Property
udp
Network stack fingerprint of the IP, collected from the UDP response to the crawler's request. UDP headers carry less information than TCP headers so the fingerprint is better at telling apart families of operating systems than versions.
| Property Name | Type | Description | Required |
|---|---|---|---|
| fp | string | Versioned, human-readable fingerprint key built from the "raw" headers in the format "u1_<initial TTL>_<quirks>". The property is missing if the headers couldn't be parsed. Ex: u1_64_df | |
| raw | string | Hex-encoded IP and UDP headers of the response, without the IP addresses and ports. Contains the IP header fields up to the source address followed by the UDP length and checksum. Ex: 4500004c2c6440004011f1df00381ca7 | Yes |
↑ TopExample
{
"raw": "4500004c2c6440004011f1df00381ca7",
"fp": "u1_64_df"
}