TCP SYN (p0f)

4:49+15:0:1412:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-10-11 07:23 · last seen 2026-10-11 07:23 · JSON

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version4
Initial TTL49+15
Options length0
MSS1412
Window sizemss*20
Window scale7
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
t13d190900_9dc949149365_97f8aa674fd91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
28240_2-4-8-1-3_1412_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4 240.111 Safari/537.361

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED1