TCP SYN (p0f)

4:37+27:0:1410:mss*30,8:mss,sok,ts,nop,ws,?254::0

first seen 2026-06-23 09:27 · last seen 2026-09-21 23:37 · JSON

Decomposed attributes

IP version4
Initial TTL37+27
Options length0
MSS1410
Window sizemss*30
Window scale8
Options layoutmss,sok,ts,nop,ws,?254
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
t13d3112h1_e8f1e7e78f70_8d633dac7124 Match?Exact match in Thumbprint's published controlled catalog captures: curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.7

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn060000_3e7ded867bc2_000000000000_0000000000005
ge11nn050000_eb4e96aa336f_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
42300_2-4-8-1-3-254_1410_85

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)7

Country

fingerprintco-occurrences
RU · Russia7

Network (ASN)

fingerprintco-occurrences
AS13238 · YANDEX LLC7