TCP SYN (p0f)

4:44+20:0:1330:mss*49,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-18 13:53 · last seen 2026-10-31 17:38 · JSON

Last 7 days (1 observations)

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 TTL44+20
Options length0
MSS1330
Window sizemss*49
Window scale10
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
t12d860600_e18388e7f3a3_a1e93568279513

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06enus_ff6fe191b79d_000000000000_00000000000013

TCP SYN (JA4T)

fingerprintco-occurrences
65170_2-4-8-1-3_1330_1013

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.3613

Country

fingerprintco-occurrences
FR · France13

Network (ASN)

fingerprintco-occurrences
AS9009 · M247 Europe SRL13

TLS supported groups

fingerprintco-occurrences
0017,0019,001c,001b,0018,001a,0016,000e,000d,000b,000c,0009,000a2