常见的网络服务和对应端口
| 服务名称 | 端口号/协议 [别名] | #注释 |
| ftp-data | 20/tcp | #FTP, data |
| ftp | 21/tcp | #FTP. control |
| telnet | 23/tcp | |
| smtp | 25/tcp mail | #Simple Mail Transfer Protocol |
| time | 37/tcp timserver | |
| time | 37/udp timserver | |
| domain | 53/tcp | #Domain Name Server |
| domain | 53/udp | #Domain Name Server |
| tftp | 69/udp | #Trivial File Transfer |
| gopher | 70/tcp | |
| http | 80/tcp www www-http | #World Wide Web |
| pop3 | 110/tcp | #Post Office Protocol - Version 3 |
| nntp | 119/tcp usenet | #Network News Transfer Protocol |
| netbios-ns | 137/tcp nbname | #NETBIOS Name Service |
| netbios-ns | 137/udp nbname | #NETBIOS Name Service |
| netbios-dgm | 138/udp nbdatagram | #NETBIOS Datagram Service |
| netbios-ssn | 139/tcp nbsession | #NETBIOS Session Service |
| imap | 143/tcp imap4 | #Internet Message Access Protocol |
| snmp | 161/udp | #SNMP |
| snmptrap | 162/udp snmp-trap | #SNMP trap |
| irc | 194/tcp | #Internet Relay Chat Protocol |
| ipx | 213/udp | #IPX over IP |
| ldap | 389/tcp | #Lightweight Directory Access Protocol |
| https | 443/tcp MCom | |
| https | 443/udp MCom | |
| uucp | 540/tcp uucpd | |
| ldaps | 636/tcp sldap | #LDAP over SSL |
| doom | 666/tcp | #Doom Id Software |
| doom | 666/udp | #Doom Id Software |
| phone | 1167/udp | #Conference calling |
| ms-sql-s | 1433/tcp | #Microsoft-SQL-Server |
| ms-sql-s | 1433/udp | #Microsoft-SQL-Server |
| ms-sql-m | 1434/tcp | #Microsoft-SQL-Monitor |
| ms-sql-m | 1434/udp | #Microsoft-SQL-Monitor |
| wins | 1512/tcp | #Microsoft Windows Internet Name Service |
| wins | 1512/udp | #Microsoft Windows Internet Name Service |
| l2tp | 1701/udp | #Layer Two Tunneling Protocol |
| pptp | 1723/tcp | #Point-to-point tunnelling protocol |
| radius | 1812/udp | #RADIUS authentication protocol |
| radacct | 1813/udp | #RADIUS accounting protocol |
| nfsd | 2049/udp nfs | #NFS server |
| knetd | 2053/tcp | #Kerberos de-multiplexor |
| admin | 6000/tcp | #Winmail Server Admin |
| webmail | 6080/tcp | #Winmail Server Webmail |
| man | 9535/tcp | #Remote Man Server |