TCP SYN (p0f)

4:108+20:0:1436:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-08-18 09:09 · last seen 2026-08-18 09:09 · 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 TTL108+20
Options length0
MSS1436
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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_36bf25f296df2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_e6cc546c39dd_000000000000_0000000000001
ge11nn020000_14033e6fde61_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1436_82

Country

fingerprintco-occurrences
NL · Netherlands2

Network (ASN)

fingerprintco-occurrences
AS202412 · Omegatech LTD2