This protocol exchanges network packets between a client and server through a proxy server.ĭell EMC OpenManage Server Administrator Web GUI Registered Ports: 1024 – 49151 Port number Internet Message Access Protocol over TLS/SSL The rsync file synchronization protocol efficiently transfers and synchronizes files between devices and networked computers.įile Transfer Protocol (data) over TLS/SSLįile Transfer Protocol (control) over TLS/SSL Internet Small Computer Systems Interface Label Distribution Protocol, applies to routers capable of Multiprotocol Label Switching (MPLS) Multicast Source Discovery Protocol, which is part of the Protocol Independent Multicast (PIM) family Lightweight Directory Access Protocol over TLS/SSL Network News Transfer Protocol with encryption and verificationįileMaker Web Companion, the web publishing technology available in FileMaker versions 4-6ĭistributed Component Object Model (DCOM) DHCPv6 Clients listen for DHCPv6 messages on UDP port 546.ĭHCPv6 Servers and DHCPv6 Relay Agents listen for DHCPv6 messages on UDP port 547. Routing Information Protocol next generation, the IPv6 compatible version of RIPĭynamic Host Configuration Protocol version 6. Routing Information Protocol, used to find the optimal path between source and destination networks Line Printer Daemon protocol, or Line Printer Remote protocol Syslog Protocol, for collecting and organizing all of the log files sent from the various devices on a network The Unix program rlogin allows users to log in on another host using a network. Internet Protocol Security / Internet Security Association and Key Management Protocol / Internet Key Exchange Microsoft Directory Services: TCP for Active Directory, Windows shares UDP for Server Message Block (SMB) file-sharingĪuthenticated SMTP over TLS/SSL (SMTPS), URL Rendezvous Directory for Cisco’s Source Specific Multicast protocol (SSM)Ī software suite for backing up operating systems HTTP/3 uses QUIC, a transport protocol on top of UDP. Hypertext Transfer Protocol Secure (HTTPS) uses TCP in versions 1.x and 2. Trojan horses and computer viruses have used UDP port 201.ĭirect Connect Client-to-Client, Trap Convention Port Simple network management protocol listens for asynchronous trapsĪppleTalk Routing Maintenance. Simple network management protocol agents communicate on this port Internet Message Access Protocol (IMAP), management of electronic mail messages on a server NetBIOS Datagram Service, used for providing access to shared resources NetBIOS Name Service, used for name registration and resolution Microsoft Remote Procedure Call (RPC) Endpoint Mapper (EPMAP) service, for remote system access and management Identification Protocol, for identifying the user of a particular TCP connection Microsoft Exchange ISO Transport Service Access Point (TSAP) Class 0 protocol Hypertext Transfer Protocol (HTTP) uses TCP in versions 1.x and 2. HTTP/3 uses QUIC, a transport protocol on top of UDP Name/Finger protocol and Finger user information protocol, for retrieving and manipulating user information Gopher is a communication protocol for distributing, searching, and retrieving documents in Internet Protocol (IP) networks Terminal Access Controller Access-Control System, provides remote authentication and related services for network accessĭynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server server portĭynamic Host Configuration Protocol and its predecessor Bootstrap Protocol Server client port UDP can also use TCP but not necessarily on port 49 Whois service, provides domain-level information Microsoft Windows Internet Name Service, vulnerable to attacks on a local network Simple Mail Transfer Protocol, used for email routing between mail servers Telnet protocol, for unencrypted text communications Secure Shell, secure logins, file transfers ( scp, sftp), and port forwarding Well-known/System Ports: 0 – 1023 Port numberĬharacter Generator Protocol, has severe vulnerabilities and thus is rarely used nowadays The following tables cover services (and malware) that use common TCP ports and some UDP or SCTP ports.
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