TCP SYN (p0f)

4:51+13:0:1380:mss*44,10:mss,sok,ts,nop,ws:df,id+,ecn:0

first seen 2026-07-01 14:41 · last seen 2026-07-01 14:41 · JSON

Decomposed attributes

IP version4
Initial TTL51+13
Options length0
MSS1380
Window sizemss*44
Window scale10
Options layoutmss,sok,ts,nop,ws
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
t13d491100_bd868743f55c_fa269c3d986d1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn100000_d871a5d9265f_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1380_101

User-Agent

fingerprintco-occurrences
LinkedInBot/1.0 (compatible; Mozilla/5.0; Apache-HttpClient +http://www.linkedin.com)1

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS40793 · LinkedIn Corporation1