HTTP/3 Check - www.http3check.net

About

Use Advanced Search to bypass hostname resolution and use a custom IP address or port.

www.http3check.net

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

h3 h3-29 h3-Q050 h3-Q046 h3-Q043 Q043 Q046

CID 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.	RX Packet RX This value represents the time between the first packet sent and the first packet received (measured in milliseconds).	HSK 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.
260..	0.88	2.55
74F..	0.58	0.86

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
content-type: text/html; charset=utf-8
content-length: 8172
date: Thu, 21 Sep 2023 23:09:32 GMT
server: LiteSpeed
alt-svc: h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"; ma=2592000; v="43,46"

Certificate Chain

Domain	*.http3check.net
Issued By	R3
Expires	Tuesday, December 05, 2023 at 03:15:23 AM GMT

Subject
Common Name	*.http3check.net

Issuer
Country	US
Organization	Let's Encrypt
Common Name	R3

Serial Number	377759453701006963587961812823437786516482
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	256
Public Key Type	DSA

Domain	R3
Issued By	ISRG Root X1
Expires	Monday, September 15, 2025 at 04:00:00 PM GMT

Subject
Country	US
Organization	Let's Encrypt
Common Name	R3

Issuer
Country	US
Organization	Internet Security Research Group
Common Name	ISRG Root X1

Serial Number	192961496339968674994309121183282847578
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	2048
Public Key Type	RSA

Domain	ISRG Root X1
Issued By	DST Root CA X3
Expires	Monday, September 30, 2024 at 06:14:03 PM GMT

Subject
Country	US
Organization	Internet Security Research Group
Common Name	ISRG Root X1

Issuer
Organization	Digital Signature Trust Co.
Common Name	DST Root CA X3

Serial Number	85078200265644417569109389142156118711
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	4096
Public Key Type	RSA

QLog Output

{
  "qlog_version": "0.1",
  "description": "www.http3check.net",
  "connections": [
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "260AC9C03878FF80",
      "starttime": 12259354432682,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "4",
            "srcip": "0.0.0.0",
            "dstip": "208.167.245.252",
            "srcport": "54139",
            "dstport": "443"
          }
        ],
        [
          95,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          881,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "cd0000000108260ac9c03878ff8008043933b35a8a61e10044ca5083cc801b...",
            "header": {
              "type": "INIT",
              "payload_length": "1236",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          884,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          1125,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "cb0000000108260ac9c03878ff8008043933b35a8a61e1004019e4e20a0159",
            "header": {
              "type": "INIT",
              "payload_length": "35",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          1160,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e70000000108260ac9c03878ff8008043933b35a8a61e144cbb4e8bfe2d49c...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "2"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          1511,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ea0000000108260ac9c03878ff8008043933b35a8a61e144cb58718a183902...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "3"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          1795,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e10000000108260ac9c03878ff8008043933b35a8a61e144cb1355e3a6acf9...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "4"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          2045,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e90000000108260ac9c03878ff8008043933b35a8a61e141bf608cc107d39c...",
            "header": {
              "type": "HSK",
              "payload_length": "456",
              "packet_number": "5"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2546,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          2619,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ed0000000108260ac9c03878ff8008043933b35a8a61e140197fa5158c4ca8",
            "header": {
              "type": "HSK",
              "payload_length": "34",
              "packet_number": "6"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          4098,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "45260ac9c03878ff80ede2b13c33bcbab14569c5ef303758cd6d141e47ecc9...",
            "header": {
              "type": "SHORT",
              "payload_length": "443",
              "packet_number": "7"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          4162,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e20000000108260ac9c03878ff8008043933b35a8a61e140191f7b3a0772b2",
            "header": {
              "type": "HSK",
              "payload_length": "50",
              "packet_number": "4611686018427387904"
            }
          }
        ],
        [
          4189,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "46260ac9c03878ff8058add0a7b1f4f63e02a18b5fc9781e54db5dc094f6fb...",
            "header": {
              "type": "SHORT",
              "payload_length": "115",
              "packet_number": "9"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "NEW_TOKEN"
              }
            ]
          }
        ],
        [
          4237,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "44260ac9c03878ff804d4d79883519b6ebf157758d85344fb8dfd02a246cf0...",
            "header": {
              "type": "SHORT",
              "payload_length": "197",
              "packet_number": "10"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    },
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "74F7138EE452C7F8",
      "starttime": 12259354437508,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "4",
            "srcip": "0.0.0.0",
            "dstip": "208.167.245.252",
            "srcport": "54139",
            "dstport": "443"
          }
        ],
        [
          63,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          580,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "c2000000010874f7138ee452c7f80866d45d7b40b391c50044ca6ddc6fd0e5...",
            "header": {
              "type": "INIT",
              "payload_length": "1236",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          582,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          791,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ed000000010874f7138ee452c7f80866d45d7b40b391c540b8b14ede909f85...",
            "header": {
              "type": "HSK",
              "payload_length": "193",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          864,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          957,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          1037,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "c0000000010874f7138ee452c7f80866d45d7b40b391c50040193fd916417f",
            "header": {
              "type": "INIT",
              "payload_length": "35",
              "packet_number": "2"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          2102,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4274f7138ee452c7f804ef4cc4b0bae84757ba5090de9817af70fb3b7032e6...",
            "header": {
              "type": "SHORT",
              "payload_length": "443",
              "packet_number": "3"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          2164,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e4000000010874f7138ee452c7f80866d45d7b40b391c5401925c03fec80d8",
            "header": {
              "type": "HSK",
              "payload_length": "50",
              "packet_number": "4611686018427387904"
            }
          }
        ],
        [
          2191,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4774f7138ee452c7f885221faba3b8ce00243d39ca2d5432b5ef5b679e9f70...",
            "header": {
              "type": "SHORT",
              "payload_length": "115",
              "packet_number": "5"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "NEW_TOKEN"
              }
            ]
          }
        ],
        [
          2226,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4174f7138ee452c7f8a70721ab3cda695e393d1b7a480bad4084ca22c66ed2...",
            "header": {
              "type": "SHORT",
              "payload_length": "197",
              "packet_number": "6"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    }
  ]
}

