TCP SYN (p0f)

4:45+19:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 10:10 · last seen 2026-07-29 06:04 · JSON

Decomposed attributes

IP version4
Initial TTL45+19
Options length0
MSS1412
Window sizemss*23
Window scale7
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
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.7

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr050000_3658ef221638_000000000000_0000000000007

TCP SYN (JA4T)

fingerprintco-occurrences
32476_2-4-8-1-3_1412_77

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; foda-scanner/0.1)7

Country

fingerprintco-occurrences
HK · Hong Kong SAR China7

Network (ASN)

fingerprintco-occurrences
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED7