TCP SYN (p0f)

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

first seen 2026-08-29 09:56 · last seen 2026-08-29 14:20 · 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

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::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

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

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

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.2277.112
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.6400.0 Safari/537.36
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.5999.0 Safari/537.36
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWe…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6212.0 Safari/537.36
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

4:44+20:0:1360:mss*44,7:mss,sok,ts,nop,ws::0

Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/…

User-Agent claims Windows

TCP SYN initial TTL 44+20 indicates Unix-like

Full User-Agent	Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.47 Safari/537.36
Observed TTL	44+20 (observed + path distance → initial)
Claimed OS	Windows
Confidence	low — single sighting of an environmental signal

low

2026-08-29

Distinct clients per day (last 30 days, peak 3/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 version	`4`
Initial TTL	`44+20`
Options length	`0`
MSS	`1360`
Window size	`mss*44`
Window scale	`7`
Options layout	`mss,sok,ts,nop,ws`
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
`t13d131100_f57a46bbacb6_e5728521abd4`	12

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nr17enus_9f4f72c36cf0_000000000000_000000000000`	9
`ge11nr16enus_73e9eec732a9_000000000000_000000000000`	3

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1360_7`	12

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`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Edge/123.0.2420.0 Safari/537.36`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15`	1
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.2277.112`	1
`Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.6400.0 Safari/537.36`	1
`Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.5999.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15`	1
`Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6212.0 Safari/537.36`	1
`Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.6167.47 Safari/537.36`	1

Country

fingerprint	co-occurrences
`NL` · Netherlands	12

Network (ASN)

fingerprint	co-occurrences
`AS202412` · Omegatech LTD	12