TCP SYN (p0f)

4:48+16:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:id-:0

first seen 2026-06-29 23:17 · last seen 2026-09-01 00:57 · JSON

Matches controlled captures

Known clients driven through this site's own edge produced this exact fingerprint — measured truth, not inference. catalog →

safari 26.5.2 · macOS 26.5.2 · ci — 1 session, last 2026-09-01 00:57 controlled
safari 26.5.2 · macOS 15.7.7 · ci — 1 session, last 2026-08-18 10:12 controlled
safari 26.5 · macOS 15.7.7 · ci — 2 sessions, last 2026-07-02 03:04 controlled
firefox 152.0.1 · macOS 15.7.7 · ci — 1 session, last 2026-07-01 01:03 controlled
chrome 149.0.7827.156 · macOS 15.7.7 · ci — 1 session, last 2026-07-01 00:59 controlled

TCP SYN signatures from container or CI runners reflect the capture environment's kernel and network path, not the named client — the layers above (TLS, HTTP/2, HTTP) are the client's own.

Decomposed attributes

IP version	`4`
Initial TTL	`48+16`
Options length	`0`
MSS	`1460`
Window size	`65535`
Window scale	`6`
Options layout	`mss,nop,ws,nop,nop,ts,sok,eol+1`
Quirks	`id-`
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
`t13d2014h2_a09f3c656075_14788d8d241b`	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr05engb_f3a6f3dcb3d2_000000000000_000000000000`	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`4:2097152;3:100\|10485760\|0\|m,s,p,a`	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1460_6`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 15_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6 Mobile/15E148 Safari/604.1`	2

Country

fingerprint	co-occurrences
`AU` · Australia	2

Network (ASN)

fingerprint	co-occurrences
`AS15830` · Equinix (EMEA) Acquisition Enterprises B.V.	2