SSL Report: cosacom.de (195.244.248.8)
Assessed on:  Sun, 05 Oct 2025 18:30:22 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's certificate chain is incomplete. Grade capped to B.
This site works only in browsers with SNI support.
This server supports TLS 1.3.  MORE INFO »
Certificate #1: RSA 4096 bits (SHA256withRSA)
Server Key and Certificate #1
Subject www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
Common names www.cosacom.de
Alternative names cosacom.de www.cosacom.de
Serial Number 051fc49be1c93ec8e052100db188ef838dd4
Valid from Mon, 15 Sep 2025 05:03:57 UTC
Valid until Sun, 14 Dec 2025 05:03:56 UTC (expires in 2 months and 8 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/85.crl
Revocation status Validation error
CRL ERROR: IOException occurred
DNS CAA No (more info)
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 1 (1545 bytes)
Chain issues Incomplete


Certification Paths
Path #1: Trusted
1 Sent by server www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Extra download 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 www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Extra download 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 www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Extra download 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 www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Extra download 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 www.cosacom.de
Fingerprint SHA256: f6806bd145d5ca0ba3ff8f05d7fdf852ae5f0253a37ab66444ac8e52f4b51543
Pin SHA256: /itpQyBv4BEo+CRVx1r0D4xvT7ioKvipdn9RG4GBAD8=
RSA 4096 bits (e 65537) / SHA256withRSA
CRL ERROR: IOException occurred
2 Extra download 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 2048 bits (SHA256withRSA) No SNI
Server Key and Certificate #1
Subject config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
Common names config.vtserver.de
Alternative names config.vtserver.de   MISMATCH
Serial Number 0ac59f1a908c56b7ca729232b85b486c
Valid from Thu, 04 Jan 2018 00:00:00 UTC
Valid until Sun, 03 Feb 2019 12:00:00 UTC (expired 6 years and 8 months ago)   EXPIRED
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer Thawte RSA CA 2018
AIA: http://cacerts.thawte.com/ThawteRSACA2018.crt
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency No
OCSP Must Staple No
Revocation information CRL, OCSP
CRL: http://cdp.thawte.com/ThawteRSACA2018.crl
OCSP: http://status.thawte.com
Revocation status Unchecked (only trusted certificates can be checked)
Trusted No   NOT TRUSTED
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 3 (3403 bytes)
Chain issues Contains anchor
#2
Subject Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
Valid until Sat, 06 Nov 2027 12:23:52 UTC (expires in 2 years and 1 month)
Key RSA 2048 bits (e 65537)
Issuer DigiCert Global Root CA
Signature algorithm SHA256withRSA
#3
Subject DigiCert Global Root CA   In trust store
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
Valid until Mon, 10 Nov 2031 00:00:00 UTC (expires in 6 years and 1 month)
Key RSA 2048 bits (e 65537)
Issuer DigiCert Global Root CA   Self-signed
Signature algorithm SHA1withRSA   Weak, but no impact on root certificate


