TCP SYN (p0f)

4:38+26:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 22:35 · last seen 2026-09-06 04:48 · 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 version4
Initial TTL38+26
Options length0
MSS1460
Window sizemss*20
Window scale7
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
t13i170900_5b57614c22b0_78e6aca7449b2
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_341eb0d8946c_000000000000_0000000000001
ge11nn070000_fd2827074311_000000000000_0000000000001
ge11nn050000_7c1f178bff36_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_73

User-Agent

fingerprintco-occurrences
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 (Silvy X Ran)1

Country

fingerprintco-occurrences
TH · Thailand2
CN · China1

Network (ASN)

fingerprintco-occurrences
AS136907 · HUAWEI CLOUDS2
AS134768 · CHINANET SHAANXI province Cloud Base network1