www.http3check.net

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 h3-29 h3-Q050 h3-Q046 h3-Q043 Q043 Q046

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.
260AC9C038...	0.881	2.546
74F7138EE4...	0.58	0.864

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

Packet RX

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

Handshake Done

QLog

HTTP Header

HTTP/1.1 200 OK
content-type: text/html; charset=utf-8
content-length: 8172
date: Thu, 21 Sep 2023 23:09:32 GMT
server: LiteSpeed
alt-svc: h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"; ma=2592000; v="43,46"

Certificate Chain

Domain	*.http3check.net
Issued By	R3
Expires	Tuesday, December 05, 2023 at 03:15:23 AM GMT

Subject
Common Name	*.http3check.net

Issuer
Country	US
Organization	Let's Encrypt
Common Name	R3

Serial Number	377759453701006963587961812823437786516482
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	256
Public Key Type	DSA

Domain	R3
Issued By	ISRG Root X1
Expires	Monday, September 15, 2025 at 04:00:00 PM GMT

Subject
Country	US
Organization	Let's Encrypt
Common Name	R3

Issuer
Country	US
Organization	Internet Security Research Group
Common Name	ISRG Root X1

Serial Number	192961496339968674994309121183282847578
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	2048
Public Key Type	RSA

Domain	ISRG Root X1
Issued By	DST Root CA X3
Expires	Monday, September 30, 2024 at 06:14:03 PM GMT

Subject
Country	US
Organization	Internet Security Research Group
Common Name	ISRG Root X1

Issuer
Organization	Digital Signature Trust Co.
Common Name	DST Root CA X3

Serial Number	85078200265644417569109389142156118711
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	4096
Public Key Type	RSA

