SSL Server Test: help.post.ch (Powered by Qualys SSL Labs)

SSL Report: help.post.ch (76.76.21.21)

Assessed on: Fri, 18 Jul 2025 07:16:41 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+

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	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ=
Common names	help.post.ch
Alternative names	help.post.ch
Serial Number	21ded2ba7ad43f4a685f3d2fe4bac8601f194ad0
Valid from	Thu, 12 Sep 2024 11:58:27 UTC
Valid until	Fri, 12 Sep 2025 11:58:27 UTC (expires in 1 month and 24 days)
Key	RSA 4096 bits (e 65537)
Weak key (Debian)	No
Issuer	SwissSign RSA TLS OV ICA 2022 - 1 AIA: http://aia.swisssign.ch/air-0f2bf9a5-dd37-48c9-a85b-12acdcb8be45
Signature algorithm	SHA256withRSA
Extended Validation	No
Certificate Transparency	Yes (certificate)
OCSP Must Staple	No
Revocation information	CRL, OCSP CRL: http://crl.swisssign.ch/cdp-96b62f5a-6b73-4da4-87f7-ce4002c1cd34 OCSP: http://ocsp.swisssign.ch/sign/ocs-aaccced5-66e8-4069-9b1b-fd29ab73efec
Revocation status	Good (not revoked) CRL ERROR: IOException occurred
DNS CAA	Yes policy host: post.ch iodef: mailto:dns-caa-admin@post.ch flags:0 issue: letsencrypt.org flags:0 issue: swisssign.com flags:0 issue: globalsign.com flags:0
Trusted	Yes Mozilla Apple Android Java Windows

Additional Certificates (if supplied)
Certificates provided	4 (7174 bytes)
Chain issues	Contains anchor
#2
Subject	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y=
Valid until	Sun, 29 Jun 2036 09:34:30 UTC (expires in 10 years and 11 months)
Key	RSA 4096 bits (e 65537)
Issuer	SwissSign RSA TLS Root CA 2022 - 1
Signature algorithm	SHA256withRSA
#3
Subject	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8=
Valid until	Mon, 22 Sep 2036 11:27:11 UTC (expires in 11 years and 2 months)
Key	RSA 4096 bits (e 65537)
Issuer	SwissSign Gold CA - G2
Signature algorithm	SHA256withRSA
#4
Subject	SwissSign Gold CA - G2 In trust store Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ=
Valid until	Sat, 25 Oct 2036 08:30:35 UTC (expires in 11 years and 3 months)
Key	RSA 4096 bits (e 65537)
Issuer	SwissSign Gold CA - G2 Self-signed
Signature algorithm	SHA1withRSA Weak, but no impact on root certificate

Certification Paths


Path #1: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	Sent by server	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
4	Sent by server In trust store	SwissSign Gold CA - G2 Self-signed Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	Sent by server	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
4	Sent by server In trust store	SwissSign Gold CA - G2 Self-signed Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	Sent by server	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
4	Sent by server In trust store	SwissSign Gold CA - G2 Self-signed Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	Sent by server	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
4	Sent by server In trust store	SwissSign Gold CA - G2 Self-signed Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	In trust store	SwissSign RSA TLS Root CA 2022 - 1 Self-signed Fingerprint SHA256: 193144f431e0fddb740717d4de926a571133884b4360d30e272913cbe660ce41 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA
Path #2: Trusted
1	Sent by server	help.post.ch Fingerprint SHA256: ce1b7f85611073471673e6f3a7c8fb3972da3cf21a22eadada1aba2cb00656d5 Pin SHA256: +jJ9UN5CAD82n6ScxSblLKpEwOzPqiHgWU4U1+RDoMQ= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	SwissSign RSA TLS OV ICA 2022 - 1 Fingerprint SHA256: 332f9eae3650c77454af14fe1a621a2498fd128773662890a0d12835b3436e23 Pin SHA256: 9iu6Ey595ED5KLMW1A3NSMf/Sfn9rdgavrL9DSHwZ8Y= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
3	Sent by server	SwissSign RSA TLS Root CA 2022 - 1 Fingerprint SHA256: 288b4a9f605b09b999b215850825c81f9b537dbaf23664aca98bf6ba98edc379 Pin SHA256: 68l4rg3Z5YItaxllJZb2IMk9fK76lSGRywUKYyypAF8= RSA 4096 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
4	Sent by server In trust store	SwissSign Gold CA - G2 Self-signed Fingerprint SHA256: 62dd0be9b9f50a163ea0f8e75c053b1eca57ea55c8688f647c6881f2c8357b95 Pin SHA256: QPz8KIddzL/ry99s10MzEtpjxO/PO9extQXCICCuAnQ= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate

