TCP SYN (p0f)

4:37+27:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-14 17:27 · last seen 2026-07-26 06:11 · JSON

Decomposed attributes

IP version4
Initial TTL37+27
Options length0
MSS1460
Window sizemss*20
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
t12d490600_730fb1b0ac6a_a1e9356827952
t13d191000_9dc949149365_e7c2852226511
t12d4906h1_730fb1b0ac6a_22a92d800fe41

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07zhcn_ad6bb88d6320_000000000000_0000000000002
ge11nn06zhcn_2d855731be57_000000000000_0000000000001
ge11nn020000_3ed38b250d3d_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_72

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11) AppleWebKit/601.1.27 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/601.1.272
Dalvik/2.1.0 (Linux; U; Android 9.0; ZTE BA520 Build/MRA58K)1
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.361

Country

fingerprintco-occurrences
CN · China4

Network (ASN)

fingerprintco-occurrences
AS58461 · CT HangZhou IDC2
AS4811 · China Telecom (Group)1
AS4134 · CHINANET BACKBONE1