TCP SYN (p0f)

4:43+21:0:1452:65535,8:mss,nop,ws,sok,ts:df,id+,ecn:0

first seen 2026-07-25 07:10 · last seen 2026-07-25 15:29 · JSON

Decomposed attributes

IP version4
Initial TTL43+21
Options length0
MSS1452
Window size65535
Window scale8
Options layoutmss,nop,ws,sok,ts
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
t13d181100_85036bcba153_d41ae481755e2
t13d2013h1_2b729b4bf6f3_e24568c0d4401

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_08e7224bf8c7_000000000000_0000000000002
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-4-8_1452_83

User-Agent

fingerprintco-occurrences
Mozilla/5.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.01

Country

fingerprintco-occurrences
VN · Vietnam3

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp3