Angry IP Scanner vs Naabu

Angry IP Scanner is a free, open-source desktop tool for scanning IP addresses and ports. It accepts address ranges, random addresses, or files in any format as scan input. The scanner checks whether hosts respond to pings and can optionally resolve hostnames, identify MAC addresses, and scan ports. It also supports NetBIOS information, favorite IP ranges, web server detection, and customizable openers. Java plugins can extend scanning and data gathering with fetchers, pingers, exporters, and feeders. Results can be saved as CSV, TXT, XML, or IP-Port list files, and a command-line interface is available. It runs on Linux, macOS, and Windows under GPLv2. The maker says installation is unnecessary and that the software can be copied and used anywhere. It is described as particularly useful to network administrators monitoring and managing networks. The FAQ notes that some antivirus vendors have flagged the older ipscan.exe, while saying version 3.x is not detected.

Naabu is a free, open-source command-line port scanner for identifying valid ports on hosts, with SYN, CONNECT, and UDP probes. It accepts hosts, IP addresses, CIDR ranges, and ASNs directly, from a file, or through standard input. Results can be emitted as JSON, CSV, text, or standard output. It supports IPv4 and experimental IPv6 scanning, DNS port scans, passive enumeration through Shodan InternetDB, and experimental host discovery. Naabu can work with Nmap for service discovery and version detection, and discovered ports can be piped to ProjectDiscovery's httpx to identify running HTTP servers. The CLI can upload or display scan results in the ProjectDiscovery Cloud dashboard. Installation options include ready-to-run binaries, Docker, and Go. Packet capture requires libpcap on Linux or macOS, or Npcap on Windows. Service version detection needs a local Nmap service-probe database or a custom path. The README recommends running as root for best results and adjusting scan flags and rate on local systems.