TCP SYN (p0f)

4:41+23:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-27 18:20 · last seen 2026-08-27 18:20 · 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 TTL41+23
Options length0
MSS1410
Window sizemss*46
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

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn070000_ca40d4d1460e_000000000000_0000000000001
ge11nn050000_889622e8388c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_72

User-Agent

fingerprintco-occurrences
libredtail-http2

Country

fingerprintco-occurrences
CN · China2

Network (ASN)

fingerprintco-occurrences
AS141679 · China Telecom Beijing Tianjin Hebei Big Data Industry Park Branch2