jfscan
Wrapper tool combining Masscan's high-speed port scanning with Nmap's service fingerprinting. Accepts diverse target formats (domains, IPs, CIDRs, URLs) and outputs domain:port pairs suitable for piping into vulnerability scanners like Nuclei or httpx.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Security tool, not a secure service. Requires elevated privileges (CAP_NET_RAW). Archived repo means no security patches. External dependencies (Masscan, Nmap) are well-maintained independently. No network service exposed.
⚡ Reliability
Best When
You need to scan large network ranges quickly and feed results into downstream security tools.
Avoid When
You need an actively maintained tool (this is archived/deprecated), or you're scanning small ranges where Nmap alone is sufficient.
Use Cases
- • Large-scale port scanning across wide network ranges with service detection
- • Bug bounty reconnaissance combining speed (Masscan) with accuracy (Nmap)
- • Building automated security scanning pipelines with stdin/stdout chaining
- • Generating domain:port lists for subsequent web vulnerability testing
Not For
- • Small network scans where plain Nmap suffices
- • Non-security use cases — this is a penetration testing tool
- • Active development needs — project is archived and deprecated in favor of massmap (Go rewrite)
Interface
Authentication
No authentication. Local CLI tool requiring CAP_NET_RAW capability for raw packet operations.
Pricing
MIT licensed. Requires external tools (Masscan, optionally Nmap) which are also free.
Agent Metadata
Known Gotchas
- ⚠ ARCHIVED AND DEPRECATED — successor is massmap (Go rewrite)
- ⚠ Requires Masscan installed with CAP_NET_RAW capability set
- ⚠ Requires root/sudo or specific capabilities for raw socket operations
- ⚠ Output format is domain:port text, not structured JSON
- ⚠ False positives/negatives acknowledged by author for smaller ranges
Alternatives
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Scores are editorial opinions as of 2026-03-08.