HTTP/3 Check - www.facebook.com

About

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

www.facebook.com

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

h3-29 h3-27

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.
7DE..	35.32	33.77
4D9..	38.93	37.05

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
vary: Accept-Encoding
set-cookie: fr=1G57KOaf7ffTTaybe..Bgyi7a.Nc.AAA.0.0.Bgyi7a.AWWwKbNaMt8; expires=Tue, 14-Sep-2021 17:03:21 GMT; Max-Age=7775999; path=/; domain=.facebook.com; secure; httponly
set-cookie: sb=2i7KYLjXojy7uJ81-Q5P3IDf; expires=Fri, 16-Jun-2023 17:03:22 GMT; Max-Age=63072000; path=/; domain=.facebook.com; secure; httponly
x-fb-rlafr: 0
pragma: no-cache
cache-control: private, no-cache, no-store, must-revalidate
expires: Sat, 01 Jan 2000 00:00:00 GMT
x-content-type-options: nosniff
x-xss-protection: 0
x-frame-options: DENY
strict-transport-security: max-age=15552000; preload
content-type: text/html; charset="utf-8"
x-fb-debug: HcAsn8syihnVMOb0kIcLvPQ9BCzLz0EbmnDK7mQ42IjcqxEKyjYbA183t/vhLLGI6lrzbLhJpQ+9iIezHihsBw==
date: Wed, 16 Jun 2021 17:03:22 GMT
priority: u=3,i
alt-svc: h3-29=":443"; ma=3600,h3-27=":443"; ma=3600

Certificate Chain

Domain	*.facebook.com
Issued By	DigiCert SHA2 High Assurance Server CA
Expires	Tuesday, August 24, 2021 at 11:59:59 PM GMT

Subject
Organization	Facebook, Inc.
Locality	Menlo Park
State/Province	California
Country	US
Common Name	*.facebook.com

Issuer
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert SHA2 High Assurance Server CA

Serial Number	11649360478121669874897127695171127468
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	256
Public Key Type	DSA

Domain	DigiCert SHA2 High Assurance Server CA
Issued By	DigiCert High Assurance EV Root CA
Expires	Sunday, October 22, 2028 at 12:00:00 PM GMT

Subject
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert SHA2 High Assurance Server CA

Issuer
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert High Assurance EV Root CA

Serial Number	6489877074546166222510380951761917343
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	2048
Public Key Type	RSA

QLog Output

{
  "qlog_version": "0.1",
  "connections": [
    {
      "starttime": 85805120330867,
      "qlog_version": "0.1",
      "connectionid": "7DE6F2C9F2D4EF94",
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "srcip": "::",
            "dstip": "2a03:2880:f12c:83:face:b00c:0:25de",
            "dstport": "443",
            "srcport": "51648",
            "ip_version": "6"
          }
        ],
        [
          11,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "FF00001D"
          }
        ],
        [
          33775,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "c4ff00001d087de6f2c9f2d4ef940867ed8a60434e91f40044b6040b56e422..."
          }
        ],
        [
          33780,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "FF00001D"
          }
        ],
        [
          34469,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "caff00001d087de6f2c9f2d4ef940867ed8a60434e91f40044b652dc12659e..."
          }
        ],
        [
          35183,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Handshake",
              "payload_length": "191"
            },
            "raw": "efff00001d087de6f2c9f2d4ef940867ed8a60434e91f440b65b2c8e223600..."
          }
        ],
        [
          35324,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          35330,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          35349,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Short",
              "payload_length": "18"
            },
            "raw": "5c7de6f2c9f2d4ef9441b5b9fdbe811bf48ec0542f02822fc9c04f26eac3f2"
          }
        ],
        [
          35357,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Short",
              "payload_length": "47"
            },
            "raw": "527de6f2c9f2d4ef940bf767c99d969d77fbab1d3e67b6ea8d5a9a25722d69"
          }
        ],
        [
          68898,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Handshake",
              "payload_length": "31"
            },
            "raw": "edff00001d087de6f2c9f2d4ef940867ed8a60434e91f44016cd4f5c4289e3"
          }
        ],
        [
          68970,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ],
            "header": {
              "packet_number": "3457800",
              "type": "Short",
              "payload_length": "20"
            },
            "raw": "4e7de6f2c9f2d4ef94d151f47ea3ddbf2954791c8312f94b6028d9e50b9528"
          }
        ],
        [
          69180,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457801",
              "type": "Short",
              "payload_length": "250"
            },
            "raw": "5c7de6f2c9f2d4ef94ef6676d6986bbb67b175a41de2d190462a92b475a658..."
          }
        ],
        [
          215344,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457802",
              "type": "Short",
              "payload_length": "582"
            },
            "raw": "557de6f2c9f2d4ef9469fbf0dee65e74821d21e68ab098beb08ef275976450..."
          }
        ]
      ],
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "vantagepoint": "NETWORK"
    },
    {
      "starttime": 85805120161831,
      "qlog_version": "0.1",
      "connectionid": "4D99C32ECEB46982",
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "srcip": "::",
            "dstip": "2a03:2880:f12c:83:face:b00c:0:25de",
            "dstport": "443",
            "srcport": "51648",
            "ip_version": "6"
          }
        ],
        [
          2139,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "FF00001D"
          }
        ],
        [
          37048,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "ceff00001d084d99c32eceb469820867ed8a6a3d5327060044b6092235e52f..."
          }
        ],
        [
          37054,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "FF00001D"
          }
        ],
        [
          37178,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "c6ff00001d084d99c32eceb469820867ed8a6a3d5327060044b6e8b33864e2..."
          }
        ],
        [
          37836,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Handshake",
              "payload_length": "1216"
            },
            "raw": "eeff00001d084d99c32eceb469820867ed8a6a3d53270644b7cedef0ea96ee..."
          }
        ],
        [
          38069,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Handshake",
              "payload_length": "1216"
            },
            "raw": "e7ff00001d084d99c32eceb469820867ed8a6a3d53270644b766fadfced390..."
          }
        ],
        [
          38300,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133724",
              "type": "Handshake",
              "payload_length": "808"
            },
            "raw": "e0ff00001d084d99c32eceb469820867ed8a6a3d532706431f3d6b94b9079d..."
          }
        ],
        [
          38668,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          38668,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          38928,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          38963,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Short",
              "payload_length": "48"
            },
            "raw": "414d99c32eceb46982363a547ee5b3cb52266c620601ce1045f2aa31ba8675..."
          }
        ],
        [
          72558,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133725",
              "type": "Handshake",
              "payload_length": "31"
            },
            "raw": "efff00001d084d99c32eceb469820867ed8a6a3d5327064016e2a99236724d"
          }
        ],
        [
          72620,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Short",
              "payload_length": "19"
            },
            "raw": "4a4d99c32eceb46982d5b2742da669f572e19b30585f308d394833a14a5adb"
          }
        ],
        [
          72953,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133724",
              "type": "Short",
              "payload_length": "251"
            },
            "raw": "414d99c32eceb46982d399d4705592afdf6165b090a1b093f31aa2915437df..."
          }
        ],
        [
          82529,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "header": {
              "packet_number": "4611686018427387904",
              "type": "Handshake",
              "payload_length": "49"
            },
            "raw": "e6ff00001d084d99c32eceb469820867ed8a6a3d5327064018f7e4bc82991e"
          }
        ],
        [
          82564,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133725",
              "type": "Short",
              "payload_length": "20"
            },
            "raw": "5b4d99c32eceb469823498af6fc3ee258844c492e566e8dd665761594ec537"
          }
        ],
        [
          168402,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133726",
              "type": "Short",
              "payload_length": "578"
            },
            "raw": "454d99c32eceb469820b41bd4d983c200d4750608b0cbb298632ef54597cc4..."
          }
        ]
      ],
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "vantagepoint": "NETWORK"
    }
  ],
  "description": "www.facebook.com"
}

www.facebook.com

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

h3-29 h3-27

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.
7DE6F2C9F2...	35.324	33.775
4D99C32ECE...	38.928	37.048

