TCP SYN (p0f)

4:49+15:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0

first seen 2026-08-01 07:31 · last seen 2026-08-01 09:40 · JSON

Decomposed attributes

IP version4
Initial TTL49+15
Options length0
MSS1380
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf
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
t12d091100_08d6d9b33cd7_6d6c278f61f22
t13d2014h2_a09f3c656075_14788d8d241b1
t13d181000_5d04281c6031_78e6aca7449b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn060000_928b7c31c81a_000000000000_0000000000002
ge20nn05zhcn_eff5d0107a3f_000000000000_0000000000001
ge11nn080000_886c0477bc6e_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:2097152;3:100|10485760|0|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1380_64

User-Agent

fingerprintco-occurrences
Good3
PostmanRuntime/7.51.11

Country

fingerprintco-occurrences
CN · China4

Network (ASN)

fingerprintco-occurrences
AS4812 · China Telecom (Group)4