TCP SYN (p0f)

4:43+21:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-09-07 14:02 · last seen 2026-09-07 14:02 · 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 TTL43+21
Options length0
MSS1460
Window sizemss*29
Window scale11
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
t13d131300_f57a46bbacb6_fb48f8b98a291

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05enus_1837273ddbac_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_111

User-Agent

fingerprintco-occurrences
SofyaBot/1.0 (+https://sofya.co/bot)1

Country

fingerprintco-occurrences
AT · Austria1

Network (ASN)

fingerprintco-occurrences
AS197540 · netcup GmbH1