TCP SYN (p0f)

6:106+22:0:1440:65535,8:mss,nop,ws,nop,nop,sok:ecn,flow:0

first seen 2026-09-28 13:53 · last seen 2026-10-13 10:30 · 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 version6
Initial TTL106+22
Options length0
MSS1440
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksecn,flow
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
t13d201100_2b729b4bf6f3_36bf25f296df3

HTTP request (JA4H)

fingerprintco-occurrences
he11nn020000_d5c75abc5c2c_000000000000_0000000000003

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_83

Country

fingerprintco-occurrences
AT · Austria3

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation3