TCP SYN (p0f)

4:49+15:0:1380:mss*31,11:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-01 08:23 · last seen 2026-08-01 08:23 · JSON

Decomposed attributes

IP version4
Initial TTL49+15
Options length0
MSS1380
Window sizemss*31
Window scale11
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
t13d181000_5d04281c6031_78e6aca7449b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn080000_886c0477bc6e_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42780_2-4-8-1-3_1380_111

User-Agent

fingerprintco-occurrences
PostmanRuntime/7.51.11

Country

fingerprintco-occurrences
CN · China1

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE1