TCP SYN (p0f)

4:112+16:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-13 12:50 · last seen 2026-08-20 17:55 · 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 TTL112+16
Options length0
MSS1460
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
t12d260800_db6bc8f7861c_0fd084b116a91
t13d181100_85036bcba153_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_e435c873d8ad_000000000000_0000000000001
ge11nn06enus_98e697c2fa06_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.361
CMS-Security-Auditor/1.0 (+authorized self-check; contact: local-admin)1

Country

fingerprintco-occurrences
DE · Germany1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS9506 · Singtel Fibre Broadband1
AS207043 · DEDIK SERVICES LIMITED1