Masscan vs Port Authority

Masscan is a free command-line TCP port scanner for scanning many machines across wide address ranges. The project says one machine can transmit 10 million packets per second. It supports asynchronous transmission, arbitrary port and address ranges, and scanning IPv4 and IPv6 together without a separate IPv6 mode. Banner checks cover protocols and services including FTP, HTTP, IMAP4, memcached, POP3, SMTP, SSH, SSL, SMBv1, SMBv2, Telnet, RDP and VNC. Results can be saved as XML, binary, grepable, JSON or list output. Its usage and output are intended to be familiar to Nmap users, with some Nmap-compatible options. Masscan runs on Linux, macOS and Windows and is available for self-hosting. The project describes PF_RING DNA support for high-speed transmission and says it can use PF_RING ZC when the adapter name indicates it. It is free software under the GNU Affero General Public License version 3, whose notice states there is no warranty. Users must specify ports and target IP addresses or simple ranges; DNS names are not accepted. The README warns that its custom TCP/IP stack can conflict with the local stack and describes using a separate source IP or firewalling its source port.

Port Authority is a free Android port scanner for discovering network hosts and viewing network information. It discovers LAN hosts and public IP addresses, then scans TCP ports on LAN and WAN hosts with custom ranges. Network tools include MAC-address vendor detection, DNS record lookups, and Wake-on-LAN for local hosts. Lightweight SSH and HTTP(S) fingerprinting identifies server type and version. The maker describes host discovery as typically taking less than five seconds and scans as heavily threaded. The app says it has no ads or analytics trackers and does not track, collect, or share data. It requires limited permissions for network interaction. Public IP detection uses the maker’s open-source stateless service. The free app is GPL-3.0 licensed; a 4.99 USD once donation plan has the same features.