak key (Debian) No
Issuer Universitaet Leipzig   Self-signed
Signature algorithm SHA256withECDSA
Extended Validation No
Certificate Transparency No
OCSP Must Staple No
Revocation information None
Trusted No   NOT TRUSTED
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 1 (477 bytes)
Chain issues None


Certification Paths
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server
  Not in trust store 		Universitaet Leipzig / Universitaetsrechenzentrum   Self-signed
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
EC 256 bits / SHA256withECDSA
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server
  Not in trust store 		Universitaet Leipzig / Universitaetsrechenzentrum   Self-signed
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
EC 256 bits / SHA256withECDSA
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server
  Not in trust store 		Universitaet Leipzig / Universitaetsrechenzentrum   Self-signed
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
EC 256 bits / SHA256withECDSA
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server
  Not in trust store 		Universitaet Leipzig / Universitaetsrechenzentrum   Self-signed
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
EC 256 bits / SHA256withECDSA
Path #1: Not trusted (path does not chain to a trusted anchor)
1 Sent by server
  Not in trust store 		Universitaet Leipzig / Universitaetsrechenzentrum   Self-signed
Fingerprint SHA256: aa2e84004717b9b15be23c315ce47d3b841e01bbdbf4cc12a10dbfb851436747
Pin SHA256: 4CzbeGgxjzDiXIhrnR+lVoPhLbKppsDzBYKvz291hT8=
EC 256 bits / SHA256withECDSA

Click here to expand

Click here to expand

Configuration
Protocols
TLS 1.3 Yes
TLS 1.2 Yes*
TLS 1.1 No
TLS 1.0 No
SSL 3 No
SSL 2 No
(*) Experimental: Server negotiated using No-SNI


Cipher Suites
# TLS 1.3 (suites in server-preferred order)
TLS_CHACHA20_POLY1305_SHA256 (0x1303)   ECDH secp256r1 (eq. 3072 bits RSA)   FS 256
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 (suites in server-preferred order)
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)   ECDH secp256r1 (eq. 3072 bits RSA)   FS 256
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)   ECDH secp256r1 (eq. 3072 bits RSA)   FS 128
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 128
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (0xc024)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)   ECDH secp256r1 (eq. 3072 bits RSA)   FS   WEAK 128


Handshake Simulation
Android 4.4.2 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Android 5.0.0 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 6.0 EC 256 (SHA384)   TLS 1.2 > http/1.1   TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 7.0 EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Android 8.0 EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Android 8.1 -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Android 9.0 -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
BingPreview Jan 2015 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Chrome 49 / XP SP3 Server sent fatal alert: handshake_failure
Chrome 69 / Win 7  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Chrome 70 / Win 10 -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Chrome 80 / Win 10  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Firefox 31.3.0 ESR / Win 7 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 47 / Win 7  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 49 / XP SP3 EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Firefox 62 / Win 7  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Firefox 73 / Win 10  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Googlebot Feb 2018 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
IE 11 / Win 7  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
IE 11 / Win 8.1  R EC 256 (SHA384)   TLS 1.2 > http/1.1   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
IE 11 / Win Phone 8.1  R EC 256 (SHA384)   TLS 1.2 > http/1.1   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
IE 11 / Win Phone 8.1 Update  R EC 256 (SHA384)   TLS 1.2 > http/1.1   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
IE 11 / Win 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 15 / Win 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 16 / Win 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 18 / Win 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 13 / Win Phone 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 8u161 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_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_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
OpenSSL 1.0.1l  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.0.2s  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.1.0k  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.1.1c  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Safari 6 / iOS 6.0.1 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 7 / iOS 7.1  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 7 / OS X 10.9  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 8 / iOS 8.4  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 8 / OS X 10.10  R EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA   ECDH secp256r1  FS
Safari 9 / iOS 9  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 9 / OS X 10.11  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / iOS 10  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / OS X 10.12  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 12.1.2 / MacOS 10.14.6 Beta  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Safari 12.1.1 / iOS 12.3.1  R -   TLS 1.3 TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Apple ATS 9 / iOS 9  R EC 256 (SHA384)   TLS 1.2 > h2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Yahoo Slurp Jan 2015 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
YandexBot Jan 2015 EC 256 (SHA384)   TLS 1.2 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  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)
Baidu Jan 2015 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 10 / Win Phone 8.0 Protocol mismatch (not simulated)
Java 6u45   No SNI 2 Protocol mismatch (not simulated)
Java 7u25 Protocol mismatch (not simulated)
OpenSSL 0.9.8y Protocol mismatch (not simulated)
Safari 5.1.9 / OS X 10.6.8 Protocol mismatch (not simulated)
Safari 6.0.4 / OS X 10.8.4  R 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 No
Insecure Client-Initiated Renegotiation No
BEAST attack Mitigated server-side (more info)  
POODLE (SSLv3) No, SSL 3 not supported (more info)
POODLE (TLS) No (more info)
Zombie POODLE No (more info)   TLS 1.2 : 0xc00a
GOLDENDOODLE No (more info)   TLS 1.2 : 0xc00a
OpenSSL 0-Length No (more info)   TLS 1.2 : 0xc00a
Sleeping POODLE No (more info)   TLS 1.2 : 0xc00a
Downgrade attack prevention Yes, TLS_FALLBACK_SCSV 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 Yes (with most browsers)   ROBUST (more info)
ALPN Yes   h2 http/1.1
NPN Yes   h2 http/1.1
Session resumption (caching) No (IDs assigned but not accepted)
Session resumption (tickets) Yes
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)
Long handshake intolerance No
TLS extension intolerance No
TLS version intolerance No
Incorrect SNI alerts No
Uses common DH primes No, DHE suites not supported
DH public server param (Ys) reuse No, DHE suites not supported
ECDH public server param reuse No
Supported Named Groups secp256r1
SSL 2 handshake compatibility No
0-RTT enabled No


HTTP Requests
1 https://umfrage.uni-leipzig.de/  (HTTP/1.1 200 OK)
1
Content-Type text/html; charset=UTF-8
Transfer-Encoding chunked
Connection close
Date Mon, 12 Jan 2026 03:50:08 GMT
Server Apache
Expires Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control no-store, no-cache, must-revalidate
Pragma no-cache
Set-Cookie PHPSESSID=63qqs58895akd4vs9kdj4m868u; path=/; secure; HttpOnly
Strict-Transport-Security max-age=15768000
X-Content-Type-Options nosniff
X-XSS-Protection 1; mode=block


Miscellaneous
Test date Mon, 12 Jan 2026 03:49:54 UTC
Test duration 75.539 seconds
HTTP status code 200
HTTP server signature Apache
Server hostname service.rz.uni-leipzig.de


SSL Report v2.4.1