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Network Security Scanner & Connectivity Monitor — rogue device detection, STP/BPDU, storm analysis, WiFi scanner, DNS logger, port scanner, MTR
5 starsPython
NetSentinel – a local network security scanner and connectivity monitor
by ossianericson·Jun 19, 2026·2 points·0 comments
AI Analysis
●●SolidSolve My ProblemDark HorseShip It
Detects rogue STP root bridges in a GUI when Wireshark is overkill.
Strengths
- •Consolidates five distinct diagnostic tools into a single cross-platform interface.
- •Specific STP/BPDU monitoring targets a painful, hard-to-diagnose network failure mode.
- •Proper package distribution via MS Store and winget reduces installation friction.
Weaknesses
- •Requires libpcap dependencies and sudo privileges for layer-two packet capture.
- •Competes with Wireshark and Nmap which offer deeper feature sets overall.
Category
Target Audience
Sysadmins, network engineers, homelabbers
Similar To
Wireshark · Advanced IP Scanner · Fing
Post Description
A Google Nest speaker was winning the STP root bridge election on my network and knocking out DNS every 45 seconds. Took five separate tools to find it.
I started NetSentinel one Sunday afternoon out of frustration. Thought I would be done the same evening. But I was off by about 2 months. Every time I hit a problem that lived in yet another tool, I just added it.
Available on Windows (MS Store), macOS and Linux.
Testers with different HW are welcome.
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