TCP SYN (p0f)

4:119+9:0:1460:62720,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-09-04 13:21 · last seen 2026-10-05 14:50 · 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 TTL119+9
Options length0
MSS1460
Window size62720
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
t13d1712h1_ab0a1bf427ad_882d495ac3813
t13d1813h1_85036bcba153_d339722ba4af1

HTTP request (JA4H)

fingerprintco-occurrences
po11nn060000_d8e0803a0d25_000000000000_0000000000001
ge11nr16enus_5a050224e10c_000000000000_0000000000001
ge11nr17enus_88d73aa4679e_000000000000_0000000000001
ge11nn16enus_be639a209d18_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
62720_2-1-3-1-1-4_1460_84

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
cve-2026-63030/1.01

Country

fingerprintco-occurrences
JP · Japan4

Network (ASN)

fingerprintco-occurrences
AS31898 · Oracle Corporation4