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
vary: Accept-Encoding
set-cookie: fr=1G57KOaf7ffTTaybe..Bgyi7a.Nc.AAA.0.0.Bgyi7a.AWWwKbNaMt8; expires=Tue, 14-Sep-2021 17:03:21 GMT; Max-Age=7775999; path=/; domain=.facebook.com; secure; httponly
set-cookie: sb=2i7KYLjXojy7uJ81-Q5P3IDf; expires=Fri, 16-Jun-2023 17:03:22 GMT; Max-Age=63072000; path=/; domain=.facebook.com; secure; httponly
x-fb-rlafr: 0
pragma: no-cache
cache-control: private, no-cache, no-store, must-revalidate
expires: Sat, 01 Jan 2000 00:00:00 GMT
x-content-type-options: nosniff
x-xss-protection: 0
x-frame-options: DENY
strict-transport-security: max-age=15552000; preload
content-type: text/html; charset="utf-8"
x-fb-debug: HcAsn8syihnVMOb0kIcLvPQ9BCzLz0EbmnDK7mQ42IjcqxEKyjYbA183t/vhLLGI6lrzbLhJpQ+9iIezHihsBw==
date: Wed, 16 Jun 2021 17:03:22 GMT
priority: u=3,i
alt-svc: h3-29=":443"; ma=3600,h3-27=":443"; ma=3600

Certificate Chain

Domain	*.facebook.com
Issued By	DigiCert SHA2 High Assurance Server CA
Expires	Tuesday, August 24, 2021 at 11:59:59 PM GMT

Subject
Organization	Facebook, Inc.
Locality	Menlo Park
State/Province	California
Country	US
Common Name	*.facebook.com

Issuer
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert SHA2 High Assurance Server CA

Serial Number	11649360478121669874897127695171127468
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	256
Public Key Type	DSA

Domain	DigiCert SHA2 High Assurance Server CA
Issued By	DigiCert High Assurance EV Root CA
Expires	Sunday, October 22, 2028 at 12:00:00 PM GMT

Subject
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert SHA2 High Assurance Server CA

Issuer
Organization	DigiCert Inc
Unit	www.digicert.com
Country	US
Common Name	DigiCert High Assurance EV Root CA

Serial Number	6489877074546166222510380951761917343
Signature Algorithm	sha256WithRSAEncryption
Version

