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Address
Host

www.kernel-error.de

QUIC is supported

HTTP/3 is supported

HTTP/3 Check established a QUIC connection for all attempts made with the given endpoint. See the metrics below for more information.

0-RTT

Zero Round Trip Time Resumption (0-RTT)

The QUIC handshake for this connection was completed without any additional round-trips.

SUCCESS
h3 h3 h3-29

QUIC Versions

These are the QUIC versions supported by this QUIC endpoint.

AGREED SUPPORTED
Connection ID

Connection ID

This unique identifier for a QUIC connection is used to ensure that changes to an endpoint's lower network layer address (UDP/IP) does not affect the delivery of the QUIC connection's packets.

This tool attempts two connections to test the server's 0-RTT capabilities. During the first connection, the client receives important handshake material from the server. With 0-RTT, the client can start to send data immediately if it uses this handshake material when it creates the second connection.

Packet RX

Packet RX

This value represents the time between the first packet sent and the first packet received (measured in milliseconds).

Handshake Done

Handshake Done

This value represents the time between when the first packet is sent and when the handshake is completed (measured in milliseconds).

Take notice of the difference in this metric between the first connection and the second connection. Using 0-RTT, future connections (i.e. the second connection) can complete the handshake much faster than the original connection.

9AA6EFE75D... 90.93 92.223
8390658B0A... 90.235 90.593

Read detailed descriptions of the items and metrics shown above.

HTTP/3 Statistics

Zero Round Trip Time Resumption (0-RTT)

The QUIC handshake for this connection was completed without any additional round-trips.

SUCCESS

QUIC Versions

These are the QUIC versions supported by this QUIC endpoint.

AGREED SUPPORTED

Connection ID

This unique identifier for a QUIC connection is used to ensure that changes to an endpoint's lower network layer address (UDP/IP) does not affect the delivery of the QUIC connection's packets.

This tool attempts two connections to test the server's 0-RTT capabilities. During the first connection, the client receives important handshake material from the server. With 0-RTT, the client can start to send data immediately if it uses this handshake material when it creates the second connection.


Packet RX

This value represents the time between the first packet sent and the first packet received (measured in milliseconds).


Handshake Done

This value represents the time between when the first packet is sent and when the handshake is completed (measured in milliseconds).

Take notice of the difference in this metric between the first connection and the second connection. Using 0-RTT, future connections (i.e. the second connection) can complete the handshake much faster than the original connection.


QLog

QLog is a standard under development for QUIC Connection debugging and visualization. Learn more at https://quic.edm.uhasselt.be/

To view or download the raw QLog ("application/json"), add "format=qlog" to the HTTP query string.

HTTP Header

HTTP/1.1 200 OK
date: Mon, 19 Jan 2026 14:44:57 GMT
content-type: text/html; charset=UTF-8
vary: accept-encoding
link: <https://www.kernel-error.de/wp-json/>; rel="https://api.w.org/"
link: <https://www.kernel-error.de/wp-json/wp/v2/pages/23>; rel="alternate"; title="JSON"; type="application/json"
link: <https://www.kernel-error.de/>; rel=shortlink
server: He is dead Jim!
strict-transport-security: max-age=63072000; includeSubDomains; preload
quic-status: h3
alt-svc: h3=":443"; ma=86400
x-frame-options: SAMEORIGIN
referrer-policy: no-referrer
x-content-type-options: nosniff
x-cache: HIT
x-xss-protection: 1; mode=block
content-security-policy: default-src 'self' 'unsafe-inline' 'unsafe-eval' https: data: *.kernel-error.de;
permissions-policy: accelerometer=(), ambient-light-sensor=(), autoplay=(), camera=(), encrypted-media=(), fullscreen=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=(), sync-xhr=(self 'https://haveibeenpwned.com' 'https://twofactorauth.org'), usb=(), vr=()
onion-location: http://jjyvff6eh3kp7ydfkamm27cldhsee2cl6wzfa5lfjyrfyribgeaesgqd.onion/
alt-svc: http="jjyvff6eh3kp7ydfkamm27cldhsee2cl6wzfa5lfjyrfyribgeaesgqd.onion:80"; ma=86400
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400