Certification Paths
Path #1: Not trusted (validity check failed)
1 Sent by server config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
RSA 2048 bits (e 65537) / SHA256withRSA
Valid until: Sun, 03 Feb 2019 12:00:00 UTC
EXPIRED
2 Sent by server Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
RSA 2048 bits (e 65537) / SHA256withRSA
3 Sent by server
In trust store 		DigiCert Global Root CA   Self-signed
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (validity check failed)
1 Sent by server config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
RSA 2048 bits (e 65537) / SHA256withRSA
Valid until: Sun, 03 Feb 2019 12:00:00 UTC
EXPIRED
2 Sent by server Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
RSA 2048 bits (e 65537) / SHA256withRSA
3 Sent by server
In trust store 		DigiCert Global Root CA   Self-signed
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (validity check failed)
1 Sent by server config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
RSA 2048 bits (e 65537) / SHA256withRSA
Valid until: Sun, 03 Feb 2019 12:00:00 UTC
EXPIRED
2 Sent by server Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
RSA 2048 bits (e 65537) / SHA256withRSA
3 Sent by server
In trust store 		DigiCert Global Root CA   Self-signed
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (validity check failed)
1 Sent by server config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
RSA 2048 bits (e 65537) / SHA256withRSA
Valid until: Sun, 03 Feb 2019 12:00:00 UTC
EXPIRED
2 Sent by server Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
RSA 2048 bits (e 65537) / SHA256withRSA
3 Sent by server
In trust store 		DigiCert Global Root CA   Self-signed
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (validity check failed)
1 Sent by server config.vtserver.de
Fingerprint SHA256: 2560a0f94b0f434f08f78d17ad1e78c19bc4d4c9794780f3cb14b340f31e51ea
Pin SHA256: bb0eWVmfeB0iVYeqkQlopjPJNYyaG0z3goNuCP4BtAo=
RSA 2048 bits (e 65537) / SHA256withRSA
Valid until: Sun, 03 Feb 2019 12:00:00 UTC
EXPIRED
2 Sent by server Thawte RSA CA 2018
Fingerprint SHA256: 9a5eecee9c7d898bd81dc3bf066daf6aefb8db1c59676206d2bfdd682312c6f6
Pin SHA256: S0mHTmqv2QhJEfy5vyPVERSnyMEliJzdC8RXduOjhAs=
RSA 2048 bits (e 65537) / SHA256withRSA
3 Sent by server
In trust store 		DigiCert Global Root CA   Self-signed
Fingerprint SHA256: 4348a0e9444c78cb265e058d5e8944b4d84f9662bd26db257f8934a443c70161
Pin SHA256: r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=
RSA 2048 bits (e 65537) / SHA1withRSA
Weak or insecure signature, but no impact on root certificate

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_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
# TLS 1.2 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)   ECDH x25519 (eq. 3072 bits RSA)   FS 256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x9f)   DH 4096 bits   FS 256
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8)   ECDH x25519 (eq. 3072 bits RSA)   FS 256
TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xccaa)   DH 4096 bits   FS 256
TLS_DHE_RSA_WITH_AES_256_CCM_8 (0xc0a3)   DH 4096 bits   FS 256
TLS_DHE_RSA_WITH_AES_256_CCM (0xc09f)   DH 4096 bits   FS 256
TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 (0xc061)   ECDH x25519 (eq. 3072 bits RSA)   FS 256
TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 (0xc053)   DH 4096 bits   FS 256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)   ECDH x25519 (eq. 3072 bits RSA)   FS 128
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 (0x9e)   DH 4096 bits   FS 128
TLS_DHE_RSA_WITH_AES_128_CCM_8 (0xc0a2)   DH 4096 bits   FS 128
TLS_DHE_RSA_WITH_AES_128_CCM (0xc09e)   DH 4096 bits   FS 128
TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 (0xc060)   ECDH x25519 (eq. 3072 bits RSA)   FS 128
TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 (0xc052)   DH 4096 bits   FS 128
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (0x6b)   DH 4096 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 (0xc077)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 (0xc4)   DH 4096 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (0x67)   DH 4096 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 (0xc076)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 128
TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 (0xbe)   DH 4096 bits   FS   WEAK 128
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 4096 bits   FS   WEAK 256
TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA (0x88)   DH 4096 bits   FS   WEAK 256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK 128
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 4096 bits   FS   WEAK 128
TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA (0x45)   DH 4096 bits   FS   WEAK 128
TLS_RSA_WITH_AES_256_GCM_SHA384 (0x9d)   WEAK 256
TLS_RSA_WITH_AES_256_CCM_8 (0xc0a1)   WEAK 256
TLS_RSA_WITH_AES_256_CCM (0xc09d)   WEAK 256
TLS_RSA_WITH_ARIA_256_GCM_SHA384 (0xc051)   WEAK 256
TLS_RSA_WITH_AES_128_GCM_SHA256 (0x9c)   WEAK 128
TLS_RSA_WITH_AES_128_CCM_8 (0xc0a0)   WEAK 128
TLS_RSA_WITH_AES_128_CCM (0xc09c)   WEAK 128
TLS_RSA_WITH_ARIA_128_GCM_SHA256 (0xc050)   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)   WEAK 256
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 (0xc0)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)   WEAK 128
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 (0xba)   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x84)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x41)   WEAK 128


