TCP SYN (p0f)

6:235+20:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:ecn,flow:0

first seen 2026-08-29 21:48 · last seen 2026-08-29 21:48 · JSON

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version6
Initial TTL235+20
Options length0
MSS1440
Window sizemss*45
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksecn,flow
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
t12d4907h1_730fb1b0ac6a_8587f467d9ea1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07enus_1219f1348bb2_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-3-1-1-4_1440_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.01

Country

fingerprintco-occurrences
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.1