Certificate Chain

Domain *.kernel-error.de
Issued By RapidSSL TLS ECC CA G1
Expires Tuesday, May 05, 2026 at 11:59:59 PM GMT
Subject
Common Name *.kernel-error.de
Issuer
Country US
Organization DigiCert Inc
Unit www.digicert.com
Common Name RapidSSL TLS ECC CA G1
Serial Number 20881457778335730906665595873734886825
Signature Algorithm ecdsa-with-SHA256
Version
Public Key Bits 384
Public Key Type DSA

Domain RapidSSL TLS ECC CA G1
Issued By DigiCert Global Root G3
Expires Tuesday, November 02, 2027 at 12:59:58 PM GMT
Subject
Country US
Organization DigiCert Inc
Unit www.digicert.com
Common Name RapidSSL TLS ECC CA G1
Issuer
Country US
Organization DigiCert Inc
Unit www.digicert.com
Common Name DigiCert Global Root G3
Serial Number 18512984099829830473163133259145466347
Signature Algorithm ecdsa-with-SHA256
Version
Public Key Bits 256
Public Key Type DSA

QLog Output

QLog

QLog is a standard under development for QUIC Connection debugging and visualization. Learn more at https://quic.edm.uhasselt.be/

To view or download the raw QLog ("application/json"), add "format=qlog" to the HTTP query string.

{
  "qlog_version": "0.1",
  "description": "www.kernel-error.de",
  "connections": [
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "9AA6EFE75DF7A6BD",
      "starttime": 8752317756577,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "6",
            "srcip": "::",
            "dstip": "2a01:4f8:262:4716::443",
            "srcport": "57658",
            "dstport": "443"
          }
        ],
        [
          72,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          90930,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "c100000001089aa6efe75df7a6bd14d2a76447350bfea28b972f71675d00ca...",
            "header": {
              "type": "INIT",
              "payload_length": "138",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          90935,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          91202,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e000000001089aa6efe75df7a6bd14d2a76447350bfea28b972f71675d00ca...",
            "header": {
              "type": "HSK",
              "payload_length": "1030",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          91329,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ec00000001089aa6efe75df7a6bd14d2a76447350bfea28b972f71675d00ca...",
            "header": {
              "type": "HSK",
              "payload_length": "1184",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          91465,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e100000001089aa6efe75df7a6bd14d2a76447350bfea28b972f71675d00ca...",
            "header": {
              "type": "HSK",
              "payload_length": "309",
              "packet_number": "2"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          91572,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          91572,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          92223,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          367053,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "509aa6efe75df7a6bd1916fd21e2eabd5d911d17726f01ea13c40ae8ebb834...",
            "header": {
              "type": "SHORT",
              "payload_length": "438",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          367231,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "569aa6efe75df7a6bd5c20c8877f3d05634a2076b6222d425c0e778f8deb6e...",
            "header": {
              "type": "SHORT",
              "payload_length": "974",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    },
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "8390658B0A02C1DB",
      "starttime": 8752318124362,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "6",
            "srcip": "::",
            "dstip": "2a01:4f8:262:4716::443",
            "srcport": "57658",
            "dstport": "443"
          }
        ],
        [
          41,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          90235,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "cd00000001088390658b0a02c1db14e493c6a9e5eded859c8d3349ebf18026...",
            "header": {
              "type": "INIT",
              "payload_length": "144",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          90239,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          90544,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e000000001088390658b0a02c1db14e493c6a9e5eded859c8d3349ebf18026...",
            "header": {
              "type": "HSK",
              "payload_length": "1024",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          90593,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          90612,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          361321,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4f8390658b0a02c1db5dd063d7df1f9d1ce0b2999c0886cdc0e7dbcb971c48...",
            "header": {
              "type": "SHORT",
              "payload_length": "378",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          361470,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "408390658b0a02c1db6e401522b18dea9e657c8d213e51a1b8ce362b5a4b30...",
            "header": {
              "type": "SHORT",
              "payload_length": "974",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    }
  ]
}