Recognised as Network port

Port 23

Port 23 is registered to telnet: Telnet, unencrypted remote login. It runs over TCP and falls in the system (well-known) range.

Service

Port number23

IANA service nametelnet

Usually runsTelnet, unencrypted remote login

TransportTCP

Encrypted by defaultNotraffic is readable in transit unless the protocol adds its own encryption

IANA rangeSystem (well-known)assigned by IANA; binding needs privilege on Unix

Needs privilege to bindYes on Unixports below 1024 need root or CAP_NET_BIND_SERVICE

Hexadecimal0x0017

Binary0000000000010111

Bits needed5

Highest possible port65,535the field is 16 bits wide

Every link below is a page Nerdulator can generate from what it already knows about this value.