Member Avatar for hasarin.fareeth

Hai.... I'm a final year BTech student interested in doing online port scanner.But i Didn't have any knowledge on that...... Please help me...

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For a project like this there are three practical areas to focus on: the scanning engine (how probes are sent and results interpreted), the web/UX and storage layer (how scans are scheduled, presented, and recorded), and the operational/legal rules you must follow.

As has C# skills, a sensible incremental approach is: build a small proof-of-concept that does asynchronous TCP connect checks (no raw packets needed), record results with timestamps, then extend to banner grabs for basic service identification. More advanced techniques (SYN-style scans, reliable UDP probing, OS/version detection) require packet injection and capture libraries plus elevated privileges, and they are far more complex to implement correctly. Scale by using a bounded worker pool, timeouts, per-target rate limits, and careful retry/backoff to avoid resource exhaustion and noisy scans.

Operational cautions are critical. As warned, indiscriminate scanning will trigger intrusion detection, cause complaints, and can get IPs or accounts suspended. Obtain explicit permission before scanning third-party networks, use isolated lab networks or consenting hosts for development, include contact info and rate limits if offering a public service, and keep detailed logs for troubleshooting and accountability. As suggested, study established open-source scanners to learn how they handle corner cases, but do so only in a controlled, legal environment.

Next step: build a controlled POC against machines you own, instrument metrics (latency, false-negative rate), then iterate features (concurrency, banner parsing, result storage) while keeping strict operational safeguards.

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Member Avatar for Salem

So what do you have knowledge of?

Member Avatar for hasarin.fareeth

Hai,
I'm having knowledge abt the C#.net concepts and coding... But I need details regarding Online Port Scanner... How it works.....

Member Avatar for jwenting

it works by annoying the living daylights out of people and getting whoever uses it kicked off the network.

Member Avatar for Salem

You could try putting a nice GUI front-end to nmap
Or grab the source and get real comfortable for a long reading session.

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