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

Address
Host

www.http3check.net

QUIC is supported

HTTP3Check 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
Q039 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.

5D69AA7C4C... 3.263 1.554
A26DAB87D2... 1.369 0.997

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: 8080
date: Sun, 15 Sep 2019 20:37:42 GMT
server: LiteSpeed
alt-svc: quic=":443"; ma=2592000; v="39,43,46", h3-22=":443"; ma=2592000

Certificate Chain

Domain *.http3check.net
Issued By Let's Encrypt Authority X3
Expires Tuesday, December 10, 2019 at 07:49:38 PM GMT
This certificate is valid
Subject
Common Name *.http3check.net
Issuer
Common Name Let's Encrypt Authority X3
Organization Let's Encrypt
Country US
Serial Number 344865169527139069690599711482393079582752
Signature Algorithm sha256WithRSAEncryption
Version
Public Key Bits 2048
Public Key Type RSA

Domain Let's Encrypt Authority X3
Issued By DST Root CA X3
Expires Wednesday, March 17, 2021 at 04:40:46 PM GMT
Subject
Common Name Let's Encrypt Authority X3
Organization Let's Encrypt
Country US
Issuer
Common Name DST Root CA X3
Organization Digital Signature Trust Co.
Serial Number 13298795840390663119752826058995181320
Signature Algorithm sha256WithRSAEncryption
Version
Public Key Bits 2048
Public Key Type RSA

Domain DST Root CA X3
Issued By DST Root CA X3
Expires Thursday, September 30, 2021 at 02:01:15 PM GMT
Subject
Common Name DST Root CA X3
Organization Digital Signature Trust Co.
Issuer
Common Name DST Root CA X3
Organization Digital Signature Trust Co.
Serial Number 91299735575339953335919266965803778155
Signature Algorithm sha1WithRSAEncryption
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": [
    {
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "dstip": "159.65.253.210",
            "ip_version": "4",
            "srcport": "55626",
            "dstport": "443",
            "srcip": "0.0.0.0"
          }
        ],
        [
          56,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "Q039"
          }
        ],
        [
          1554,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "1",
              "type": "Short",
              "payload_length": "1370"
            },
            "raw": "085d69aa7c4c08908001e89a67b42d8e667eede48c27800152454a00070000..."
          }
        ],
        [
          1555,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "Q039"
          }
        ],
        [
          1824,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "2",
              "type": "Short",
              "payload_length": "1370"
            },
            "raw": "085d69aa7c4c0890800207929c4d7a351b093ddf16eba40105420141b83cd3..."
          }
        ],
        [
          2024,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate": "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"
          }
        ],
        [
          2181,
          "SECURITY",
          "CHECK_CERT",
          "CERTLOG",
          {
            "certificate": "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"
          }
        ],
        [
          2453,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "3",
              "type": "Short",
              "payload_length": "28"
            },
            "raw": "085d69aa7c4c08908003ccab9d2113323c015a86d7f8400103e60100"
          }
        ],
        [
          3245,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "4",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "0c5d69aa7c4c089080a77f2321cc6b242deba4303a2902ee484022a2ff9147..."
          }
        ],
        [
          3263,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          3652,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              },
              {
                "frame_type": "STOP_WAITING"
              }
            ],
            "header": {
              "packet_number": "5",
              "type": "Short",
              "payload_length": "21"
            },
            "raw": "085d69aa7c4c0890800520ac886bb5431607b161fbfb23163cc76115421d37"
          }
        ],
        [
          3787,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "6",
              "type": "Short",
              "payload_length": "21"
            },
            "raw": "000605f219f310c939de9f6a137d00a5fd5a41657e6504948435371617119e"
          }
        ],
        [
          5742,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "7",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "1000074d455e37a9b9b1a006a738964f9f43e8e016d9c48c1697bf05fba6fd..."
          }
        ],
        [
          5898,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "8",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "100008ea25b26d08019bdb646d0bdcd4b9745a237b1de7d0f6a1c9952bd925..."
          }
        ],
        [
          6011,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "9",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "1000093bd79ce0e20502173a4748ca7952fe2a10078bab8ce7bd66383a51d0..."
          }
        ],
        [
          6135,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "10",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "10000ab306623eb7c431c93b6014f7255a734c7580bd5cdc89c61fe4d066d7..."
          }
        ],
        [
          6280,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "11",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "10000b3070b23bf6eb261e22690418c5f43dc29fc22f5111fb42737065a694..."
          }
        ],
        [
          6399,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "12",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "10000c531f1a64c7731faceadb663ccc40ca22e7bb738fb93e1fb9c3d6a175..."
          }
        ],
        [
          6504,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "13",
              "type": "Short",
              "payload_length": "114"
            },
            "raw": "10000d4451c4bba9311c8622fec461a8d3d2e4ed6c6e3767f2b1904560abc9..."
          }
        ]
      ],
      "connectionid": "5D69AA7C4C089080",
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "starttime": 30521981630752,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ]
    },
    {
      "events": [
        [
          0,
          "CONNECTIVITY",
          "NEW_CONNECTION",
          "LINE",
          {
            "dstip": "159.65.253.210",
            "ip_version": "4",
            "srcport": "55626",
            "dstport": "443",
            "srcip": "0.0.0.0"
          }
        ],
        [
          187,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "Q039"
          }
        ],
        [
          997,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "header": {
              "packet_number": "14",
              "type": "Short",
              "payload_length": "24"
            },
            "raw": "10000ec0050fd48169fed774a0872eef38cc603b5011a282"
          }
        ],
        [
          999,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "agreed_version": "Q039"
          }
        ],
        [
          1241,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "header": {
              "packet_number": "15",
              "type": "Short",
              "payload_length": "21"
            },
            "raw": "000faf2aeab668d4490a5b0dd6980a1736e4dc1fa1"
          }
        ],
        [
          1349,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              },
              {
                "frame_type": "PADDING"
              }
            ],
            "header": {
              "packet_number": "1",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "0ca26dab87d23a2395f83b4ff53edba403b33d0eb774390ca93fdcda66a4fb..."
          }
        ],
        [
          1369,
          "CONNECTIVITY",
          "HANDSHAKE",
          "PACKET_RX",
          {
            "status": "complete"
          }
        ],
        [
          1489,
          "RECOVERY",
          "RTT_UPDATE",
          "PACKET_RX",
          {
            "zero_rtt": "successful"
          }
        ],
        [
          1814,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "ACK"
              }
            ],
            "header": {
              "packet_number": "2",
              "type": "Short",
              "payload_length": "16"
            },
            "raw": "08a26dab87d23a239502fcd8f4ad19d1fa47f2e3a6026cb85199462e"
          }
        ],
        [
          1938,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "3",
              "type": "Short",
              "payload_length": "21"
            },
            "raw": "000376f5bb2306d62ce0f968b100643a968af0d37603c238d0499116ad7105"
          }
        ],
        [
          3311,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "4",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "100004a72d33f4b340ac4acc364f21eead8f77c44b73aa61d826d63a040c9d..."
          }
        ],
        [
          3429,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "5",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "10000508f81750357e86596770ed6d5fe1412c9ba5933b8eb0879ee75a668f..."
          }
        ],
        [
          3442,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "6",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "1000068f5e90eac6e986c2b17173917de77c39be1769b4ec24857d74341d55..."
          }
        ],
        [
          3450,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "7",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "100007beae50a40c15cac427e304ee505eff2907a7d23099c0726170c46ed4..."
          }
        ],
        [
          3457,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "8",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "100008e5c6debae283160e4fd8658e255db1ee1a98d76f37ef6fe2b82252e0..."
          }
        ],
        [
          3464,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "9",
              "type": "Short",
              "payload_length": "1358"
            },
            "raw": "1000096baa23b0787ace8696c5b7030d6183dd69bf1528790a9b5bda9e0000..."
          }
        ],
        [
          3472,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "frames": [
              {
                "frame_type": "STREAM"
              }
            ],
            "header": {
              "packet_number": "10",
              "type": "Short",
              "payload_length": "113"
            },
            "raw": "10000ad47d63e6e80e6c66b477d2f4689f3959c09e7834fa4a1ce4f1202c97..."
          }
        ]
      ],
      "connectionid": "A26DAB87D23A2395",
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "starttime": 30521981637679,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ]
    }
  ],
  "description": "www.http3check.net"
}