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Address
Host

http3-test.litespeedtech.com

QUIC is not supported

HTTP3Check could not get the server's advertised QUIC versions due to the error given below.

HTTP over TCP request to server failed.

HTTP3Check failed to establish a QUIC connection for all attempts made with the given endpoint. See the connection errors below for more information.

Attempted 1 connection(s).
Received packets for 1 connection(s).
Successful handshake for 0 connection(s).
Q035 Q039 Q043 Q044 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.

8DCC46020C... 1.057

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.

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": "51322",
            "dstport": "4433",
            "srcip": "0.0.0.0"
          }
        ],
        [
          206,
          "CONNECTIVITY",
          "VERNEG",
          "LINE",
          {
            "proposed_version": "FAFAFAFA"
          }
        ],
        [
          1057,
          "TRANSPORT",
          "PACKET_RX",
          "LINE",
          {
            "header": {
              "packet_number": "4611686018427387904",
              "type": "Version Negotiation",
              "payload_length": "52"
            },
            "raw": "c0000000005b8dcc46020cb99e52190dc2ac9e33597a311d4c9c5efa513033"
          }
        ],
        [
          1068,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "supports_version": "Q035"
          }
        ],
        [
          1185,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "supports_version": "Q039"
          }
        ],
        [
          1272,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "supports_version": "Q043"
          }
        ],
        [
          1379,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "supports_version": "Q044"
          }
        ],
        [
          1465,
          "CONNECTIVITY",
          "VERNEG",
          "PACKET_RX",
          {
            "supports_version": "Q046"
          }
        ]
      ],
      "connectionid": "8DCC46020CB99E52",
      "qlog_version": "0.1",
      "vantagepoint": "NETWORK",
      "starttime": 25294292644924,
      "fields": [
        "time",
        "category",
        "type",
        "trigger",
        "data"
      ]
    }
  ],
  "description": "http3-test.litespeedtech.com"
}