Resource Location Protocol (RLP)-used for determining the location of higher le vel services from hosts on a network Official 40 TCP UDP Unassigned Official 41 TCP UDP Graphics Official 42 TCP UDP nameserver, ARPA Host Name Server Protocol Official 42 TCP UDP WINS Unofficial 43 TCP WHOIS protocol Official 47 TCP UDP NI FTP Official 49 TCP UDP TACACS Login Host protocol Official 50 TCP UDP Remote Mail Checking Protocol Official 51 TCP UDP IMP Logical Address Maintenance Official 52 TCP UDP XNS (Xerox Network Systems) Time Protocol Official 53 TCP UDP Domain Name System (DNS) Official 54 TCP

Official 25 TCP Simple Mail Transfer Protocol (SMTP)-used for e-mail routing between mail servers Official 26 TCP UDP Unassigned Official 27 TCP UDP NSW User System FE Official 34 TCP UDP Remote File (RF)-used to transfer files between machines Unofficial 35 TCP UDP Any private printer server protocol Official 37 TCP UDP TIME protocol Official 39 TCP UDP Official 20 TCP FTP-data transfer Official 21 TCP FTP-control (command) Official 22 TCP UDP Secure Shell (SSH)-used for secure logins, file transfers (scp, sftp) and port for warding Official 23 TCP Telnet protocol-unencrypted text communications Official 24 TCP UDP Priv-mail : any private mail system. Official 8 TCP UDP Unassigned Official 9 TCP UDP Discard Protocol Official 10 TCP UDP Unassigned Official 11 TCP UDP Active Users (systat service) Official 12 TCP UDP Unassigned Official 13 TCP UDP Daytime Protocol (RFC 867) Official 14 TCP UDP Unassigned Official 15 TCP UDP netstat service Unofficial 16 TCP UDP Unassigned Official 17 TCP UDP Quote of the Day Official 18 TCP UDP Message Send Protocol Official 19 TCP UDP Character Generator Protocol (CHARGEN) Port TCP UDP Description Status 0 UDP Reserved Official 1 TCP UDP TCP Port Service Multiplexer (TCPMUX) Official 2 TCP UDP CompressNET Management Utility Official 3 TCP UDP CompressNET Compression Process Official 4 TCP UDP Unassigned Official 5 TCP UDP Remote Job Entry Official 6 TCP UDP Unassigned Official 7 TCP UDP Echo Protocol On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ports. They are used by system processes that provide widely-used types of network services.

List of TCP and UDP port numbers Table legend Color coding of table entries Official Port/application combination is registered with IANA Unofficial Port/application combination is not registered with IANA Conflict Port is in use for multiple applications (may be official or unofficial) Well-known ports: 0–1023 The port numbers in the range from 0 to 1023 are the well-known ports.

Install spiceworks on port 9675