cloudflare.com
Overall grade based on: IPv4: 2 of 2 complete · IPv6: 0 of 2 complete, 2 pending — IPv6 results are added below when their scan finishes; they do not count until then.
IPv6 scan in progress
2606:4700::6810:84e5 IPv6 · Pending: IPv6 scan not started yet (it runs when the report is opened, or via POST /api/ssl-check/{domain}/ipv6).
2606:4700::6810:85e5 IPv6 · Pending: IPv6 scan not started yet (it runs when the report is opened, or via POST /api/ssl-check/{domain}/ipv6).
The IPv4 report below is complete. IPv6 results will be added to this page automatically when the scan finishes.
All 2 endpoints share identical configuration Select an IP for owner, ASN & location
B 104.16.132.229 IPv4 WHOIS › B 104.16.133.229 IPv4 WHOIS › Grade Breakdown
Protocol Support 50%
Key Exchange 90%
Cipher Strength 100%
Certificate 100%
Grade capped at B: server supports obsolete TLS 1.0/1.1.
Security Vulnerabilities Detected
- •Obsolete TLS versions (1.0/1.1) supported.
- •Weak 3DES cipher supported (Sweet32).
- •CBC cipher suites with TLS 1.0/1.1 (BEAST, Lucky13).
Protocol Configuration
Supported Protocols
TLS 1.3
TLS 1.2
TLS 1.1
TLS 1.0
SSL 3
SSL 2
Negotiated Cipher
TLS_AES_256_GCM_SHA384
Protocol Details
| Connection | |
| ALPN | h2 http/1.1 |
| SNI Required | No |
| Supported Named Groups | X25519MLKEM768 X25519Kyber768Draft00 x25519 secp256r1 secp384r1 secp521r1 (server preference order) |
| Post-Quantum Key Exchange | Yes X25519MLKEM768, X25519Kyber768Draft00 |
| HTTP/3 (QUIC) | Unknown |
| Encrypted Client Hello | Unknown |
| Security Features | |
| Forward Secrecy | Yes (ECDHE / DHE) |
| Downgrade Prevention | Yes (TLS_FALLBACK_SCSV) |
| Secure Renegotiation | Supported (RFC 5746) |
| Extended Master Secret | Yes (RFC 7627) |
| OCSP Stapling | No (certificate has no OCSP responder) |
| HSTS | No |
| HSTS Preloading | Preloaded |
| Security Checks | |
| BEAST attack | Not mitigated server-side (TLS 1.0 + CBC) |
| POODLE (SSLv3) | No (SSL 3 not supported) |
| POODLE (TLS) | Possible (CBC + legacy TLS present) |
| RC4 | No |
| SSL/TLS Compression | No (not supported by .NET TLS stack) |
| Heartbleed | Not tested |
Cipher Suite Analysis
| Cipher Suite | Hex | Key Exchange | FS | Bits | Strength |
|---|---|---|---|---|---|
| # TLS 1.3 | |||||
| TLS_AES_128_GCM_SHA256 | 0x1301 | ECDHE | FS | 128 | Secure |
| TLS_AES_256_GCM_SHA384 | 0x1302 | ECDHE | FS | 256 | Secure |
| TLS_CHACHA20_POLY1305_SHA256 | 0x1303 | ECDHE | FS | 256 | Secure |
| # TLS 1.2 | |||||
| TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | 0xC02B | ECDHE | FS | 128 | Secure |
| TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 | 0xCCA9 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA | 0xC009 | ECDHE | FS | 128 | Weak |
| TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 | 0xC02C | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA | 0xC00A | ECDHE | FS | 256 | Weak |
| TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 | 0xC023 | ECDHE | FS | 128 | Weak |
| TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 | 0xC024 | ECDHE | FS | 256 | Weak |
| TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | 0xC02F | ECDHE | FS | 128 | Secure |
| TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | 0xCCA8 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA | 0xC013 | ECDHE | FS | 128 | Weak |
| TLS_RSA_WITH_AES_128_GCM_SHA256 | 0x009C | RSA | No FS | 128 | Weak |
| TLS_RSA_WITH_AES_128_CBC_SHA | 0x002F | RSA | No FS | 128 | Weak |
| TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 | 0xC030 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA | 0xC014 | ECDHE | FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_GCM_SHA384 | 0x009D | RSA | No FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_CBC_SHA | 0x0035 | RSA | No FS | 256 | Weak |
| TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 | 0xC027 | ECDHE | FS | 128 | Weak |
