TCP SYN (p0f)

4:49+15:0:1265:mss*51,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-07 09:34 · last seen 2026-08-07 18:12 · JSON

Decomposed attributes

IP version4
Initial TTL49+15
Options length0
MSS1265
Window sizemss*51
Window scale10
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
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.4

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.4

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.4

TCP SYN (JA4T)

fingerprintco-occurrences
64515_2-4-8-1-3_1265_104

User-Agent

fingerprintco-occurrences
curl/8.21.04

Country

fingerprintco-occurrences
SE · Sweden4

Network (ASN)

fingerprintco-occurrences
AS39351 · 31173 Services AB4