🌐Network Protocols

Internet Protocol

IP/TCP

Common Ports and Protocols

Port Number	Protocol	Description
20	FTP-Data	Data channel for passing FTP files.
21	FTP-Command	Control channel for issuing commands to an FTP server.
22	SSH	Secure Shell Service port. Provides secure remote communications
23	Telnet	Telnet service provides cleartext communications between hosts.
25	SMTP	Simple Mail Transfer protocol. Utilized for email transmissions between servers.
53	DNS	Domain Name Services. Provides name resolution with multiple protocols
69	TFTP	Trivial File Transfer Protocol. A lightweight, minimal-function transfer protocol.
80	HTTP	HyperText Transfer Protocol. Provides dynamic web services
88	Kerberos	Providing cryptographic network authentication
110	POP3	Mail service utilized by clients to retrieve email from a server.
111	RPC	Remote Procedure Call. Remote service for managing network file systems.
115	SFTP	SSH File Transfer Protocol. An extension of SSH providing secure and reliable FTP services.
123	NTP	Network Time Protocol. Provides timing and sync services for network devices.
137	Netbios-NS	Local network name resolution.
139	Netbios-SSN	Provides session services for data transfer. Services like SMB can utilize it.
179	BGP	Border Gateway Protocol. BGP is a protocol for exchanging routing info with autonomous systems worldwide.
389	LDAP	Lightweight Directory Access Protocol. System agnostic authentication and authorization services.
443	HTTPS	HyperText Transfer Protocol Secure. An extension of HTTP utilizing SSL/TLS for encrypting the communications.
445	SMB	Server Message Block. SMB allows for the sharing of services, files, networking ports, and printers between hosts.