Public Key Bits	2048
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",
  "connections": [
    {
      "starttime": 85805120330867,
      "qlog_version": "0.1",
      "connectionid": "7DE6F2C9F2D4EF94",
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "srcip": "::",
            "dstip": "2a03:2880:f12c:83:face:b00c:0:25de",
            "dstport": "443",
            "srcport": "51648",
            "ip_version": "6"
          }
        ],
        [
          11,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "FF00001D"
          }
        ],
        [
          33775,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "c4ff00001d087de6f2c9f2d4ef940867ed8a60434e91f40044b6040b56e422..."
          }
        ],
        [
          33780,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "FF00001D"
          }
        ],
        [
          34469,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "caff00001d087de6f2c9f2d4ef940867ed8a60434e91f40044b652dc12659e..."
          }
        ],
        [
          35183,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Handshake",
              "payload_length": "191"
            },
            "raw": "efff00001d087de6f2c9f2d4ef940867ed8a60434e91f440b65b2c8e223600..."
          }
        ],
        [
          35324,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          35330,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          35349,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457798",
              "type": "Short",
              "payload_length": "18"
            },
            "raw": "5c7de6f2c9f2d4ef9441b5b9fdbe811bf48ec0542f02822fc9c04f26eac3f2"
          }
        ],
        [
          35357,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Short",
              "payload_length": "47"
            },
            "raw": "527de6f2c9f2d4ef940bf767c99d969d77fbab1d3e67b6ea8d5a9a25722d69"
          }
        ],
        [
          68898,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457799",
              "type": "Handshake",
              "payload_length": "31"
            },
            "raw": "edff00001d087de6f2c9f2d4ef940867ed8a60434e91f44016cd4f5c4289e3"
          }
        ],
        [
          68970,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ],
            "header": {
              "packet_number": "3457800",
              "type": "Short",
              "payload_length": "20"
            },
            "raw": "4e7de6f2c9f2d4ef94d151f47ea3ddbf2954791c8312f94b6028d9e50b9528"
          }
        ],
        [
          69180,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "3457801",
              "type": "Short",
              "payload_length": "250"
            },
            "raw": "5c7de6f2c9f2d4ef94ef6676d6986bbb67b175a41de2d190462a92b475a658..."
          }
        ],
        [
          215344,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3457802",
              "type": "Short",
              "payload_length": "582"
            },
            "raw": "557de6f2c9f2d4ef9469fbf0dee65e74821d21e68ab098beb08ef275976450..."
          }
        ]
      ],
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "vantagepoint": "NETWORK"
    },
    {
      "starttime": 85805120161831,
      "qlog_version": "0.1",
      "connectionid": "4D99C32ECEB46982",
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "srcip": "::",
            "dstip": "2a03:2880:f12c:83:face:b00c:0:25de",
            "dstport": "443",
            "srcport": "51648",
            "ip_version": "6"
          }
        ],
        [
          2139,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "FF00001D"
          }
        ],
        [
          37048,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "ceff00001d084d99c32eceb469820867ed8a6a3d5327060044b6092235e52f..."
          }
        ],
        [
          37054,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "FF00001D"
          }
        ],
        [
          37178,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "PADDING"
              },
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Initial",
              "payload_length": "1216"
            },
            "raw": "c6ff00001d084d99c32eceb469820867ed8a6a3d5327060044b6e8b33864e2..."
          }
        ],
        [
          37836,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Handshake",
              "payload_length": "1216"
            },
            "raw": "eeff00001d084d99c32eceb469820867ed8a6a3d53270644b7cedef0ea96ee..."
          }
        ],
        [
          38069,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Handshake",
              "payload_length": "1216"
            },
            "raw": "e7ff00001d084d99c32eceb469820867ed8a6a3d53270644b766fadfced390..."
          }
        ],
        [
          38300,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133724",
              "type": "Handshake",
              "payload_length": "808"
            },
            "raw": "e0ff00001d084d99c32eceb469820867ed8a6a3d532706431f3d6b94b9079d..."
          }
        ],
        [
          38668,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          38668,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate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
          }
        ],
        [
          38928,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          38963,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "12133722",
              "type": "Short",
              "payload_length": "48"
            },
            "raw": "414d99c32eceb46982363a547ee5b3cb52266c620601ce1045f2aa31ba8675..."
          }
        ],
        [
          72558,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133725",
              "type": "Handshake",
              "payload_length": "31"
            },
            "raw": "efff00001d084d99c32eceb469820867ed8a6a3d5327064016e2a99236724d"
          }
        ],
        [
          72620,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "HANDSHAKE_DONE"
              }
            ],
            "header": {
              "packet_number": "12133723",
              "type": "Short",
              "payload_length": "19"
            },
            "raw": "4a4d99c32eceb46982d5b2742da669f572e19b30585f308d394833a14a5adb"
          }
        ],
        [
          72953,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "CRYPTO"
              }
            ],
            "header": {
              "packet_number": "12133724",
              "type": "Short",
              "payload_length": "251"
            },
            "raw": "414d99c32eceb46982d399d4705592afdf6165b090a1b093f31aa2915437df..."
          }
        ],
        [
          82529,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "header": {
              "packet_number": "4611686018427387904",
              "type": "Handshake",
              "payload_length": "49"
            },
            "raw": "e6ff00001d084d99c32eceb469820867ed8a6a3d5327064018f7e4bc82991e"
          }
        ],
        [
          82564,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133725",
              "type": "Short",
              "payload_length": "20"
            },
            "raw": "5b4d99c32eceb469823498af6fc3ee258844c492e566e8dd665761594ec537"
          }
        ],
        [
          168402,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "12133726",
              "type": "Short",
              "payload_length": "578"
            },
            "raw": "454d99c32eceb469820b41bd4d983c200d4750608b0cbb298632ef54597cc4..."
          }
        ]
      ],
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ],
      "vantagepoint": "NETWORK"
    }
  ],
  "description": "www.facebook.com"
}

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.facebook.com

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.