TCP SYN (p0f)

4:56+8:0:1460:65535,13:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-24 22:09 · last seen 2026-09-05 07:25 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL56+8
Options length0
MSS1460
Window size65535
Window scale13
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
t13d1312h2_a44d0ee8b3cc_e381dae6da6b4
t13d1311h2_a44d0ee8b3cc_485d6013ba691

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn18enus_f19a7ce03b58_000000000000_0000000000004
ge20nn100000_806fbb41f745_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:1;4:8388608;5:65536|8323073|0|m,s,a,p5

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_135

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:126.0) Gecko/20100101 Firefox/126.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.02
siteradar/0.1 contact: ops@example.com1

Country

fingerprintco-occurrences
US · United States5

Network (ASN)

fingerprintco-occurrences
AS13335 · Cloudflare, Inc.5