Use -T3 or -T2 on fragile / rate-limited targets. Prefer -Pn when ICMP is blocked.
Current Step
Network discovery and service fingerprinting after subdomain / IP list is ready.
Next Step
Pipe open ports into httpx or nuclei. Feed live hosts into masscan for large-scale follow-up.
Errors Fixes
Permission denied on raw sockets → run with sudo or switch to -sT TCP connect scan.
Host appears down / filtered → add -Pn to skip host discovery.
Rate limited by ISP or WAF → lower timing to -T2 or -T3, add --max-rate 100.
Scripts missing → install nmap-scripts package or reinstall nmap.
1---2name: nmap-23description: nmap4---5# nmap67## Repo8https://nmap.org 9https://github.com/nmap/nmap1011## Installation12```bash13# Debian / Kali / Ubuntu14sudo apt update && sudo apt install -y nmap1516# From source17git clone https://github.com/nmap/nmap.git18cd nmap19./configure20make21sudo make install22```2324## Using25```bash26# Host discovery27nmap -sn 192.168.1.0/242829# Service + default scripts30nmap -sV -sC -oA target target.com3132# Full TCP + OS detect33nmap -p- -sV -O -T4 target.com3435# Aggressive36nmap -A -T4 target.com3738# UDP top ports39nmap -sU --top-ports 100 target.com4041# Output formats42nmap -sV -oX target.xml -oN target.nmap target.com43```4445## Real-time usage (typical)46| Scope | Duration | Notes |47|-------|----------|-------|48| Single host top 1000 | 30s – 2 min | -T4 -sV |49| Single host full TCP | 5 – 25 min | -p- depends on filter |50| /24 network discovery | 1 – 5 min | -sn |51| 50 hosts service scan | 10 – 40 min | parallel with -iL |5253Use -T3 or -T2 on fragile / rate-limited targets. Prefer -Pn when ICMP is blocked.5455## Current Step56Network discovery and service fingerprinting after subdomain / IP list is ready.5758## Next Step59Pipe open ports into httpx or nuclei. Feed live hosts into masscan for large-scale follow-up.6061## Errors Fixes62- Permission denied on raw sockets → run with sudo or switch to -sT TCP connect scan.63- Host appears down / filtered → add -Pn to skip host discovery.64- Rate limited by ISP or WAF → lower timing to -T2 or -T3, add --max-rate 100.65- Scripts missing → install nmap-scripts package or reinstall nmap.
Run npx skillmds@latest add sameh1200/nmap-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.
nmap It is listed under Coding & Dev Tools on SkillMD.
This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: CAUTION, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.
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Sameh1200 (@sameh1200) published this skill. Their other Agent Skills are listed on their SkillMD profile.
Sameh1200