TCP SYN (p0f)

4:43+21:0:1460:65535,8:mss,sok,ws,eol+2:df,id+:0

first seen 2026-08-29 16:46 · last seen 2026-08-29 16:46 · JSON

Decomposed attributes

IP version4
Initial TTL43+21
Options length0
MSS1460
Window size65535
Window scale8
Options layoutmss,sok,ws,eol+2
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
t13d1515h1_8daaf6152771_0a20fe35d3a51

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-3-0-0-0_1460_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
PT · Portugal1

Network (ASN)

fingerprintco-occurrences
AS13156 · NOWO COMMUNICATIONS, S.A.1