TCP SYN (p0f)

4:38+26:0:1440:mss*44,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-19 08:14 · last seen 2026-06-19 08:14 · JSON

Decomposed attributes

IP version4
Initial TTL38+26
Options length0
MSS1440
Window sizemss*44
Window scale10
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
t13d2014h2_a09f3c656075_14788d8d241b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr08zhcn_2f332481d94c_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;3:100|10485760|1:0:0:255|m,s,p,a1

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.151

Country

fingerprintco-occurrences
CN · China1

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE1