{"id":573,"date":"2026-09-11T10:30:46","date_gmt":"2026-09-11T09:30:46","guid":{"rendered":"https:\/\/7zeros.com\/?page_id=573"},"modified":"2026-09-11T11:53:26","modified_gmt":"2026-09-11T10:53:26","slug":"network-port-numbers","status":"publish","type":"page","link":"https:\/\/7zeros.com\/?page_id=573","title":{"rendered":"Network Port Numbers"},"content":{"rendered":"\n
TCP Port<\/strong><\/td>TCP\/UDP<\/strong><\/td>Service<\/strong><\/td><\/tr>
20<\/td>TCP<\/td>FTP data port<\/td><\/tr>
21<\/td>TCP<\/td>FTP control port<\/td><\/tr>
22<\/td>TCP<\/td>SSH, SCP, SFTP<\/td><\/tr>
23<\/td>TCP<\/td>Telnet<\/td><\/tr>
25<\/td>TCP<\/td>SMTP<\/td><\/tr>
49<\/td>TCP\/UDP<\/td>TACACS, TACACS+<\/td><\/tr>
53<\/td>TCP\/UDP<\/td>DNS<\/td><\/tr>
67<\/td>UDP<\/td>BOOTP server, also DHCP<\/td><\/tr>
68<\/td>UDP<\/td>BOOTP client, also DHCP<\/td><\/tr>
69<\/td>UDP<\/td>TFTP<\/td><\/tr>
80<\/td>TCP\/UDP<\/td>HTTP<\/td><\/tr>
88<\/td>TCP\/UDP<\/td>Kerberos authentication system<\/td><\/tr>
118<\/td>TCP\/UDP<\/td>SQL<\/td><\/tr>
123<\/td>UDP<\/td>NTP<\/td><\/tr>
143<\/td>TCP<\/td>IMAP<\/td><\/tr>
156<\/td>TCP\/UDP<\/td>SQL<\/td><\/tr>
161<\/td>UDP<\/td>SNMP<\/td><\/tr>
162<\/td>TCP\/UDP<\/td>SNMP\/TRAP<\/td><\/tr>
179<\/td>TCP<\/td>BGP<\/td><\/tr>
220<\/td>TCP\/UDP<\/td>IMAP v3<\/td><\/tr>
389<\/td>TCP<\/td>LDAP<\/td><\/tr>
443<\/td>TCP\/UDP<\/td>HTTPS uses TCP in v 1.x and 2
HTTP\/3 uses QUIC on top of UDP<\/td><\/tr>
445<\/td>TCP\/UDP<\/td>Microsoft-DS – Active Directory, SMB<\/td><\/tr>
464<\/td>TCP\/UDP<\/td>Kerberos change\/set password<\/td><\/tr>
500<\/td>UDP<\/td>ISAKMP \/ IKE<\/td><\/tr>
514<\/td>UDP<\/td>Syslog<\/td><\/tr>
543<\/td>TCP<\/td>Kerberos login<\/td><\/tr>
544<\/td>TCP<\/td>Kerberos remote shell<\/td><\/tr>
546<\/td>TCP\/UDP<\/td>DHCPv6 client<\/td><\/tr>
547<\/td>TCP\/UDP<\/td>DHCPv6 server<\/td><\/tr>
554<\/td>TCP\/UDP<\/td>RTSP<\/td><\/tr>
601<\/td>TCP<\/td>Reliable syslog service<\/td><\/tr>
636<\/td>TCP<\/td>LDAP over TLS\/SSL (LDAPS)<\/td><\/tr>
639<\/td>TCP\/UDP<\/td>MSDP (multicast)<\/td><\/tr>
646<\/td>TCP\/UDP<\/td>LDP (MPLS)<\/td><\/tr>
647<\/td>TCP<\/td>DHCP failover<\/td><\/tr>
694<\/td>TCP\/UDP<\/td>Linux HA heartbeat<\/td><\/tr>
701<\/td>TCP<\/td>LMP (TE)<\/td><\/tr>
749<\/td>TCP\/UDP<\/td>Kerberos admin<\/td><\/tr>
750<\/td>UDP<\/td>Kerberos version IV<\/td><\/tr>
830<\/td>TCP\/UDP<\/td>NETCONF over SSH<\/td><\/tr>
831<\/td>TCP\/UDP<\/td>NETCONF over BEEP<\/td><\/tr>
832<\/td>TCP\/UDP<\/td>NETCONF for SOAP over HTTPS<\/td><\/tr>
833<\/td>TCP\/UDP<\/td>NETCONF for SOAP over BEEP<\/td><\/tr>
847<\/td>TCP\/UDP<\/td>DHCP failover<\/td><\/tr>
853<\/td>TCP<\/td>DNS over TLS<\/td><\/tr>
853<\/td>UDP<\/td>DNS over QUIC or DNS over DTLS<\/td><\/tr>
873<\/td>TCP<\/td>rsync<\/td><\/tr>
953<\/td>TCP<\/td>BIND<\/td><\/tr>
989<\/td>TCP\/UDP<\/td>FTPS (control), FTP over TLS\/SSL<\/td><\/tr>
990<\/td>TCP\/UDP<\/td>FTPS (data), FTP over TLS\/SSL<\/td><\/tr>
1812<\/td>TCP\/UDP<\/td>RADIUS authentication<\/td><\/tr>
1813<\/td>TCP\/UDP<\/td>RADIUS accounting<\/td><\/tr>
4500<\/td>UDP<\/td>IPSEC NAT-T<\/td><\/tr>
49152 – 65535<\/td>TCP\/UDP<\/td>Dynamic ports<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

TCP Port TCP\/UDP Service 20 TCP FTP data port 21 TCP FTP control port 22 TCP SSH, SCP, SFTP 23 TCP Telnet 25 TCP SMTP 49 TCP\/UDP TACACS, TACACS+ 53 TCP\/UDP DNS 67 UDP BOOTP server, also DHCP 68 UDP BOOTP client, also DHCP 69 UDP TFTP 80 TCP\/UDP HTTP 88 TCP\/UDP Kerberos authentication system […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-573","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/pages\/573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7zeros.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=573"}],"version-history":[{"count":6,"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/pages\/573\/revisions"}],"predecessor-version":[{"id":580,"href":"https:\/\/7zeros.com\/index.php?rest_route=\/wp\/v2\/pages\/573\/revisions\/580"}],"wp:attachment":[{"href":"https:\/\/7zeros.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}