Click here to expand

Certificate #2: RSA 2048 bits (SHA256withRSA) No SNI

Server Key and Certificate #1
Subject	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA=
Common names	no-sni.vercel-infra.com
Alternative names	no-sni.vercel-infra.com MISMATCH
Serial Number	0626bb1bc7465d3ca453d08acfffcd861b9f
Valid from	Sun, 18 May 2025 12:16:04 UTC
Valid until	Sat, 16 Aug 2025 12:16:03 UTC (expires in 28 days, 23 hours)
Key	RSA 2048 bits (e 65537)
Weak key (Debian)	No
Issuer	R10 AIA: http://r10.i.lencr.org/
Signature algorithm	SHA256withRSA
Extended Validation	No
Certificate Transparency	Yes (certificate)
OCSP Must Staple	No
Revocation information	CRL CRL: http://r10.c.lencr.org/32.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 (2582 bytes)
Chain issues	None
#2
Subject	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo=
Valid until	Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year and 7 months)
Key	RSA 2048 bits (e 65537)
Issuer	ISRG Root X1
Signature algorithm	SHA256withRSA

Certification Paths


Path #1: Not trusted (invalid certificate [Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a])
1	Sent by server	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA= RSA 2048 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo= 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: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a])
1	Sent by server	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA= RSA 2048 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo= 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: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a])
1	Sent by server	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA= RSA 2048 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo= 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: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a])
1	Sent by server	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA= RSA 2048 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo= 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: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a])
1	Sent by server	no-sni.vercel-infra.com Fingerprint SHA256: 2a9d01aad6d6ae85c862e5de06450e176d405b25367fd4aa5e5167af86b2873a Pin SHA256: 3F06JNiSjdlStP+uUtbjP6b4N/t/nCddqfugw6PaQEA= RSA 2048 bits (e 65537) / SHA256withRSA CRL ERROR: IOException occurred
2	Sent by server	R10 Fingerprint SHA256: 9d7c3f1aa6ad2b2ec0d5cf1e246f8d9ae6cbc9fd0755ad37bb974b1f2fb603f3 Pin SHA256: K7rZOrXHknnsEhUH8nLL4MZkejquUuIvOIr6tCa0rbo= 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

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_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^P
# TLS 1.2 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (`0xcca8`) ECDH secp521r1 (eq. 15360 bits RSA) FS	256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (`0xc02f`) ECDH secp521r1 (eq. 15360 bits RSA) FS	128
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (`0xc030`) ECDH secp521r1 (eq. 15360 bits RSA) FS	256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (`0x9f`) DH 2048 bits FS	256
(P) This server prefers ChaCha20 suites with clients that don't have AES-NI (e.g., Android devices)