| TLS_RSA_WITH_AES_128_CBC_SHA256 | 0x003C | RSA | No FS | 128 | Weak |
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 | 0xC028 | ECDHE | FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_CBC_SHA256 | 0x003D | RSA | No FS | 256 | Weak |
| TLS_RSA_WITH_3DES_EDE_CBC_SHA | 0x000A | RSA | No FS | 112 | Weak |
Handshake Simulation
| Client | Protocol | Cipher Suite | Result |
|---|---|---|---|
| Chrome 120 / Win 11 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Chrome 80 / Win 10 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Firefox 115 / Win 10 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| iOS 17 / Safari | TLS 1.3 | TLS_CHACHA20_POLY1305_SHA256 | Success |
| macOS 14 / Safari | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Android 14 | TLS 1.3 | TLS_AES_128_GCM_SHA256 | Success |
| Chrome 69 / Win 7 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Chrome 49 / XP SP3 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| IE 11 / Win 10 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| IE 11 / Win 7 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 9.0 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 7.0 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 5.0 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 4.4.2 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Java 11 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Java 8u121 | TLS 1.2 | TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 4.0.4 | TLS 1.0 | TLS_RSA_WITH_3DES_EDE_CBC_SHA | Success |
| Android 4.1.1 | TLS 1.0 | TLS_RSA_WITH_3DES_EDE_CBC_SHA | Success |
| Baidu Jan 2015 | TLS 1.0 | TLS_RSA_WITH_3DES_EDE_CBC_SHA | Success |
| Java 6 | TLS 1.0 | TLS_RSA_WITH_3DES_EDE_CBC_SHA | Success |
* Simulated based on server's supported protocols and cipher configuration.
Certificate Identity
| Common Name | cloudflare.com |
| Alt Names | cloudflare.com ns.cloudflare.com *.ns.cloudflare.com *.secondary.cloudflare.com secondary.cloudflare.com |
| Issuer | CN=WE1, O=Google Trust Services, C=US |
| Validity | 2026-09-05 to 2026-12-04 (27 days remaining) |
| Key | ECDSA 256 bits (sha256ECDSA) |
| Serial Number | 00D509925C8DB10E1913A3A1CB1C7B05AB |
| SHA256 Fingerprint | 961034ebe73c0aab92ee5c127a4265b99abc36cdf0b53b82b10788e087a72a14 |
| Pin SHA256 | dwjmLC0WOWNMwJPMHi67GYDnrQDrLk5cFVlmeutsGCs= |
Certificate Properties
| Type | DV |
| Cert Transparency | Yes (SCT) |
| OCSP Must Staple | No |
| Revocation | Good (not revoked) CRL: http://c.pki.goog/we1/gAooAfzx9uw.crl No OCSP responder — revocation is published via CRL only (as CA/B Forum rules now allow). |
| DNS CAA | No (missing) |
| Trusted By | Yes Mozilla · Apple · Android · Java · Windows |
| Name Match | Yes |
| Validity Period | 90 days (maximum 200 days for certificates issued then) |
| Chain Issues | None |
Trust Chain Architecture
End-Entity Certificate
CN=cloudflare.com (Issuer: CN=WE1, O=Google Trust Services, C=US)
Intermediate CA
CN=WE1, O=Google Trust Services, C=US (Issuer: CN=GTS Root R4, O=Google Trust Services LLC, C=US)
Root Certificate
CN=GTS Root R4, O=Google Trust Services LLC, C=US (Issuer: CN=GTS Root R4, O=Google Trust Services LLC, C=US)
TLS History & Relations
Everything our scans have seen for cloudflare.com, first seen 2026-09-28; current certificate since 2026-09-28.
Certificates served
| Certificate (SHA-256) | Issuer | Valid | Served |
|---|---|---|---|
| 961034ebe73c0aab… current | WE1 | 2026-09-05 → 2026-12-04 | 2026-09-28 |
Addresses
| Address | Certificate | Seen |
|---|---|---|
| 104.16.132.229 | 961034ebe73c0aab… | 2026-09-28 |
| 104.16.133.229 | 961034ebe73c0aab… | 2026-09-28 |
TLS history (a row per change; repeated checks only extend it)
| Since → last checked (UTC) | Grade | TLS | Certificates | Addresses |
|---|---|---|---|---|
| 2026-09-28 19:55 | B | TLS 1.3 | 961034ebe73c0aab… | 104.16.132.229, 104.16.133.229 |