List of Important Network Ports
Service Name and Transport Protocol Port 20, 21 File Transfer Protocol (FTP) TCP 22 Secure Shell (SSH) TCP and UDP 23 Telnet TCP 25 Simple Mail Transfer Protocol (SMTP) TCP 50, 51 IPSec 53 Domain Name Server (DNS) TCP and UDP 67, 68 Dynamic Host Configuration Protocol (DHCP) UDP 69 Trivial File Transfer Protocol (TFTP) […]
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