TCP SYN (p0f)

4:115+13:0:1380:mss*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-09-06 15:24 · last seen 2026-09-06 21:58 · 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 TTL115+13
Options length0
MSS1380
Window sizemss*47
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
t13d181100_85036bcba153_d41ae481755e2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_5b1e8b5f4d2d_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-1-3-1-1-4_1380_82

User-Agent

fingerprintco-occurrences
Python-urllib/3.132

Country

fingerprintco-occurrences
FR · France2

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.2