Handshake Simulation
Android 4.4.2	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp521r1 FS
Android 5.0.0	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp521r1 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_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
Android 8.0	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
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
BingPreview Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp521r1 FS
Chrome 49 / XP SP3	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Chrome 69 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
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 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_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 49 / XP SP3	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 62 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Firefox 73 / Win 10 R	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH x25519 FS
Googlebot Feb 2018	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
IE 11 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2	TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 DH 2048 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 2048 FS
IE 11 / Win Phone 8.1 R	Server sent fatal alert: handshake_failure
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 2048 FS
IE 11 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Edge 15 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 16 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 18 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 13 / Win Phone 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Java 8u161	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 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 1.0.1l R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp521r1 FS
OpenSSL 1.0.2s R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
OpenSSL 1.1.0k R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
OpenSSL 1.1.1c R	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH x25519 FS
Safari 6 / iOS 6.0.1	Server sent fatal alert: handshake_failure
Safari 7 / iOS 7.1 R	Server sent fatal alert: handshake_failure
Safari 7 / OS X 10.9 R	Server sent fatal alert: handshake_failure
Safari 8 / iOS 8.4 R	Server sent fatal alert: handshake_failure
Safari 8 / OS X 10.10 R	Server sent fatal alert: handshake_failure
Safari 9 / iOS 9 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 9 / OS X 10.11 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 10 / iOS 10 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 10 / OS X 10.12 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 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
Apple ATS 9 / iOS 9 R	RSA 4096 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Yahoo Slurp Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp384r1 FS
YandexBot Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp521r1 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)
GOLDENDOODLE	No (more info)
OpenSSL 0-Length	No (more info)
Sleeping POODLE	No (more info)
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)	No (IDs empty)
Session resumption (tickets)	Yes
OCSP stapling	Yes
Strict Transport Security (HSTS)	Yes max-age=63072000
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	secp256r1, secp384r1, secp521r1, x25519 (Server has no preference)
SSL 2 handshake compatibility	No
0-RTT enabled	No

HTTP Requests

1 https://help.post.ch/ (HTTP/1.1 307 Temporary Redirect)
1
	Cache-Control	public, max-age=0, must-revalidate
	Content-Security-Policy	default-src 'self' 'unsafe-inline' https://cdn.sanity.io https://va.vercel-scripts.com https://vercel.live https://vercel.com; object-src 'none'; base-uri 'none'; img-src * data: blob: 'self' .post.ch www.googletagmanager.com https://ssl.gstatic.com https://www.gstatic.com https://vercel.live https://vercel.com https://.usercentrics.eu; font-src data: 'self' https://vercel.live https://assets.vercel.com https://fonts.gstatic.com; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://.usercentrics.eu https://.googletagmanager.com https://ssl.google-analytics.com https://www.google-analytics.com https://www.googletagmanager.com https://tagmanager.google.com https://cdn.sanity.io https://vercel.live https://vercel.com https://va.vercel-scripts.com; style-src 'self' 'unsafe-inline' https://tagmanager.google.com https://fonts.googleapis.com https://vercel.live https://www.googletagmanager.com; connect-src 'self' https://.usercentrics.eu https://.google-analytics.com https://.analytics.google.com https://.googletagmanager.com https://vercel.live https://vercel.com wss://ws-us3.pusher.com .post.ch .pusher.com .pusherapp.com; frame-src .post.ch https://vercel.live https://vercel.com;
	Content-Type	text/plain
	Date	Fri, 18 Jul 2025 07:16:09 GMT
	Location	/de/
	Reporting-Endpoints	csp-endpoint="https://violations.post.ch/CSP/HELP/prod/enforced"
	Server	Vercel
	Strict-Transport-Security	max-age=63072000
	X-Vercel-Id	sfo1::ssjll-1752822968489-296bda5b4b81
	Connection	close
	Transfer-Encoding	chunked

2 https://help.post.ch/de/ (HTTP/1.1 308 Permanent Redirect)
2
	Cache-Control	public, max-age=0, must-revalidate
	Content-Type	text/plain
	Date	Fri, 18 Jul 2025 07:16:09 GMT
	Location	/de
	Refresh	0;url=/de
	Server	Vercel
	Strict-Transport-Security	max-age=63072000
	X-Vercel-Id	sfo1::hmsw2-1752822969237-f309df43023c
	Connection	close
	Transfer-Encoding	chunked

3 https://help.post.ch/de (HTTP/1.1 200 OK)
3
	Accept	/
	Age	0
	Cache-Control	private, no-cache, no-store, max-age=0, must-revalidate
	Content-Security-Policy	default-src 'self' 'unsafe-inline' https://cdn.sanity.io https://va.vercel-scripts.com https://vercel.live https://vercel.com; object-src 'none'; base-uri 'none'; img-src * data: blob: 'self' .post.ch www.googletagmanager.com https://ssl.gstatic.com https://www.gstatic.com https://vercel.live https://vercel.com https://.usercentrics.eu; font-src data: 'self' https://vercel.live https://assets.vercel.com https://fonts.gstatic.com; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://.usercentrics.eu https://.googletagmanager.com https://ssl.google-analytics.com https://www.google-analytics.com https://www.googletagmanager.com https://tagmanager.google.com https://cdn.sanity.io https://vercel.live https://vercel.com https://va.vercel-scripts.com; style-src 'self' 'unsafe-inline' https://tagmanager.google.com https://fonts.googleapis.com https://vercel.live https://www.googletagmanager.com; connect-src 'self' https://.usercentrics.eu https://.google-analytics.com https://.analytics.google.com https://.googletagmanager.com https://vercel.live https://vercel.com wss://ws-us3.pusher.com .post.ch .pusher.com .pusherapp.com; frame-src .post.ch https://vercel.live https://vercel.com;
	Content-Type	text/html; charset=utf-8
	Date	Fri, 18 Jul 2025 07:16:09 GMT
	Forwarded	for=69.67.183.106;host=help.post.ch;proto=https
	Link	</_next/static/media/1cc7733fbe99a238-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/55a51300f9c378f1-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/bf281c35b8144624-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2"
	Reporting-Endpoints	csp-endpoint="https://violations.post.ch/CSP/HELP/prod/enforced"
	Sc-No-Header-Leak	1
	Sc-Runtime-Cache	1
	Server	Vercel
	Strict-Transport-Security	max-age=63072000
	User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
	Vary	RSC, Next-Router-State-Tree, Next-Router-Prefetch
	X-Current-Locale	de
	X-Forwarded-For	69.67.183.106
	X-Forwarded-Host	help.post.ch
	X-Forwarded-Proto	https
	X-Matched-Path	/[lang]
	X-Powered-By	Next.js
	X-Real-Ip	69.67.183.106
	X-Vercel-Cache	MISS
	X-Vercel-Deployment-Url	ppnl-help-pdrrnrvii-swisspost.vercel.app
	X-Vercel-Id	sfo1:sfo1::fra1::hmsw2-1752822969350-a700e493d54c
	X-Vercel-Ip-As-Number	27385
	X-Vercel-Ip-Continent	NA
	X-Vercel-Ip-Country	US
	X-Vercel-Ip-Latitude	37.751
	X-Vercel-Ip-Longitude	-97.822
	X-Vercel-Ip-Timezone	America/Chicago
	X-Vercel-Ja4-Digest	t12d030500_0f9cd282b7f5_c70a3c84db07
	X-Vercel-Proxied-For	69.67.183.106
	X-Vercel-Sc-Headers	{"x-vercel-function-platform":"vercel\/proxy+edge","Authorization":"Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkZXBsb3ltZW50SWQiOiJkcGxfOWVxVm0zaG9yQ0dNRnZoMkgybnJHRG1vTVZTYiIsInVubGltaXRlZCI6ZmFsc2UsInBsYW4iOiJlbnRlcnByaXNlIiwiaXNzIjoiZWRnZSIsImRvbWFpbiI6ImhlbHAucG9zdC5jaCIsImJsb2NrIjpmYWxzZSwiaWF0IjoxNzUyODIyOTY5LCJwcm9qZWN0SWQiOiJwcmpfTkZnZ3RKeG1NQkhJZVFMU2JscWUxMlRQdEpDeCIsImV4cCI6MTc1MjgyMzg4OSwib3duZXJJZCI6InRlYW1fNnFVdlpIVThTbXBNVlhEc3czSnFmR2xNIiwicmVxdWVzdElkIjoiaG1zdzItMTc1MjgyMjk2OTM1MC1hNzAwZTQ5M2Q1NGMiLCJlbnYiOiJwcm9kdWN0aW9uIn0.QmVjI2Gx5uHzP7dieErgN9t2WvnznVfB4z7y5gf4ryI"}
	X-Vercel-Sc-Host	sfo1.suspense-cache.vercel-infra.com
	Connection	close
	Transfer-Encoding	chunked

Miscellaneous
Test date	Fri, 18 Jul 2025 07:16:00 UTC
Test duration	40.328 seconds
HTTP status code	200
HTTP server signature	Vercel
Server hostname	-

SSL Report v2.4.1

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