TCP SYN (p0f)

4:55+9:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-02 03:30 · last seen 2026-09-04 09:58 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL55+9
Options length0
MSS1460
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
t12d700700_b8b0f76b4bb5_4446390ac2244
t12d650700_0dd215169a35_4446390ac2243
t12d650800_0dd215169a35_1db689d966e82
t13d111300_9d3654eb36d2_a5b99884f7f51
t13d190900_9dc949149365_97f8aa674fd91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_17807bc4167d_000000000000_0000000000005
ge11nn050000_0b4164a3b800_000000000000_0000000000004
ge11nr030000_cd680697de12_000000000000_0000000000001
ge11nn040000_5913a3f80e25_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_711

User-Agent

fingerprintco-occurrences
python-requests/2.6.0 CPython/2.7.5 Linux/3.10.0-1160.119.1.el7.x86_643
libwww-perl/6.052
libwww-perl/6.832
Mozilla/5.01
PatchworkIngest/1.0 (+https://patchwork.example)1
python-requests/2.6.0 CPython/2.7.5 Linux/3.10.0-693.el7.x86_641
libwww-perl/6.771

Country

fingerprintco-occurrences
RO · Romania6
NL · Netherlands3
US · United States1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS47890 · UNMANAGED LTD6
AS49870 · Alsycon B.V.3
AS31898 · Oracle Corporation1
AS53850 · GorillaServers, Inc.1