TCP SYN (p0f)

4:44+20:0:1410:mss*30,8:mss,sok,ts,nop,ws,?254::0

first seen 2026-06-23 09:27 · last seen 2026-09-28 08:05 · JSON

Decomposed attributes

IP version4
Initial TTL44+20
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.4
t13d3112h2_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.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn060000_3e7ded867bc2_000000000000_0000000000003
ge11nn050000_eb4e96aa336f_000000000000_0000000000001
ge20nn040000_b221e026a664_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
42300_2-4-8-1-3-254_1410_84

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)5

Country

fingerprintco-occurrences
RU · Russia5

Network (ASN)

fingerprintco-occurrences
AS13238 · YANDEX LLC5