TCP SYN (p0f)

4:43+21:0:1412:mss*46,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-13 16:39 · last seen 2026-07-13 16:39 · JSON

Decomposed attributes

IP version4
Initial TTL43+21
Options length0
MSS1412
Window sizemss*46
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d1911h2_9dc949149365_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr010000_73b42ef9ea4d_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64952_2-4-8-1-3_1412_91

Country

fingerprintco-occurrences
CN · China1

Network (ASN)

fingerprintco-occurrences
AS58466 · CHINANET Guangdong province network1