Network Fingerprint Test

TCP SYN + HTTP Headers + Client Hints + Consistency · tcp.dimsky.ru · 2026-04-06 21:24:49 UTC

MSS = 1460
p0f: "Ethernet or modem" WiFi / Ethernet

Client Info

Client IP216.73.216.185
IP VersionIPv4
User-AgentMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Accept-LanguageN/A

Consistency Checks 0 passed, 1 failed

✘
TCP OS vs UA Platform: TCP top: Windows (75%), UA: Unknown
MISMATCH: UA says Unknown but TCP looks like Windows

TCP/IP Fingerprint

JA4T62727_2-4-8-3_1460_7
Satori62727:128:1:40:M1460,S,T,N,W7:.
Link Type (p0f)Ethernet or modem
Zardaxt OSWindows (75%), Linux (70%), Android (70%), FreeBSD (55%), macOS (45%), iOS (45%)

Estimated Params

MTU1500
Initial TTL128
Distance10 Hops
Server-measured RTT1.9 ms
Effective Window8029056 bytes (7.7 MB)
Theoretical Throughput33806.6 Mbps

Client Hints (HTTP Headers from Browser)

No Client Hints headers received (first request - reload to get full hints)

IPv4 Header

Type of Service0x00 (DSCP: Best Effort, ECN: Not-ECT)
Total Length60
IP FlagsDF
Time to Live118
Protocol6 (TCP)

TCP Header

Src Port46543
Data Offset10 (40 bytes)
Window Size62727
TCP OptionsMSS, SACK_PERM, TIMESTAMP, NOP, WINDOW

TCP Options Detail

Maximum Segment Size (MSS)
Kind: 2 · Length: 4
Value: 1460
SACK-Permitted (SACK_PERM)
Kind: 4 · Length: 2
Timestamps (TIMESTAMP)
Kind: 8 · Length: 10
TS Value: 2732269235, Echo: 0
No-Operation (NOP)
Kind: 1 · Length: 1
Window Scale (WINDOW)
Kind: 3 · Length: 3
Shift: 7, Multiplier: 128

Match: tcp_fingerprint --wifi

MSS1460   got 1460 ✔
Window65535   got 62727
WScale9   got 7
ToS0x00   got 0 ✔
TTL64   got 118
OptionsMSS,SACK_PERM,TIMESTAMP,NOP,WINDOW   got MSS, SACK_PERM, TIMESTAMP, NOP, WINDOW ✔

All HTTP Headers (8)

accept*/*
accept-encodinggzip, br, zstd, deflate
cache-controlmax-age=259200
connectionkeep-alive
hostdev.upakmarket.com
user-agentMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
via1.1 squid-proxy-5b5d847c96-lfmq4 (squid/6.13)
x-forwarded-for10.2.23.93

Raw SYN (60b)

45 00 00 3c 00 51 40 00 76 06 77 8f d8 49 d8 b9 d5 ab 06 2d b5 cf 00 50 61 14 bf a8 00 00 00 00 a0 02 f5 07 2d b1 00 00 02 04 05 b4 04 02 08 0a a2 db 1e b3 00 00 00 00 01 03 03 07
Reload JSON