| 7 | echo | TCP & UDP | Echo |
| 20 | ftp | TCP & UDP & SCTP | File transfer [Default Data] |
| 21 | ftp | TCP & UDP | File transfer [Control] |
| 22 | ssh | TCP & UDP & SCTP | THe Secure Shell (SSH) Protocol |
| 23 | telnet | TCP & UDP | Telnet |
| 25 | smtp | TCP & UDP | Simple Mail Transer |
| 53 | dns | TCP & UDP | Domain Name Server |
| 65 | tacacs-ds | TCP & UDP | TACACS-Database service |
| 66 | sql-net | TCP & UDP | Oracle SQL*NET |
| 67 | dhcp | TCP & UDP | DHCP Server |
| 68 | dhcp | TCP & UDP | DHCP Client |
| 69 | tftp | TCP & UDP | Trivial File Transfer |
| 80 | http | TCP & UDP | World Wide Web HTTP |
| 88 | kerberos | TCP & UDP | Kerberos |
| 110 | pop3 | TCP & UDP | Post Office Protocol - Version 3 |
| 115 | sftp | TCP & UDP | Simple File Transfer |
| 123 | ntp | TCP & UDP | Network Time Protocol |
| 135 | epmap | TCP & UDP | DCE endpoint resolution |
| 137 | netbios-ns | TCP & UDP | NETBIOS Name Service |
| 138 | netbios-dgm | TCP & UDP | NETBIOS Datagram Service |
| 139 | netbios-ssn | TCP & UDP | NETBIOS Session Service |
| 161 | snmp | TCP & UDP | SNMP |
| 162 | snmptrap | TCP & UDP | SNMPTRAP |
| 179 | bgp | TCP & UDP | Border Gateway Protocol |
| 389 | ldap | TCP & UDP | Lightweight Directory Access Protocol |
| 443 | https | TCP & UDP & SCTP | Http protocol over TLS/SSL |
| 445 | microsoft-ds | TCP & UDP | Microsoft-DS |
| 458 | appleqtc | TCP & UDP | Apple Quick Time |
| 464 | kpasswd | TCP & UDP | Kpasswd |
| 465 | igmpv3lite | UDP | IGMP over UDP for SSM |
| 500 | isakmp | TCP & UDP | ISAKMP |
| 514 | shell | TCP | cmd like exec, but automatic authentication is performed as for login server |
| 514 | syslog | UDP | Syslog server |
| 515 | printer | TCP & UDP | Spooler |
| 546 | dhvpv6-client | TCP & UDP | DHCPv6 Client |
| 547 | dhvpv6-server | TCP & UDP | DHCPv6 Server |
| 554 | rstp | TCP & UDP | Real Time Streaming Protocol |
| 563 | nntps | TCP & UDP | Nntp protocol over TLS/SSL (was snntp) |
| 631 | ipp | TCP & UDP | IPP(Internet Printing Protocol) |
| 631 | ipps | TCP & UDP | Internet Printing Protocol over HTTPS |
| 636 | ldaps | TCP & UDP | Idap protocol over TLS/SSL (was sldap) |
| 646 | ldp | TCP & UDP | LDP |
| 647 | dhcp-failover | TCP & UDP | DHCP Failover |
| 689 | nmap | TCP & UDP | NMAP |
| 694 | ha-cluster | TCP & UDP | HA-Cluster |
| 749 | kerberos-adm | TCP & UDP | Kerberos administration |
| 830 | netconf-ssh | TCP & UDP | NETCONF over SSH |
| 831 | netconf-beep | TCP & UDP | NETCONF over BEEP |
| 832 | netconfsoaphttp | TCP & UDP | NETCONF for SOAP over HTTPS |
| 833 | netconfsoapbeep | TCP & UDP | NETCONF for SOAP over BEEP |
| 847 | dhcp-failover2 | TCP & UDP | DHCP-Failover 2 |
| 853 | domain-2 | TCP | DNS query-response protocol run over TLS |
| 853 | domain-2 | UDP | DNS query-response protocol run over DTLS or QUIC |
| 873 | rsync | TCP & UDP | Rsync |
| 953 | rndc | TCP & UDP | BIND9 remote name daemon controller |
| 989 | ftps-data | TCP & UDP | FTP protocol data over TLS/SSL |
| 990 | ftps | TCP & UDP | FTP protocol control over TLS/SSL |
| 992 | telnets | TCP & UDP | Telnet protocol over TLS/SSL |
| 993 | imap s | TCP | IMAP over TLS protocol |
| 995 | pop3s | TCP | POP3 over TLS protocol |
| 995 | pop3s | UDP | POP3 protocol over TLS/SSL (was spop3) |
| 1433 | ms-sql-s | TCP & UDP | Microsoft-SQL-Server |
| 1433 | ms-sql-m | TCP & UDP | Microsoft-SQL-Monitor |
| 1718 | h323gatedisc | TCP & UDP | H.323 Multicast Gatekeeper Discover |
| 1719 | h323gatestat | TCP & UDP | H.323 Unicast Gatekeeper Signaling |
| 1720 | h323hostcall | TCP & UDP & SCTP | H.323 Call Control Signalling |
| 1812 | radius | TCP & UDP | RADIUS |
| 1813 | radius-acct | TCP & UDP | RADIUS Accounting |
| 3306 | mysql | TCP & UDP | MySql |
| 5060 | sip | TCP & UDP | SIP |
| 5061 | sips | TCP & UDP & SCTP | SIP-TLS |
| 8080 | https-alt | TCP & UDP | HTTP Alternate (see port 80) |
