常用服務及端口
| 服務名稱 | 端口號/協議 | 別名 | 說明 |
| echo | 7/tcp | ? | ? |
| echo | 7/udp | ? | ? |
| discard | 9/tcp | sink null | ? |
| discard | 9/udp | sink null | ? |
| systat | 11/tcp | users | #Active users |
| daytime | 13/tcp | ? | ? |
| daytime | 13/udp | ? | ? |
| qotd | 17/tcp | quote | #Quote of the day |
| qotd | 17/udp | quote | #Quote of the day |
| chargen | 19/tcp | ttytst source | #Character generator |
| chargen | 19/udp | ttytst source | #Character generator |
| ftp-data | 20/tcp | ? | #FTP, data |
| ftp | 21/tcp | ? | #FTP, control |
| telnet | 23/tcp | ? | ? |
| smtp | 25/tcp | #Simple Mail Transfer Protocol | |
| time | 37/tcp | Timserver | ? |
| time | 37/udp | Timserver | ? |
| rlp | 39/udp | resource | #Resource Location Protocol |
| nameserver | 42/tcp | name | #Host Name Server |
| nameserver | 42/udp | name | #Host Name Server |
| nicname | 43/tcp | Whois | ? |
| domain | 53/tcp | ? | #Domain Name Server |
| domain | 53/udp | ? | #Domain Name Server |
| bootps | 67/udp | dhcps | #Bootstrap Protocol Server |
| bootpc | 68/udp | dhcpc | #Bootstrap Protocol Client |
| tftp | 69/udp | ? | #Trivial File Transfer |
| gopher | 70/tcp | ? | ? |
| finger | 79/tcp | ? | ? |
| http | 80/tcp | www www-http | #World Wide Web |
| kerberos | 88/tcp | Krb5 kerberos-sec | #Kerberos |
| kerberos | 88/udp | Krb5 kerberos-sec | #Kerberos |
| hostname | 101/tcp | hostnames | #NIC Host Name Server |
| iso-tsap | 102/tcp | ? | #ISO-TSAP Class 0 |
| rtelnet | 107/tcp | ? | #Remote Telnet Service |
| pop2 | 109/tcp | postoffice | #Post Office Protocol – Version 2 |
| pop3 | 110/tcp | ? | #Post Office Protocol – Version 3 |
| sunrpc | 111/tcp | Rpcbind portmap | #SUN Remote Procedure Call |
| sunrpc | 111/udp | Rpcbind portmap | #SUN Remote Procedure Call |
| auth | 113/tcp | Ident tap | #Identification Protocol |
| uucp-path | 117/tcp | ? | ? |
| nntp | 119/tcp | usenet | #Network New Transfer Protocol |
| ntp | 123/udp | ? | #Network Time Protocol |
| epmap | 135/tcp | Loc-srv | #DCE endpoint resolution |
| epmap | 135/udp | Loc-srv | #DCE endpoint resolution |
| 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 |
| pcmail-srv | 158/tcp | ? | #PCMail Server |
| snmp | 161/udp | ? | #SNMP |
| snmptrap | 162/udp | Snmp-trap | #SNMP trap |
| print-srv | 170/tcp | ? | #Network PostScript |
| bgp | 179/tcp | ? | #Border Gateway Protocol |
| 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 | ? |
| microsoft-ds | 445/tcp | ? | ? |
| microsoft-ds | 445/udp | ? | ? |
| kpasswd | 464/tcp | ? | # Kerberos (v5) |
| kpasswd | 464/udp | ? | # Kerberos (v5) |
| isakmp | 500/udp | ike | #Internet Key Exchange |
| exec | 512/tcp | ? | #Remote Process Execution |
| biff | 512/udp | comsat | ? |
| login | 513/tcp | ? | #Remote Login |
| who | 513/udp | whod | ? |
| cmd | 514/tcp | shell | ? |
| syslog | 514/udp | ? | ? |
| printer | 515/tcp | spooler | ? |
| talk | 517/udp | ? | ? |
| ntalk | 518/udp | ? | ? |
| efs | 520/tcp | ? | #Extended File Name Server |
| router | 520/udp | Route routed | ? |
| timed | 525/udp | timeserver | ? |
| tempo | 526/tcp | newdate | ? |
| courier | 530/tcp | rpc | ? |
| conference | 531/tcp | chat | ? |
| netnews | 532/tcp | readnews | ? |
| netwall | 533/udp | ? | #For emergency broadcasts |
| uucp | 540/tcp | uucpd | ? |
| klogin | 543/tcp | ? | #Kerberos login |
| kshell | 544/tcp | krcmd | #Kerberos remote shell |
| new-rwho | 550/udp | new-who | ? |
| remotefs | 556/tcp | rfs rfs_server | ? |
| rmonitor | 560/udp | rmoitord | ? |
| monitor | 561/udp | ? | ? |
| ladps | 636/tcp | sldap | #LDAP over TLS/SSL |
| doom | 666/tcp | ? | #Doom Id Software |
| doom | 666/udp | ? | #Doom Id Software |
| kerberos-adm | 749/tcp | ? | #Kerberos administration |
| kerberos-adm | 749/udp | ? | #Kerberos administration |
| kerberos-iv | 750/udp | ? | #Kerberos version IV |
| kpop | 1109/tcp | ? | #Kerberos POP |
| 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 |
| ingreslock | 1524/tcp | ingres | ? |
| 12tp | 1701/udp | ? | #Layer Two Tunneling Protocol |
| pptp | 1723/tcp | ? | #Point-to-point tunneling 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 |
| man | 9535/tcp | ? | #Remote Man Server |
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