TCP SYN (p0f)

6:44+20:0:1440:mss*45,9:mss,sok,ts,nop,ws:flow:0

first seen 2026-08-01 09:52 · last seen 2026-08-01 09:52 · JSON

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

6:44+20:0:1440:mss*45,9:mss,sok,ts,nop,ws:flow:0

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

The initial TTL is set by the sending kernel (64 on Unix-like systems, 128 on Windows) and survives NAT. But VPNs, proxies and tunnels legitimately replace the sending stack, so this check never exceeds medium confidence.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-01

Decomposed attributes

IP version	`6`
Initial TTL	`44+20`
Options length	`0`
MSS	`1440`
Window size	`mss*45`
Window scale	`9`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`flow`
Payload class	`0`

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)

fingerprint	co-occurrences
`t13d3112h1_e8f1e7e78f70_d41ae481755e`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11cn06enus_aeac3047b50b_2e841494d698_41606f7ab262`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64800_2-4-8-1-3_1440_9`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`DE` · Germany	1

Network (ASN)

fingerprint	co-occurrences
`AS213520` · Senko Digital LLC	1