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.http3check.net",
  "connections": [
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "260AC9C03878FF80",
      "starttime": 12259354432682,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "4",
            "srcip": "0.0.0.0",
            "dstip": "208.167.245.252",
            "srcport": "54139",
            "dstport": "443"
          }
        ],
        [
          95,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          881,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "cd0000000108260ac9c03878ff8008043933b35a8a61e10044ca5083cc801b...",
            "header": {
              "type": "INIT",
              "payload_length": "1236",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          884,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          1125,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "cb0000000108260ac9c03878ff8008043933b35a8a61e1004019e4e20a0159",
            "header": {
              "type": "INIT",
              "payload_length": "35",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          1160,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e70000000108260ac9c03878ff8008043933b35a8a61e144cbb4e8bfe2d49c...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "2"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          1511,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ea0000000108260ac9c03878ff8008043933b35a8a61e144cb58718a183902...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "3"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          1795,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e10000000108260ac9c03878ff8008043933b35a8a61e144cb1355e3a6acf9...",
            "header": {
              "type": "HSK",
              "payload_length": "1236",
              "packet_number": "4"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          2045,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e90000000108260ac9c03878ff8008043933b35a8a61e141bf608cc107d39c...",
            "header": {
              "type": "HSK",
              "payload_length": "456",
              "packet_number": "5"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2269,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          2546,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          2619,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ed0000000108260ac9c03878ff8008043933b35a8a61e140197fa5158c4ca8",
            "header": {
              "type": "HSK",
              "payload_length": "34",
              "packet_number": "6"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          4098,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "45260ac9c03878ff80ede2b13c33bcbab14569c5ef303758cd6d141e47ecc9...",
            "header": {
              "type": "SHORT",
              "payload_length": "443",
              "packet_number": "7"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          4162,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e20000000108260ac9c03878ff8008043933b35a8a61e140191f7b3a0772b2",
            "header": {
              "type": "HSK",
              "payload_length": "50",
              "packet_number": "4611686018427387904"
            }
          }
        ],
        [
          4189,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "46260ac9c03878ff8058add0a7b1f4f63e02a18b5fc9781e54db5dc094f6fb...",
            "header": {
              "type": "SHORT",
              "payload_length": "115",
              "packet_number": "9"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "NEW_TOKEN"
              }
            ]
          }
        ],
        [
          4237,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "44260ac9c03878ff804d4d79883519b6ebf157758d85344fb8dfd02a246cf0...",
            "header": {
              "type": "SHORT",
              "payload_length": "197",
              "packet_number": "10"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    },
    {
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "connectionid": "74F7138EE452C7F8",
      "starttime": 12259354437508,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "ip_version": "4",
            "srcip": "0.0.0.0",
            "dstip": "208.167.245.252",
            "srcport": "54139",
            "dstport": "443"
          }
        ],
        [
          63,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "00000001"
          }
        ],
        [
          580,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "c2000000010874f7138ee452c7f80866d45d7b40b391c50044ca6ddc6fd0e5...",
            "header": {
              "type": "INIT",
              "payload_length": "1236",
              "packet_number": "0"
            },
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          582,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "00000001"
          }
        ],
        [
          791,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "ed000000010874f7138ee452c7f80866d45d7b40b391c540b8b14ede909f85...",
            "header": {
              "type": "HSK",
              "payload_length": "193",
              "packet_number": "1"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ]
          }
        ],
        [
          864,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          957,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          1037,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "c0000000010874f7138ee452c7f80866d45d7b40b391c50040193fd916417f",
            "header": {
              "type": "INIT",
              "payload_length": "35",
              "packet_number": "2"
            },
            "frames": [
              {
                "frame_type": "ACK"
              }
            ]
          }
        ],
        [
          2102,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4274f7138ee452c7f804ef4cc4b0bae84757ba5090de9817af70fb3b7032e6...",
            "header": {
              "type": "SHORT",
              "payload_length": "443",
              "packet_number": "3"
            },
            "frames": [
              {
                "frame_type": "CRYPTO"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ]
          }
        ],
        [
          2164,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "e4000000010874f7138ee452c7f80866d45d7b40b391c5401925c03fec80d8",
            "header": {
              "type": "HSK",
              "payload_length": "50",
              "packet_number": "4611686018427387904"
            }
          }
        ],
        [
          2191,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4774f7138ee452c7f885221faba3b8ce00243d39ca2d5432b5ef5b679e9f70...",
            "header": {
              "type": "SHORT",
              "payload_length": "115",
              "packet_number": "5"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "NEW_CONNECTION_ID"
              },
              {
                "frame_type": "NEW_TOKEN"
              }
            ]
          }
        ],
        [
          2226,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "raw": "4174f7138ee452c7f8a70721ab3cda695e393d1b7a480bad4084ca22c66ed2...",
            "header": {
              "type": "SHORT",
              "payload_length": "197",
              "packet_number": "6"
            },
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ]
          }
        ]
      ]
    }
  ]
}

QUIC is supported

HTTP/3 is supported

Zero Round Trip Time Resumption (0-RTT)

QUIC Versions

Connection ID

Packet RX

Handshake Done

HTTP/3 Statistics

Zero Round Trip Time Resumption (0-RTT)

QUIC Versions

Connection ID

Packet RX

Handshake Done

QLog

www.http3check.net

QUIC is supported

HTTP/3 is supported

Zero Round Trip Time Resumption (0-RTT)

QUIC Versions

Connection ID

Packet RX

Handshake Done

HTTP/3 Statistics

Zero Round Trip Time Resumption (0-RTT)

QUIC Versions

Connection ID

Packet RX

Handshake Done

QLog

HTTP Header

Certificate Chain

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

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.