TCP SYN (p0f)

4:41+23:0:1360:mss*48,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-25 11:36 · last seen 2026-06-25 11:36 · JSON

Decomposed attributes

IP version4
Initial TTL41+23
Options length0
MSS1360
Window sizemss*48
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
t13d491200_bd868743f55c_7c76daad20ec1
t13d3112h2_e8f1e7e78f70_6bebaf5329ac Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0.The fingerprint page shows the full measured match list. More on the catalog.1
t13d311100_1d947a95fc68_b72e173852fa1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn060000_f22d4dcb7482_000000000000_0000000000001
ge11nn060000_d13894064a59_000000000000_0000000000001
he20cr07enus_3c34c2a3e1d9_55a15b6e0024_7439440d66fb1

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, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1

User-Agent

fingerprintco-occurrences
SiteCheckerBotCrawler/1.0 (+http://sitechecker.pro)2
Linux / Firefox 29: Mozilla/5.0 (X11; Linux x86_64; rv:29.0) Gecko/20100101 Firefox/29.01

Country

fingerprintco-occurrences
DE · Germany3

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH3