TCP SYN (p0f)

4:45+19:0:1380:mss*31,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-11 00:43 · last seen 2026-07-11 00:43 · JSON

Decomposed attributes

IP version4
Initial TTL45+19
Options length0
MSS1380
Window sizemss*31
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
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
t13d141000_cbb2034c60b8_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
po11nn040000_b9c176b8216c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42780_2-4-8-1-3_1380_92

User-Agent

fingerprintco-occurrences
Go-http-client/1.12

Country

fingerprintco-occurrences
NL · Netherlands2

Network (ASN)

fingerprintco-occurrences
AS34343 · BIP Backbone ASN2