Developer Reference, Instantly

:110 Port 110 (POP3) — What It Is and How to Use It :119 Port 119 (NNTP) — What It Is and How to Use It :123 Port 123 (NTP) — What It Is and How to Use It :143 Port 143 (IMAP) — What It Is and How to Use It :161 Port 161 (SNMP) — What It Is and How to Use It :194 Port 194 (IRC) — What It Is and How to Use It :20 Port 20 (FTP Data) — What It Is and How to Use It :21 Port 21 (FTP Control) — What It Is and How to Use It :22 Port 22 (SSH) — What It Is and How to Use It :23 Port 23 (Telnet) — What It Is and How to Use It :25 Port 25 (SMTP) — What It Is and How to Use It :389 Port 389 (LDAP) — What It Is and How to Use It :443 Port 443 (HTTPS) — What It Is and How to Use It :445 Port 445 (SMB) — What It Is and How to Use It :465 Port 465 (SMTPS) — What It Is and How to Use It :514 Port 514 (Syslog) — What It Is and How to Use It :53 Port 53 (DNS) — What It Is and How to Use It :67 Port 67 (DHCP Server) — What It Is and How to Use It :68 Port 68 (DHCP Client) — What It Is and How to Use It :80 Port 80 (HTTP) — What It Is and How to Use It