TCP SYN (p0f)

4:57+7:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-12 15:29 · last seen 2026-08-19 06:03 · JSON

Distinct clients per day (last 30 days, peak 5/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 version4
Initial TTL57+7
Options length0
MSS1460
Window sizemss*29
Window scale9
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
t13d3515h1_8f004308c246_5c2c66f702b043
t13d351400_8f004308c246_5c2c66f702b07
t13i131000_f57a46bbacb6_e5728521abd41

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_a1c329e38462_000000000000_00000000000048
po11nn080000_86f5668e3d93_000000000000_0000000000002
ge11nn030000_042112399351_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_950

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Infrawatch/1.0; +https://infrawat.ch/)50
curl/7.61.11

Country

fingerprintco-occurrences
NL · Netherlands45
DE · Germany5
US · United States1

Network (ASN)

fingerprintco-occurrences
AS25369 · Hydra Communications Ltd50
AS14987 · Rethem Hosting LLC1