Handshake Simulation
Android 4.4.2 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Android 5.0.0 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 6.0 RSA 4096 (SHA256)   TLS 1.2 > http/1.1   TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 7.0 RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Android 8.0 RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
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
BingPreview Jan 2015 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Chrome 49 / XP SP3 RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Chrome 69 / Win 7  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
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 31.3.0 ESR / Win 7 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 47 / Win 7  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
Firefox 49 / XP SP3 RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Firefox 62 / Win 7  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Firefox 73 / Win 10  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Googlebot Feb 2018 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
IE 11 / Win 7  R RSA 4096 (SHA256)   TLS 1.2 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 4096  FS
IE 11 / Win 8.1  R RSA 4096 (SHA256)   TLS 1.2 > http/1.1   TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 4096  FS
IE 11 / Win Phone 8.1  R RSA 4096 (SHA256)   TLS 1.2 > http/1.1   TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256   ECDH secp256r1  FS
IE 11 / Win Phone 8.1 Update  R RSA 4096 (SHA256)   TLS 1.2 > http/1.1   TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 4096  FS
IE 11 / Win 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Edge 15 / Win 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 16 / Win 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 18 / Win 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 13 / Win Phone 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 8u161 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 11.0.3 -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 12.0.1 -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.0.1l  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.0.2s  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
OpenSSL 1.1.0k  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
OpenSSL 1.1.1c  R -   TLS 1.3 TLS_AES_256_GCM_SHA384   ECDH x25519  FS
Safari 6 / iOS 6.0.1 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 7 / iOS 7.1  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 7 / OS X 10.9  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 8 / iOS 8.4  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 8 / OS X 10.10  R RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384   ECDH secp256r1  FS
Safari 9 / iOS 9  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 9 / OS X 10.11  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / iOS 10  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Safari 10 / OS X 10.12  R RSA 4096 (SHA256)   TLS 1.2 > h2   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_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
Apple ATS 9 / iOS 9  R RSA 4096 (SHA256)   TLS 1.2 > h2   TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
Yahoo Slurp Jan 2015 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp256r1  FS
YandexBot Jan 2015 RSA 4096 (SHA256)   TLS 1.2 TLS_ECDHE_RSA_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 : 0xc027
GOLDENDOODLE No (more info)   TLS 1.2 : 0xc027
OpenSSL 0-Length No (more info)   TLS 1.2 : 0xc027
Sleeping POODLE No (more info)   TLS 1.2 : 0xc027
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 No
Session resumption (caching) Yes
Session resumption (tickets) Yes
OCSP stapling No
Strict Transport Security (HSTS) No
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
DH public server param (Ys) reuse No
ECDH public server param reuse No
Supported Named Groups x25519, secp256r1, x448, secp521r1, secp384r1 (server preferred order)
SSL 2 handshake compatibility No
0-RTT enabled No


HTTP Requests
1 https://cosacom.de/  (HTTP/1.1 200 OK)
1
Date Sun, 05 Oct 2025 18:28:15 GMT
Server Apache
Upgrade h2,h2c
Connection Upgrade, close
Last-Modified Sun, 05 Oct 2025 16:35:10 GMT
ETag "11490-6406beb17bd18"
Accept-Ranges bytes
Content-Length 70800
Vary Accept-Encoding
Referrer-Policy no-referrer-when-downgrade
Pragma public
Cache-Control max-age=3600, public
Content-Type text/html; charset=UTF-8


Miscellaneous
Test date Sun, 05 Oct 2025 18:28:05 UTC
Test duration 137.256 seconds
HTTP status code 200
HTTP server signature Apache
Server hostname web02.vtserver.de


SSL Report v2.4.1